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Kerezoudi C, Samanidou VF, Gogos C, Tziafas D, Palaghias G. Evaluation of Monomer Leaching from a Resin Cement Through Dentin. Eur J Prosthodont Restor Dent 2019; 27:10-17. [PMID: 30779494 DOI: 10.1922/ejprd_01854kerezoudi09] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The aim of the study was to evaluate the elution of Triethylene glycol dimethacrylate (TEGDMA), Urethane dimethacrylate (UDMA), Bisphenol A glycerolate dimethacrylate (BisGMA), and Bisphenol A (BPA), from a dual-cured resin cement through human dentin, under constant positive pulpal pressure. Ten human dentin disks were adjusted into a custom made testing device and transparent glass slabs were luted with Variolink II cement, under a steady pressure. The device was filled with Ringer's solution and a pressure of 14.1 cm H₂O was applied. Eluates were retrieved from each one of the ten specimens at 9 time interval. All the samples were analyzed by High Performance Liquid Chromatography (HPLC). TEGDMA was detected from the second and UDMA was detected from the fourth time interval and then. The highest average concentration of TEGDMA and UDMA was detected in the 3 day time interval. Time had a significant effect on their elution. BPA and BisGMA were not detected in any sample of any time interval. The clinical relevance of the present study is that the concentration of the eluted monomers, under the conditions that were chosen, did not reach toxic levels for the pulp.
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Affiliation(s)
| | | | - C Gogos
- Aristotle University of Thessaloniki
| | - D Tziafas
- Aristotle University of Thessaloniki
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Samanidou VF, Kerezoudi C, Tolika E, Palaghias G. A Simple Isocratic HPLC Method for the Simultaneous Determination of the Five Most Common Residual Monomers Released from Resin-Based Dental Restorative Materials. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2014.968662] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- V. F. Samanidou
- Laboratory of Analytical Chemistry, Department of Chemistry, School of Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - C. Kerezoudi
- Department of Basic Dental Sciences, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - E. Tolika
- Laboratory of Analytical Chemistry, Department of Chemistry, School of Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - G. Palaghias
- Department of Basic Dental Sciences, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Samanidou VF, Livadiotou D, Palaghias G, Papadoyannis I. A Simple and Rapid HPLC Method for the Direct Determination of Residual Monomers Released From Dental Polymeric Materials in Blood Serum and Urine. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2014.896819] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry, School of Sciences , Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - D. Livadiotou
- a Laboratory of Analytical Chemistry, Department of Chemistry, School of Sciences , Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - G. Palaghias
- b Department of Basic Dental Sciences , School of Dentistry, Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - I. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry, School of Sciences , Aristotle University of Thessaloniki , Thessaloniki , Greece
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Uddin MN, Samanidou VF, Papadoyannis IN. Bio-Sample Preparation and Gas Chromatographic Determination of Benzodiazepines--A Review. J Chromatogr Sci 2013; 51:587-98. [DOI: 10.1093/chromsci/bms263] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Noula E, Samanidou VF, Assimopoulou AN, Papageorgiou VP, Papadoyannis IN. Solid-phase extraction for purification of alkannin/shikonin samples and isolation of monomeric and dimeric fractions. Anal Bioanal Chem 2010; 397:2221-32. [PMID: 20454954 DOI: 10.1007/s00216-010-3717-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2010] [Accepted: 04/03/2010] [Indexed: 11/28/2022]
Abstract
Isohexenylnaphthazarins (IHN), commonly known as alkannins and shikonins (A/S), are potent pharmaceutical substances with a wide spectrum of wound healing, antimicrobial, anti-inflammatory, and antitumor activity. Purification of A/S is crucial for their use in pharmaceuticals and for biological experimentation. Dimeric and oligomeric A/S derivatives co-exist with the active monomeric ones in most of the samples produced either by (semi)-synthesis or biotechnologically or isolated from natural products. Oligomeric A/S derivatives have not been studied for biological activity hitherto and a method to isolate them is essential.In the present study, solid-phase extraction (SPE) was applied for purification of commercial samples and isolation of monomeric and oligomeric A/S fractions, testing several stationary phases. Sephadex LH-20 cartridges achieved efficient purification for commercial samples containing both monomeric and dimeric A/S derivatives and also separation and isolation of both pure monomeric and dimeric A/S fractions for biological experiments. A high-performance liquid chromatography-diode array detection method was applied for detection, identification and quantification of monomeric and oligomeric shikonin fractions.
