1
|
Breuninger ES, Tolu J, Bouchet S, Winkel LHE. Sensitive analysis of selenium speciation in natural seawater by isotope-dilution and large volume injection using PTV-GC-ICP-MS. Anal Chim Acta 2023; 1279:341833. [PMID: 37827648 DOI: 10.1016/j.aca.2023.341833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/14/2023] [Accepted: 09/17/2023] [Indexed: 10/14/2023]
Abstract
Although oceans play a key role in the global selenium (Se) cycle, there is currently very little quantitative information available on the distribution of Se concentrations and Se speciation in marine environments. In general, determining Se concentration and speciation in seawater is highly challenging due to very low Se levels ((sub)ng⋅L-1), whereas matrix elements interfering Se pre-concentration and detection are up to the g⋅L-1 levels. In this study, we established a sensitive method for the determination of the various Se chemical fractions present in natural seawater, i.e. selenite (SeIV), selenate (SeVI), organic Se-II + Se0 and total Se, using species-specific isotope dilution gas chromatography coupled to inductively coupled plasma mass spectrometry (ID-GC-ICP-MS). We compared different derivatization reagents and optimized specific pre-treatment protocols, including a microwave assisted oxidation protocol for the determination of total Se and organic Se-II + Se0 using H2O2. To increase sensitivity, we developed an online pre-concentration method based on large volume injection (LVI) using a programmed temperature vaporization (PTV) inlet. Eventually, the developed method achieved low absolute and methodological detection limits, i.e., respectively, 0.1-0.3 pg and 0.9-3.1 ng.L-1 for the different fractions. The accuracy of our method was of 2% for a certified reference material (CRM) diluted in artificial seawater while the precision was better than 4% for a freshwater CRM in artificial seawater matrix as well as two common seawater CRMs certified for trace elements excluding Se. As a proof-of-concept, we quantified the various Se fractions in a large number of natural water samples from the Baltic and North Seas, encompassing a wide range of salinity (7-35 psu), which shows that its detection limits are sufficient to determine total Se, SeIV, SeVI and organic Se-II + Se0 concentrations in brackish and marine systems.
Collapse
Affiliation(s)
- Esther S Breuninger
- Institute of Biogeochemistry & Pollutant Dynamics, Dept. of Environmental Sciences, Swiss Federal Institute of Technology (ETHZ), Universitätstrasse 16, 8092, Zurich, Switzerland; Department Water Resources and Drinking Water, Swiss Federal Institute of Aquatic Science & Technology (Eawag), Überlandstrasse 133, 8600, Dübendorf, Switzerland
| | - Julie Tolu
- Institute of Biogeochemistry & Pollutant Dynamics, Dept. of Environmental Sciences, Swiss Federal Institute of Technology (ETHZ), Universitätstrasse 16, 8092, Zurich, Switzerland; Department Water Resources and Drinking Water, Swiss Federal Institute of Aquatic Science & Technology (Eawag), Überlandstrasse 133, 8600, Dübendorf, Switzerland
| | - Sylvain Bouchet
- Institute of Biogeochemistry & Pollutant Dynamics, Dept. of Environmental Sciences, Swiss Federal Institute of Technology (ETHZ), Universitätstrasse 16, 8092, Zurich, Switzerland; Department Water Resources and Drinking Water, Swiss Federal Institute of Aquatic Science & Technology (Eawag), Überlandstrasse 133, 8600, Dübendorf, Switzerland.
| | - Lenny H E Winkel
- Institute of Biogeochemistry & Pollutant Dynamics, Dept. of Environmental Sciences, Swiss Federal Institute of Technology (ETHZ), Universitätstrasse 16, 8092, Zurich, Switzerland; Department Water Resources and Drinking Water, Swiss Federal Institute of Aquatic Science & Technology (Eawag), Überlandstrasse 133, 8600, Dübendorf, Switzerland.