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Affiliation(s)
- E Noula
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 541 24, Greece
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Samanidou VF, Karageorgou EG, Papadoyannis IN. Development of a Validated HPLC Method for the Simultaneous Determination of Anabolic Steroids in Biological Fluids. J LIQ CHROMATOGR R T 2009. [DOI: 10.1080/10826070902841737] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
| | - E. G. Karageorgou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
| | - I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
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Samanidou VF, Tolika EP, Papadoyannis IN. Chromatographic Residue Analysis of Sulfonamides in Foodstuffs of Animal Origin. Separation & Purification Reviews 2008. [DOI: 10.1080/15422110802177472] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Samanidou VF, Nikolaidou KI, Papadoyannis IN. Development and Validation of a Gradient‐HPLC‐PDAD Method for the Identification of Ballpoint Pen Ink Components: Study of Their Decomposition on Aging for Forensic Science Applications. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-120027097] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , GR‐54124 , Thessaloniki , Greece
| | - K. I. Nikolaidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , GR‐54124 , Thessaloniki , Greece
| | - I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , GR‐54124 , Thessaloniki , Greece
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Samanidou VF, Karageorgou EG, Papadoyannis IN. Simultaneous Determination of Testosterone and its Major Metabolite Epitestosterone in Biological Fluids by HPLC. J LIQ CHROMATOGR R T 2007. [DOI: 10.1080/10826070701274916] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
| | - E. G. Karageorgou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
| | - I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
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Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
| | - S. A. Nisyriou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
| | - I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
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Samanidou VF, Nikolaidou KI, Papadoyannis IN. Advances in Chromatographic Analysis of Tetracyclines in Foodstuffs of Animal Origin—A Review. Separation & Purification Reviews 2007. [DOI: 10.1080/15422110600822758] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Samanidou VF, Anastasiadou K, Papadoyannis IN. Development and Validation of a Rapid HPLC Method for the Determination of Methadone and its Main Metabolite EDDP in Biological Fluids, Following SPE. J LIQ CHROMATOGR R T 2007. [DOI: 10.1080/10826070500531433] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - K. Anastasiadou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki , Greece
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Samanidou VF, Zacharis CK, Papadoyannis IN. DETERMINATION OF FLUORIDE IONS BY SINGLE COLUMN HIGH PRESSURE ANION CHROMATOGRAPHY IN DENTIFRICE PREPARATIONS AND BODY FLUIDS: SALIVA AND BLOOD SERUM. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-120003037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
| | - C. K. Zacharis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
| | - I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
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Georga KA, Samanidou VF, Papadoyannis IN. SIMULTANEOUS DETERMINATION OF METHYLURIC ACIDS IN BIOLOGICAL FLUIDS BY RP-HPLC ANALYSIS AFTER SOLID PHASE EXTRACTION. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-100102072] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- K. A. Georga
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki , GR-540 06 , Greece
| | - V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki , GR-540 06 , Greece
| | - I. N. Papadoyannis
- b Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki , GR-540 06 , Greece
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Papadoyannis IN, Samanidou VF, Nitsos CC. SIMULTANEOUS DETERMINATION OF NITRITE AND NITRATE IN DRINKING WATER AND HUMAN SERUM BY HIGH PERFORMANCE ANION-EXCHANGE CHROMATOGRAPHY AND UV DETECTION. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-100101783] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki , GR-540 06 , Greece
| | - V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki , GR-540 06 , Greece
| | - Ch. C. Nitsos
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki , GR-540 06 , Greece
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Samanidou VF, Antoniou CV, Papadoyannis IN. GRADIENT RP-HPLC DETERMINATION OF FREE PHENOLIC ACIDS IN WINES AND WINE VINEGAR SAMPLES AFTER SPE, WITH PHOTODIODE ARRAY IDENTIFICATION. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-100104899] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- V. F. Samanidou
- a Department of Chemistry , Laboratory of Analytical Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
| | - C. V. Antoniou
- a Department of Chemistry , Laboratory of Analytical Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
| | - I. N. Papadoyannis
- a Department of Chemistry , Laboratory of Analytical Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
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Samanidou VF, Sarantis GA, Papadoyannis IN. Development and Validation of a Rapid HPLC Method for the Direct Determination of Colchicine in Pharmaceuticals and Biological Fluids. J LIQ CHROMATOGR R T 2007. [DOI: 10.1080/10826070500357755] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
| | - G. A. Sarantis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
| | - I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, Greece
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Papadoyannis IN, Zotou A, Samanidou VF. DEVELOPMENT OF A SOLID PHASE EXTRACTION PROTOCOL FOR THE SIMULTANEOUS DETERMINATION OF ANTHRACENE AND ITS OXIDATION PRODUCTS IN SURFACE WATERS BY REVERSED-PHASE HPLC. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-120014381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- I. N. Papadoyannis
- a Laboratory of Analytical Chemistry , Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-541 24, Greece
| | - A. Zotou
- a Laboratory of Analytical Chemistry , Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-541 24, Greece
| | - V. F. Samanidou
- a Laboratory of Analytical Chemistry , Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-541 24, Greece
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Papadoyannis IN, Samanidou VF, Stefanidou PG. CLINICAL ASSAY OF NICOTINE AND ITS METABOLITE, COTININE, IN BODY FLUIDS BY HPLC FOLLOWING SOLID PHASE EXTRACTION. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-120014006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- I. N. Papadoyannis
- a Laboratory of Analytical Chemistry , Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54124, Greece
| | - V. F. Samanidou
- a Laboratory of Analytical Chemistry , Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54124, Greece
| | - P. G. Stefanidou
- a Laboratory of Analytical Chemistry , Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54124, Greece
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Papadoyannis IN, Samanidou VF, Panopoulou GD. The Use of Bamifylline as Internal Standard in the Reversed Phase HPLC Analysis of Mefenamic Acid in Pharmaceuticals and Small Volumes of Biological Fluids. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10826079208016370] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- I. N. Papadoyannis
- a Laboratory of Analytical Chemistry Department of Chemistry , Aristotelian University of Thessaloniki , 54006 , Thessaloniki , Greece
| | - V. F. Samanidou
- a Laboratory of Analytical Chemistry Department of Chemistry , Aristotelian University of Thessaloniki , 54006 , Thessaloniki , Greece
| | - G. D. Panopoulou
- a Laboratory of Analytical Chemistry Department of Chemistry , Aristotelian University of Thessaloniki , 54006 , Thessaloniki , Greece
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Papadoyannis IN, Samanidou VF, Georga KA. Solid-Phase Extraction Study and Photodiode Array RP-HPLC Analysis of Xanthine Derivatives in Human Biological Fluids. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079608014038] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- I. N. Papadoyannis
- a Laboratory of Analytical Chemistry Chemistry Department Aristotle , University of Thessaloniki GR , 54006, Thessaloniki, Greece
| | - V. F. Samanidou
- a Laboratory of Analytical Chemistry Chemistry Department Aristotle , University of Thessaloniki GR , 54006, Thessaloniki, Greece
| | - K. A. Georga
- a Laboratory of Analytical Chemistry Chemistry Department Aristotle , University of Thessaloniki GR , 54006, Thessaloniki, Greece
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Papadoyannis IN, Tsioni GK, Samanidou VF. Simultaneous Determination of Nine Water and Fat Soluble Vitamins After SPE Separation and RP-HPLC Analysis in Pharmaceutical Preparations and Biological Fluids. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079708000485] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- I. N. Papadoyannis
- a Laboratory of Analytical Chemistry Department of Chemistry , Aristotle University of Thessaloniki , GR-54006, Thessaloniki, Greece
| | - G. K. Tsioni
- a Laboratory of Analytical Chemistry Department of Chemistry , Aristotle University of Thessaloniki , GR-54006, Thessaloniki, Greece
| | - V. F. Samanidou
- a Laboratory of Analytical Chemistry Department of Chemistry , Aristotle University of Thessaloniki , GR-54006, Thessaloniki, Greece
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Papadoyannis IN, Samanidou VF, Moutsis KV. Determination of Silver Iodide by High Pressure Ion Chromatography in Soil and Water Matrices After Solid Phase Extraction. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079808000496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- I. N. Papadoyannis