| |
Collapse
|
2
|
He M, Su S, Chen B, Hu B. Simultaneous speciation of inorganic selenium and tellurium in environmental water samples by polyaniline functionalized magnetic solid phase extraction coupled with ICP-MS detection. Talanta 2020; 207:120314. [DOI: 10.1016/j.talanta.2019.120314] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 08/27/2019] [Accepted: 09/02/2019] [Indexed: 11/28/2022]
|
3
|
Ochsenkühn-Petropoulou M, Tsopelas F, Ruzik L, Bierła K, Szpunar J. Selenium and Selenium Species. Metallomics 2016. [DOI: 10.1002/9783527694907.ch6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maria Ochsenkühn-Petropoulou
- National Technical University of Athens, School of Chemical Engineering; Laboratory of Inorganic and Analytical Chemistry; Iroon Polytechneiou 9, Zografou Campus 157 80 Athens Greece
| | - Fotios Tsopelas
- Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Lena Ruzik
- National Technical University of Athens, School of Chemical Engineering; Laboratory of Inorganic and Analytical Chemistry; Iroon Polytechneiou 9, Zografou Campus 157 80 Athens Greece
| | - Katarzyna Bierła
- Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Joanna Szpunar
- CNRS-UPPA IPREM; , Laboratory of Bioinorganic Analytical and Environmental Chemistry, UMR 5254; 2, Avenue Président Angot 64053 Pau France
| |
Collapse
|
4
|
Aboelmagd A, El-Safty SA, Shenashen MA, Elshehy EA, Khairy M, Sakaic M, Yamaguchi H. Nanomembrane Canister Architectures for the Visualization and Filtration of Oxyanion Toxins with One-Step Processing. Chem Asian J 2015; 10:2467-78. [PMID: 26178184 DOI: 10.1002/asia.201500565] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Indexed: 01/12/2023]
Abstract
Nanomembrane canister-like architectures were fabricated by using hexagonal mesocylinder-shaped aluminosilica nanotubes (MNTs)-porous anodic alumina (PAA) hybrid nanochannels. The engineering pattern of the MNTs inside a 60 μm-long membrane channel enabled the creation of unique canister-like channel necks and cavities. The open-tubular canister architecture design provides controllable, reproducible, and one-step processing patterns of visual detection and rejection/permeation of oxyanion toxins such as selenite (SeO3(2-)) in aquatic environments (i.e., in ground and river water sources) in the Ibaraki Prefecture of Japan. The decoration of organic ligand moieties such as omega chrome black blue (OCG) into inorganic Al2O3@tubular SiO2/Al2O3 canister membrane channel cavities led to the fabrication of an optical nanomembrane sensor (ONS). The OCG ligand was not leached from the canister as observed in washing, sensing, and recovery assays of selenite anions in solution, which enabled its multiple reuse. The ONS makes a variety of alternate processing analyses of selective quantification, visual detection, rejection/permeation, and recovery of toxic selenite quick and simple without using complex instrumentation. Under optimal conditions, the ONS canister exhibited a high selectivity toward selenite anions relative to other ions and a low-level detection limit of 0.0093 μM. Real analytical data showed that approximately 96% of SeO3(2-) anions can be recovered from aquatic and wastewater samples. The ONS canister holds potential for field recovery applications of toxic selenite anions from water.
Collapse
Affiliation(s)
- Ahmed Aboelmagd
- National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukubashi, Ibaraki-ken, 305-0047, Japan)
| | - Sherif A El-Safty
- National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukubashi, Ibaraki-ken, 305-0047, Japan). , .,Graduate School for Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan). ,
| | - Mohamed A Shenashen
- National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukubashi, Ibaraki-ken, 305-0047, Japan)
| | - Emad A Elshehy
- National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukubashi, Ibaraki-ken, 305-0047, Japan)
| | - Mohamed Khairy
- National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukubashi, Ibaraki-ken, 305-0047, Japan)
| | - Masaru Sakaic
- Centre for Research in Isotopes & Environmental Dynamics, Tsukuba University, 265-38 Shin Makita, Tsukuba-shi, Ibaraki, 305-0076, Japan
| | - Hitoshi Yamaguchi
- National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukubashi, Ibaraki-ken, 305-0047, Japan)
| |
Collapse
|
5
|
Quantification of volatile-alkylated selenium and sulfur in complex aqueous media using solid-phase microextraction. J Chromatogr A 2015; 1407:11-20. [PMID: 26150251 DOI: 10.1016/j.chroma.2015.06.054] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 06/16/2015] [Accepted: 06/19/2015] [Indexed: 01/20/2023]
Abstract
Biologically produced volatile-alkylated Se and S compounds play an important role in the global biogeochemical Se and S cycles, are important constituents of odorous industrial emissions, and contribute to (off-)flavors in food and beverages. This study presents a fully automated direct-immersion solid-phase microextraction (DI-SPME) method coupled with capillary gas chromatography-mass spectrometry (GC/MS) for the simultaneous quantification of 10 volatile-alkylated Se and S compounds in complex aqueous media. Instrumental parameters of the SPME procedure were optimized to yield extraction efficiencies of up to 96% from complex aqueous matrices. The effects of sample matrix composition and analyte transformation during sample storage were critically assessed. With the use of internal standards and procedural calibrations, the DI-SPME-GC/MS method allows for trace-level quantification of volatile Se and S compounds in the ng/L range (e.g. down to 30 ng/L dimethyl sulfide and 75 ng/L dimethyl selenide). The applicability and robustness of the presented method demonstrate that the method may be used to quantify volatile Se and S compounds in complex aqueous samples, such as industrial effluents or food and beverage samples.