- a Laboratory of Analytical Chemistry Chemistry Department , Aristotle University of Thessaloniki , GR-54006, Thessaloniki, Greece
| | - V. F. Samanidou
- a Laboratory of Analytical Chemistry Chemistry Department , Aristotle University of Thessaloniki , GR-54006, Thessaloniki, Greece
| | - K. V. Moutsis
- a Laboratory of Analytical Chemistry Chemistry Department , Aristotle University of Thessaloniki , GR-54006, Thessaloniki, Greece
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Papadoyannis IN, Samanidou VF, Georga KA, Georgarakis E. High Pressure Liquid Chromatographic Determination of Hydrochlorothiazide (HCT) in Pharmaceutical Preparations and Human Serum After Solid Phase Extraction. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079808001251] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- I. N. Papadoyannis
- a Laboratory of Analytical Chemistry Department of Chemistry , University of Thessaloniki , GR-54006, Thessaloniki, Greece
| | - V. F. Samanidou
- a Laboratory of Analytical Chemistry Department of Chemistry , University of Thessaloniki , GR-54006, Thessaloniki, Greece
| | - K. A. Georga
- a Laboratory of Analytical Chemistry Department of Chemistry , University of Thessaloniki , GR-54006, Thessaloniki, Greece
| | - E. Georgarakis
- b Section of Pharmaceutics and Drug Control Department of Pharmacy Aristotle , University of Thessaloniki , GR-54006, Thessaloniki, Greece
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Samanidou VF, Gika HG, Papadoyannis IN. RAPID HPLC ANALYSIS OF THYROID GLAND HORMONES TRI-IODOTHYRONINE (T3) AND THYROXINE (T4) IN HUMAN BIOLOGICAL FLUIDS AFTER SPE. J LIQ CHROMATOGR R T 2006. [DOI: 10.1081/jlc-100101481] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
| | - H. G. Gika
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
| | - I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
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Georga KA, Samanidou VF, Papadoyannis IN. IMPROVED MICRO-METHOD FOR THE HPLC ANALYSIS OF CAFFEINE AND ITS DEMETHYLATED METABOLITES IN HUMAN BIOLOGICAL FLUIDS AFTER SPE. J LIQ CHROMATOGR R T 2006. [DOI: 10.1081/jlc-100100432] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- K. A. Georga
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
| | - V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
| | - I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
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Samanidou VF, Imamidou IP, Papadoyannis IN. EVALUATION OF SOLID PHASE EXTRACTION PROTOCOLS FOR ISOLATION OF ANALGESIC COMPOUNDS FROM BIOLOGICAL FLUIDS PRIOR TO HPLC DETERMINATION. J LIQ CHROMATOGR R T 2006. [DOI: 10.1081/jlc-100108739] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
| | - I. P. Imamidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
| | - I. N. Papadoyannis
- b Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
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Samanidou VF, Metaxa AS, Papadoyannis IN. DIRECT SIMULTANEOUS DETERMINATION OF UREMIC TOXINS: CREATINE, CREATININE, URIC ACID, AND XANTHINE IN HUMAN BIOFLUIDS BY HPLC. J LIQ CHROMATOGR R T 2006. [DOI: 10.1081/jlc-100108538] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki , GR-54006 , Greece
| | - A. S. Metaxa
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki , GR-54006 , Greece
| | - I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki , GR-54006 , Greece
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Chubar NI, Samanidou VF, Kouts VS, Gallios GG, Kanibolotsky VA, Strelko VV, Zhuravlev IZ. Adsorption of fluoride, chloride, bromide, and bromate ions on a novel ion exchanger. J Colloid Interface Sci 2005; 291:67-74. [PMID: 15964584 DOI: 10.1016/j.jcis.2005.04.086] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2005] [Revised: 04/27/2005] [Accepted: 04/27/2005] [Indexed: 11/26/2022]
Abstract
A novel ion exchanger based on double hydrous oxide (Fe2O3Al2O3xH2O) was obtained by the original sol-gel method from easily available and cheap raw materials and employed for adsorption of F-, Cl-, Br-, and BrO-3 from simultaneous solutions. Adsorbent was characterized by potentiometric titration, zeta-potential, and poremetrical characteristics. A technologically attractive pH effect of F-, Br-, and BrO-3 sorption on the investigated double hydroxide of Fe and Al, which is capable of working in the pH range 3 to 8.5, was observed. Kinetic data on fluoride and bromide sorption fit well the pseudo-second-order model. Isotherms of fluoride, bromide, chlorine, and bromate ion sorption on Fe2O3Al2O3xH2O were obtained at pH 4. The isotherm of F- sorption fit well the Langmuir model; sorption affinity (K=0.52 L/mg) and sorption capacity (90 mg F/g) were high. In the competitive adsorption of bromide and bromate, bromide dominated at equilibrium concentrations of the ions >40 mg/L. The mechanism of fluoride adsorption to the surface of the model cluster of the sorbent synthesized and the geometry of the cluster itself were modeled with the HyperChem7 program using the PM3 method.