Collapse
|
6
|
Price HL, Teasdale PR, Jolley DF. An evaluation of ferrihydrite- and Metsorb™-DGT techniques for measuring oxyanion species (As, Se, V, P): Effective capacity, competition and diffusion coefficients. Anal Chim Acta 2013; 803:56-65. [DOI: 10.1016/j.aca.2013.07.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 06/30/2013] [Accepted: 07/03/2013] [Indexed: 11/30/2022]
|
7
|
Herrero Latorre C, Barciela García J, García Martín S, Peña Crecente RM. Solid phase extraction for the speciation and preconcentration of inorganic selenium in water samples: a review. Anal Chim Acta 2013; 804:37-49. [PMID: 24267061 DOI: 10.1016/j.aca.2013.09.054] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 09/26/2013] [Accepted: 09/29/2013] [Indexed: 11/29/2022]
Abstract
Selenium is an essential element for the normal cellular function of living organisms. However, selenium is toxic at concentrations of only three to five times higher than the essential concentration. The inorganic forms (mainly selenite and selenate) present in environmental water generally exhibit higher toxicity (up to 40 times) than organic forms. Therefore, the determination of low levels of different inorganic selenium species in water is an analytical challenge. Solid-phase extraction has been used as a separation and/or preconcentration technique prior to the determination of selenium species due to the need for accurate measurements for Se species in water at extremely low levels. The present paper provides a critical review of the published methods for inorganic selenium speciation in water samples using solid phase extraction as a preconcentration procedure. On the basis of more than 75 references, the different speciation strategies used for this task have been highlighted and classified. The solid-phase extraction sorbents and the performance and analytical characteristics of the developed methods for Se speciation are also discussed.
Collapse
Affiliation(s)
- C Herrero Latorre
- Universidad de Santiago de Compostela, Dpto. Química Analítica, Nutrición y Bromatología, Facultad de Ciencias, Alfonso X el Sabio s/n, 27002 Lugo, Spain.
| | | | | | | |
Collapse
|
8
|
Lenz M, Floor GH, Winkel LHE, Román-Ross G, Corvini PFX. Online preconcentration-IC-ICP-MS for selenium quantification and speciation at ultratraces. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:11988-11994. [PMID: 23020752 DOI: 10.1021/es302550b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Selenium (Se) is of key importance to human health with a very narrow concentration range of optimal dietary intake. Due to the inherent analytical challenge linked with the low natural abundance, information on precise and accurate Se speciation in deficient environments is hardly existent. This study presents a novel approach to determine Se species-specifically at ultratraces, by online coupling of a preconcentration (trap) column to an ion chromatography inductively coupled plasma mass spectrometry (IC-ICP-MS) system. It is demonstrated that with this robust and work/time efficient method, the predominant selenium oxyanions, selenite (Se(IV)) and selenate (Se(VI)), can be quantified down to 7.3 and 8.3 picogram total Se, respectively, in an overall analytical time of 420 s, only. The applicability for environmental samples was proven on pristine volcanic ashes collected from seven different volcanoes. The high sensitivity of the novel approach allowed to determine speciation in samples that were strongly depleted in total selenium (<0.05 mg kg(-1) Se) with only minor fractions of Se mobilized (i.e., less than 10% of the total selenium was leached in 10 out of 12 samples). The studied samples showed considerate differences in selenium speciation, with selenite and selenate co-occurring in most samples. The fact that the studied sample leachates had a wide range of pH (3.78-9.55) and major anion/cation composition underlines the versatility and wide potential application range of the method presented.
Collapse
Affiliation(s)
- Markus Lenz
- Institute for Ecopreneurship, University of Applied Sciences and Arts Northwestern Switzerland (FHNW), School of Life Sciences, Gründenstrasse 40, 4132 Muttenz, Switzerland.
| | | | | | | | | |
Collapse
|
9
|
Ghasemi E, Farahani H. Head space solid phase microextraction based on nano-structured lead dioxide: Application to the speciation of volatile organoselenium in environmental and biological samples. J Chromatogr A 2012; 1258:16-20. [DOI: 10.1016/j.chroma.2012.08.027] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 08/08/2012] [Accepted: 08/09/2012] [Indexed: 11/27/2022]
|
10
|
Duan J, Hu B, He M. Nanometer-sized alumina packed microcolumn solid-phase extraction combined with field-amplified sample stacking-capillary electrophoresis for the speciation analysis of inorganic selenium in environmental water samples. Electrophoresis 2012; 33:2953-60. [DOI: 10.1002/elps.201200156] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Revised: 06/12/2012] [Accepted: 07/11/2012] [Indexed: 11/10/2022]
|
11
|
Comparison of ultrasound-assisted emulsification and dispersive liquid–liquid microextraction methods for the speciation of inorganic selenium in environmental water samples using low density extraction solvents. Anal Chim Acta 2012; 714:82-8. [DOI: 10.1016/j.aca.2011.11.063] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2011] [Revised: 11/27/2011] [Accepted: 11/29/2011] [Indexed: 11/23/2022]
|
12
|
Gomes da Silva E, Augusto F, Arruda MAZ. Determination of Se using a solid-phase micro-extraction device coupled to a graphite furnace and detection by gas chromatography-mass spectrometry. Analyst 2012; 137:3841-6. [DOI: 10.1039/c2an35598a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
13
|
Tsoi YK, Leung KSY. Toward the use of surface modified activated carbon in speciation: Selective preconcentration of selenite and selenate in environmental waters. J Chromatogr A 2011; 1218:2160-4. [DOI: 10.1016/j.chroma.2011.02.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Revised: 02/08/2011] [Accepted: 02/09/2011] [Indexed: 10/18/2022]
|
14
|
Ghasemi E, Sillanpää M, Najafi NM. Headspace hollow fiber protected liquid-phase microextraction combined with gas chromatography-mass spectroscopy for speciation and determination of volatile organic compounds of selenium in environmental and biological samples. J Chromatogr A 2010; 1218:380-6. [PMID: 21185031 DOI: 10.1016/j.chroma.2010.12.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Revised: 11/29/2010] [Accepted: 12/02/2010] [Indexed: 10/18/2022]
Abstract
A simple and novel speciation method for the determination of volatile organic compounds of selenium (dimethylselenide (DMSe) and dimethyldiselenide (DMDSe) has been developed using a headspace hollow fiber protected liquid-phase microextraction (HS-HF-LPME) combined with capillary gas chromatography-mass spectrometry (GC-MS). The organic solvent impregnated in the pores and filled inside the porous hollow fiber membrane was used as an extraction interface in the HS-HF-LPME of the compounds. The effect of different variables on the extraction efficiency was studied simultaneously using an experimental design. The variables of interest in the HS-HF-LPME were sample volume, extraction time, temperature of sample solution, ionic strength, stirring rate and dwelling time. A Plackett-Burman design was performed for screening in order to determine the significant variables affecting the extraction efficiency. Then, the significant factors were optimized by a Box-Behnken design (BBD) and the response surface equations were derived. Under optimum conditions, preconcentration factors up to 1250 and 1170 were achieved for DMSe and DMDSe respectively. The detection limit and relative standard deviation (RSD) (n=5, c=50 μg L(-1)) for DMSe were 65 ng L(-1) and 4.8%, respectively. They were also obtained for DMDSe as 57 ng L(-1) and 3.9%, respectively. The developed technique was found to be applicable to spiked environmental and biological samples.