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Affiliation(s)
- N I Chubar
- Institute for Sorption and Problems of Endoecology, National Academy of Sciences of Ukraine, 13, General Naumov str., 03680 Kiev, Ukraine.
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Samanidou VF, Ioannou AS, Papadoyannis IN. The use of a monolithic column to improve the simultaneous determination of four cephalosporin antibiotics in pharmaceuticals and body fluids by HPLC after solid phase extraction—a comparison with a conventional reversed-phase silica-based column. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 809:175-82. [PMID: 15282109 DOI: 10.1016/j.jchromb.2004.06.019] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2004] [Revised: 06/14/2004] [Accepted: 06/14/2004] [Indexed: 11/26/2022]
Abstract
The use of a monolithic column (Chromolith, SpeedROD RP-18e, by Merck) was studied on the determination of cephalosporin antibiotics. Results were compared with those from a previously developed analytical method using conventional silica-based analytical column. A rapid, accurate and sensitive method has been developed and validated for the quantitative simultaneous determination of four cephalosporins: Cephalexine and Cephadroxil (first generation), Cefaclor (second generation) and Cefotaxim (third generation) in pharmaceuticals as well as in human blood serum and urine. Hydroflumethiazide (HFM) (3,4-dihydro-6(trifluoromethyl)-2H-1,2,4-benzothiadiazine-7-sulfonamide-1,1-dioxide) was used as an internal standard at a concentration of 1.5 ng/microL. A rectilinear relationship was observed up to 5 ng/microL for the four compounds. Analysis time was less than 4 min. The statistical evaluation of the method was examined by means of within-day repeatability (n=8) and day-to-day precision (n=8) and was found to be satisfactory with high accuracy and precision results. The method was applied to the determination of the cephalosporins in commercial pharmaceuticals and in biological fluids: human blood serum after solid phase extraction and urine simply after filtration and dilution. Recovery of analytes in spiked serum samples was in the range from 88.7 to 107.8%, while for urine samples recovery was from 98.0 to 105.6%. By comparing the figures of merit for the monolithic column and the silica-based one, regarding the determination of the four cephalosporins investigated in the present study, the outstanding efficiency of the monolithic column can be noticed.
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Affiliation(s)
- V F Samanidou
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
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Samanidou VF, Hapeshi EA, Papadoyannis IN. Rapid and sensitive high-performance liquid chromatographic determination of four cephalosporin antibiotics in pharmaceuticals and body fluids. J Chromatogr B Analyt Technol Biomed Life Sci 2003; 788:147-58. [PMID: 12668080 DOI: 10.1016/s1570-0232(02)01040-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A rapid, accurate and sensitive method has been developed and validated for the quantitative simultaneous determination of four cephalosporins, cephalexin and cefadroxil (first-generation), cefaclor (second-generation) and cefataxim (third-generation), in pharmaceuticals as well as in human blood serum and urine. A Spherisorb ODS-2 250 x 4-mm, 5-microm analytical column was used with an eluting system consisting of a mixture of acetate buffer (pH 4.0)-CH(3)OH 78-22% (v/v) at a flow-rate 1.2 ml/min. Detection was performed with a variable wavelength UV-Vis detector at 265 nm resulting in limit of detection of 0.2 ng for cefadroxil and cephalexin, but only 0.1 ng for cefotaxime and cefaclor per 20-microl injection. Hydrochlorothiazide (HCT) (6-chloro-3,4-dihydro-7 sulfanyl-2H-1,2,4-benzothiadiazine-1-1-dioxide) was used as internal standard at a concentration of 2 ng/microl. A rectilinear relationship was observed up to 8, 5, 12 and 35 ng/microl for cefadroxil, cefotaxime, cefaclor, cephalexin, respectively. Analysis time was less than 7 min. The statistical evaluation of the method was examined by means of within-day repeatability (n=8) and day-to-day precision (n=9) and was found to be satisfactory with high accuracy and precision. The method was applied to the determination of the cephalosporins in commercial pharmaceuticals and in biological fluids: human blood serum after solid-phase extraction and urine simply after filtration and dilution. Recovery of analytes in spiked samples was in the range from 76.3 to 112.0%, over the range of 1-8 ng/microl.