Collapse
Affiliation(s)
- Ensieh Ghasemi
- Department of Chemistry, Faculty of Science, Shahid Beheshti University, G.C., Evin, Tehran, Iran
| | | | | |
Collapse
|
15
|
Łukaszczyk L, Żyrnicki W. Speciation analysis of Sb(III) and Sb(V) in antileishmaniotic drug using Dowex 1×4 resin from hydrochloric acid solution. J Pharm Biomed Anal 2010; 52:747-51. [DOI: 10.1016/j.jpba.2010.02.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2009] [Revised: 02/05/2010] [Accepted: 02/06/2010] [Indexed: 11/16/2022]
|
16
|
Bennett WW, Teasdale PR, Panther JG, Welsh DT, Jolley DF. New Diffusive Gradients in a Thin Film Technique for Measuring Inorganic Arsenic and Selenium(IV) Using a Titanium Dioxide Based Adsorbent. Anal Chem 2010; 82:7401-7. [DOI: 10.1021/ac101543p] [Citation(s) in RCA: 112] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- William W. Bennett
- Environmental Futures Centre, Griffith University, Gold Coast campus, Queensland 4222, Australia, and School of Chemistry, University of Wollongong, New South Wales 2522, Australia
| | - Peter R. Teasdale
- Environmental Futures Centre, Griffith University, Gold Coast campus, Queensland 4222, Australia, and School of Chemistry, University of Wollongong, New South Wales 2522, Australia
| | - Jared G. Panther
- Environmental Futures Centre, Griffith University, Gold Coast campus, Queensland 4222, Australia, and School of Chemistry, University of Wollongong, New South Wales 2522, Australia
| | - David T. Welsh
- Environmental Futures Centre, Griffith University, Gold Coast campus, Queensland 4222, Australia, and School of Chemistry, University of Wollongong, New South Wales 2522, Australia
| | - Dianne F. Jolley
- Environmental Futures Centre, Griffith University, Gold Coast campus, Queensland 4222, Australia, and School of Chemistry, University of Wollongong, New South Wales 2522, Australia
| |
Collapse
|
17
|
Bidari A, Hemmatkhah P, Jafarvand S, Milani Hosseini MR, Assadi Y. Selenium analysis in water samples by dispersive liquid-liquid microextraction based on piazselenol formation and GC–ECD. Mikrochim Acta 2008. [DOI: 10.1007/s00604-008-0003-8] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
18
|
Lin TS. Inorganic selenium speciation in groundwaters by solid phase extraction on Dowex 1X2. JOURNAL OF HAZARDOUS MATERIALS 2007; 149:80-5. [PMID: 17459575 DOI: 10.1016/j.jhazmat.2007.03.050] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2006] [Revised: 03/15/2007] [Accepted: 03/15/2007] [Indexed: 05/15/2023]
Abstract
A Dowex 1X2 resin separation technique followed by analysis with atomic absorption spectroscopy was evaluated for the study of inorganic selenium speciation in groundwaters. After Se(IV) and Se(VI) were retained on the resin column, Se(IV) and Se(VI) were eluted out by 0.1 and 1M nitric acid solutions. The method detection limit was 5.6 ng/L for both Se(IV) and Se(VI). Analysis of synthetic solutions consistently yielded more than 90% recovery of these two selenium forms with negligible cross-contamination. The results of spiked well waters show that this method can be applied at ultra-trace level of Se in groundwater and the interference of chloride ion can be neglected. Water samples collected from the monitoring wells in the Science-based Industrial Park, Hsin-Chu, Taiwan, were analyzed. Average dissolved selenium concentrations were 32.1+/-17.6 ng/L. The proportion of Se(VI) to the total dissolved selenium ranged from 47.6 to 61.2% and an average of 53.8% in water samples analyzed.
Collapse
Affiliation(s)
- Tser-Sheng Lin
- Department of Environmental Engineering and Health, Yuanpei University, 306 Yuanpei Street, Hsinchu City 300, Taiwan.
| |
Collapse
|
19
|
DRC™ ICP-MS coupled with automated flow injection system with anion exchange minicolumns for determination of selenium compounds in water samples. Talanta 2007; 73:352-7. [DOI: 10.1016/j.talanta.2007.03.054] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2006] [Revised: 03/27/2007] [Accepted: 03/27/2007] [Indexed: 11/23/2022]
|
20
|
Campillo N, Peñalver R, Hernández-Córdoba M, Pérez-Sirvent C, Martínez-Sánchez MJ. Comparison of two derivatizing agents for the simultaneous determination of selenite and organoselenium species by gas chromatography and atomic emission detection after preconcentration using solid-phase microextraction. J Chromatogr A 2007; 1165:191-9. [PMID: 17692323 DOI: 10.1016/j.chroma.2007.07.064] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2007] [Revised: 07/23/2007] [Accepted: 07/26/2007] [Indexed: 11/15/2022]
Abstract
Two methods for the simultaneous determination of selenite and two organoselenium compounds, dimethylselenide (DMSe) and dimethyldiselenide (DMDSe), are proposed. Both methods involve sample preconcentration by solid-phase microextraction (SPME) and capillary gas chromatography coupled to atomic emission detection (GC-AED). The main difference between the methods is the derivatizing agent used to complex the inorganic species: sodium tetraethylborate and 4,5-dichloro-1,2-phenylenediamine. The parameters affecting the derivatization and preconcentration steps, chromatographic separation as well as detection of the compounds were optimized. Direct immersion (DI) mode and a relatively long extraction time were selected for the method involving the formation of the piazselenol complex, better sensitivity being achieved for the three analytes under study. In this case, detection limits ranged between 3 and 25 ng L(-1), depending on the compound. Headspace mode (HS) and extraction times of 20 min were selected for the method involving tetraalkylborate, and detection limits of between 7.3 and 55 ng L(-1) were obtained. DMSe and Se(IV) were found in several of the water samples analyzed at concentrations of 0.07-1.0 ng mL(-1).
Collapse
Affiliation(s)
- Natalia Campillo
- Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, E-30071 Murcia, Spain
| | | | | | | | | |
Collapse
|
21
|
Campillo N, Aguinaga N, Viñas P, López-García I, Hernández-Córdoba M. Gas chromatography with atomic emission detection for dimethylselenide and dimethyldiselenide determination in waters and plant materials using a purge-and-trap preconcentration system. J Chromatogr A 2005; 1095:138-44. [PMID: 16275294 DOI: 10.1016/j.chroma.2005.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2005] [Revised: 07/25/2005] [Accepted: 08/01/2005] [Indexed: 10/25/2022]
Abstract
Dimethylselenide (DMSe) and dimethyldiselenide (DMDSe) were determined in plant and water samples by capillary gas chromatography using microwave induced-plasma atomic emission spectrometry for detection. The analytes were leached from the solid samples into methanol by using an ultrasonic probe, and a portion of the extract was preconcentrated by means of a purge-and-trap system before being chromatographed. The analytes were directly purged from the water samples in the presence of 6% (v/v) methanol. Element-specific detection and quantification was carried out by monitoring the selenium (196 nm) emission line. Calibration curves were obtained by plotting peak area versus concentration and the correlation coefficients for linear calibration were 0.9999 for both analytes. Detection limits of 0.8 and 1.1 ng l(-1) were obtained for DMSe and DMDSe, respectively, for water samples. For plant materials, the detection limits calculated for 0.5 g samples were 0.3 and 0.4 ng g(-1) for DMSe and DMDSe, respectively. Concentration levels of DMSe ranging from 1.2 to 4.2 ng g(-1) were found in some of the plant materials analyzed. No DMDSe was found in any of the samples. The accuracy of the method was checked by analyzing different spiked water and plant samples.