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Affiliation(s)
- V F Samanidou
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Greece
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Samanidou VF, Demetriou CE, Papadoyannis IN. Direct determination of four fluoroquinolones, enoxacin, norfloxacin, ofloxacin, and ciprofloxacin, in pharmaceuticals and blood serum by HPLC. Anal Bioanal Chem 2003; 375:623-9. [PMID: 12638045 DOI: 10.1007/s00216-003-1749-9] [Citation(s) in RCA: 134] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2002] [Revised: 12/04/2002] [Accepted: 12/09/2002] [Indexed: 10/20/2022]
Abstract
A rapid, accurate and sensitive method has been developed for the quantitative determination of four fluoroquinolone antimicrobial agents, enoxacin, norfloxacin, ofloxacin and ciprofloxacin, with high in-vitro activity against a wide range of Gram-negative and Gram-positive organisms.A Kromasil 100 C(8) 250 mm x 4 mm, 5 microm analytical column was used with an eluting system consisting of a mixture of CH(3)CN-CH(3)OH-citric acid 0.4 mol L(-1) (7:15:78 %, v/v). Detection was performed with a variable wavelength UV-visible detector at 275 nm resulting in limits of detection: 0.02 ng per 20 microL injection for enoxacin and 0.01 ng for ofloxacin, norfloxacin and ciprofloxacin. Hydrochlorothiazide (HCT) was used as internal standard at a concentration of 2 ng microL(-1). A rectilinear relationship was observed up to 2 ng microL(-1) for enoxacin, 12 ng microL(-1) for ofloxacin, 3 ng microL(-1) for norfloxacin, and 5 ng microL(-1) for ciprofloxacin. Separation was achieved within 10 min. The statistical evaluation of the method was examined by performing intra-day (n=8) and inter-day precision assays (n=8) and was found to be satisfactory with high accuracy and precision. The method was applied to the direct determination of the four fluoroquinolones in human blood serum. Sample pretreatment involved only protein precipitation with acetonitrile. Recovery of analytes in spiked samples was 97+/-6% over the range 0.1-0.5 ng microL(-1).
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Affiliation(s)
- V F Samanidou
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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Georgia KA, Samanidou VF, Papadoyannis IN. Use of novel solid-phase extraction sorbent materials for high-performance liquid chromatography quantitation of caffeine metabolism products methylxanthines and methyluric acids in samples of biological origin. J Chromatogr B Biomed Sci Appl 2001; 759:209-18. [PMID: 11499474 DOI: 10.1016/s0378-4347(01)00251-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
An automated reversed-phase high-performance liquid chromatographic (RP-HPLC) method, using a linear gradient elution, is described for the simultaneous analysis of caffeine and metabolites according to their elution order: 7-methyluric acid, 1-methyluric acid, 7-methylxanthine, 3-methylxanthine, 1-methylxanthine, 1,3-dimethyluric acid, theobromine, 1,7-dimethyluric acid, paraxanthine and theophylline. The analytical column, an MZ Kromasil C4, 250 x 4 mm, 5 microm, was operated at ambient temperature with back pressure values of 80-110 kg/cm2. The mobile phase consisted of an acetate buffer (pH 3.5)-methanol (97:3, v/v) changing to 80:20 v/v in 20 min time, delivered at a flow-rate of 1 ml/min. Paracetamol was used as internal standard at a concentration of 6.18 ng/microl. Detection was performed with a variable wavelength UV-visible detector at 275 nm, resulting in detection limits of 0.3 ng per 10-microl injection, while linearity held up to 8 ng/microl for most of analytes, except for paraxanthine and theophylline, for which it was 12 ng/microl and for caffeine for which it was 20 ng/microl. The statistical evaluation of the method was examined performing intra-day (n=6) and inter-day calibration (n=7) and was found to be satisfactory, with high accuracy and precision results. High extraction recoveries from biological matrices: blood serum and urine ranging from 84.6 to 103.0%, were achieved using Nexus SPE cartridges with hydrophilic and lipophilic properties and methanol-acetate buffer (pH 3.5) (50:50, v/v) as eluent, requiring small volumes, 40 microl of blood serum and 100 microl of urine.