Collapse
Affiliation(s)
- Natalia Campillo
- Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, Spain
| | | | | | | | | |
Collapse
|
22
|
Modern preconcentration methods for the determination of selenium species in environmental water samples. Trends Analyt Chem 2004. [DOI: 10.1016/s0165-9936(04)00736-8] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
23
|
Sample preparation for speciation of selenium. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0166-526x(03)41032-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
24
|
Camel V. Solid-phase extraction. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0166-526x(03)41014-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
|
25
|
Bueno M, Potin-Gautier M. Solid-phase extraction for the simultaneous preconcentration of organic (selenocystine) and inorganic [Se(IV), Se(VI)] selenium in natural waters. J Chromatogr A 2002; 963:185-93. [PMID: 12187969 DOI: 10.1016/s0021-9673(02)00125-5] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This paper describes the combined use of a new preconcentration method using the Amberlite IRA-743 resin and high-performance liquid chromatography coupled to inductively coupled plasma mass spectrometry to determine simultaneously inorganic and organic selenium species in aquatic systems. The developed enrichment procedure, whose accuracy has been checked by recovery tests, is suitable for selenium speciation at environmental levels of 10 ng (Se) l(-1). The method has been applied to mineral and freshwater samples.
Collapse
Affiliation(s)
- Maïté Bueno
- Laboratoire de Chimie Analytique, Bio-Inorganique et Environnement, Université de Pau et des Pays de l'Adour, UMR CNRS 5034, Helioparc, Pau, France.
| | | |
Collapse
|
26
|
Sladkov V, Bolyos A, David F. Modified Square-Wave Cathodic Stripping Voltammetry for Determination of Se(IV) at Trace and Ultratrace Levels. ELECTROANAL 2002. [DOI: 10.1002/1521-4109(200201)14:2<128::aid-elan128>3.0.co;2-e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
27
|
Gómez-Riza JL, Morales E, Giráldez I, Sánchez-Rodas D, Velasco A. Sample treatment in chromatography-based speciation of organometallic pollutants. J Chromatogr A 2001; 938:211-24. [PMID: 11771840 DOI: 10.1016/s0021-9673(01)01103-7] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Speciation analysis is nowadays performed routinely in many laboratories to control the quality of the environment, food and health. Chemical speciation analyses generally include the study of different oxidation state of elements or individual organometallic compounds. The determination of the different chemical forms of elements is still an analytical challenge, since they are often unstable and concentrations in different matrices of interest are in the microg l(-1) or even in the ng l(-1) range (e.g., estuarine waters) or ng g(-1) in sediments and biological tissues. For this reason, sensitive and selective analytical atomic techniques are being used as available detectors for speciation, generally coupled with chromatography for the time-resolved introduction of analytes into the atomic spectrometer. The complexity of these instrumental couplings has a straightforward consequence on the duration of the analysis, but sample preparation to separate and transfer the chemical species present in the sample into a solution to be accepted readily by a chromatographic column is the more critical step of total analysis, and demands considerable operator skills and time cost. Traditionally, liquid-liquid extraction has been employed for sample treatment with serious disadvantages, such as consumption, disposal and long-term exposure to organic solvent. In addition, they are usually cumbersome and time-consuming. Therefore, the introduction of new reagents such as sodium tetraethylborate for the simultaneous derivatization of several elements has been proposed. Other possibilities are based in the implementation of techniques for efficient and accelerated isolation of species from the sample matrix. This is the case for microwave-assisted extraction, solid-phase extraction and microextraction, supercritical fluid extraction or pressurized liquid extraction, which offer new possibilities in species treatment, and the advantages of a drastic reduction of the extraction time and the embodiment into on-line flow analysis systems. This new generation of treatment techniques constitutes a good choice as fast extraction methods for feasible species-selective analysis of organometallic compounds under the picogram level, that can be used for national regulatory agencies, governmental and industrial quality control laboratories, and consequently, for manufacturers of analytical instrumentation.
Collapse
Affiliation(s)
- J L Gómez-Riza
- Departamento de Química y Ciencia de los Materiales, Escuela Politécnica Superior, Universidad de Huelva, Palos de la Frontera, Spain.
| | | | | | | | | |
Collapse
|
28
|
Relation of sorption behavior of agricultural chemicals in solid-phase extraction with their n-octanol/water partition coefficients evaluated by high-performance liquid chromatography (HPLC). Anal Chim Acta 2001. [DOI: 10.1016/s0003-2670(00)01250-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|