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Affiliation(s)
- K A Georgia
- Department of Chemistry, Aristotle University of Thessaloniki, Greece
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Samanidou VF, Stafylis AH, Papadoyannis IN. DIRECT HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY METHOD FOR DETERMINATION OF GLYCINE BETAINE AND ITS METABOLITE, N, N-DIMETHYLGLYCINE, IN PHARMACOKINETIC STUDIES. J LIQ CHROMATOGR R T 2001. [DOI: 10.1081/jlc-100000322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- V. F. Samanidou
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
| | - A. H. Stafylis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
| | - I. N. Papadoyannis
- a Laboratory of Analytical Chemistry, Department of Chemistry , Aristotle University of Thessaloniki , Thessaloniki, GR-54006, Greece
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Papadoyannis IN, Samanidou VF, Kovatsi LA. A rapid high performance liquid chromatographic (HPLC) assay for the determination of oxytetracycline in commercial pharmaceuticals. J Pharm Biomed Anal 2000; 23:275-80. [PMID: 10933520 DOI: 10.1016/s0731-7085(00)00300-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
In the present study, a simple, sensitive and rapid reversed-phase high performance liquid chromatographic (HPLC) method with ultraviolet detection for the analysis of oxytetracycline (OTC) is developed and applied to the determination of the antibiotic in commercial pharmaceutical preparations (powder, capsules, vaginal tablets and ointment). The isocratic elution is performed with methanol-0.01 M oxalic acid, pH 3.0 (30:70, v/v) at a flow rate of 0.95 ml min, using a Silasorb C8 analytical column, 250 x 4 mm, 10 microm. Codeine is used as internal standard. Absorbance is monitored at 250 nm where both analyte of interest and internal standard have significant absorption. Total analysis time was approximately 7 min. Data with respect to precision and accuracy and limits of detection are reported and discussed. The described method can be readily utilised for analysis of pharmaceutical products and pharmacokinetic studies as well.
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Affiliation(s)
- I N Papadoyannis
- Department of Chemistry, Aristotle University of Thessaloniki, Greece.
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Papadoyannis IN, Zotou AC, Samanidou VF. Solid-Phase Extraction Study and RP-HPLC Analysis of Lamotrigine in Human Biological Fluids and in Antiepileptic Tablet Formulations. ACTA ACUST UNITED AC 1995. [DOI: 10.1080/10826079508009311] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Papadoyannis IN, Samanidou VF, Tsoukali H, Epivatianou F. Comparison of a RP-HPLC Method with the Therapeutic Drug Monitoring System TDxfor the Determination of Theophylline in Blood Serum. ANAL LETT 1993. [DOI: 10.1080/00032719308017457] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Papadoyannis IN, Samanidou VF. The Use of Theobromine As Internal Standard in the Rapid HPLC Analysis ofTheophyllinein Small Blood Serum Volume. ANAL LETT 1993. [DOI: 10.1080/00032719308019869] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Papadoyannis IN, Samanidou VF, Theodoridis GA, Vasilikiotis GS, Van Kempen GJM, Beelen GM. A Simple and Quick Solid Phase Extraction and Reversed Phase HPLC Analysis of Some Tropane Alkaloids in Feedstuffs and Biological Samples. ACTA ACUST UNITED AC 1993. [DOI: 10.1080/10826079308019565] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Papadoyannis LN, Zotou AC, Samanidou VF. Simultaneous Reversed-Phase Gradient-HPLC Analysis of Anthranilic Acid Derivatives in Anti-Inflammatory Drugs and Samples of Biological Interest. ACTA ACUST UNITED AC 1992. [DOI: 10.1080/10826079208020868] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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