1
|
Felipe-Sotelo M, Carlosena A, Fernández E, López-Mahía P, Muniategui S, Prada D. Microwave-assisted extraction and ultrasonic slurry sampling procedures for cobalt determination in geological samples by electrothermal atomic absorption spectroscopy. Talanta 2012; 63:735-42. [PMID: 18969494 DOI: 10.1016/j.talanta.2003.12.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2003] [Revised: 11/21/2003] [Accepted: 12/18/2003] [Indexed: 11/17/2022]
Abstract
Slurry sampling is compared to microwave-assisted acid digestion for cobalt determination in soil/sediment samples by electrothermal atomic absorption spectrometry (ETAAS). Furnace temperature programs and appropriate amounts of three chemical modifiers were optimised in order to get the highest signals and good separations between the atomic and background signals. Using nitric acid (0.5% (v/v)) as liquid medium, no chemical modifier was needed. The detection limit, based on integrated absorbance, was 0.04mugg(-1) for digests and slurries. Within-batch precision and analytical recoveries were satisfactory for both procedures. Accuracy was tested by analysing a reference soil and a sediment from IRMM. The methods were further compared employing a set of roadside soils and estuarine sediments. As no significant differences (95% confidence) were found, practical analytical properties were suggested in order to select one of them.
Collapse
Affiliation(s)
- M Felipe-Sotelo
- Department of Analytical Chemistry, University of A Coruña, Campus da Zapateira s/n E-15071, A Coruña, Spain
| | | | | | | | | | | |
Collapse
|
2
|
Fernández-Varela R, Andrade J, Muniategui S, Prada D. Comparing the weathering patterns of six oils using 3-way generalized Procrustes rotation and matrix-augmentation principal components. Anal Chim Acta 2010; 683:84-91. [DOI: 10.1016/j.aca.2010.10.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Revised: 09/06/2010] [Accepted: 10/13/2010] [Indexed: 11/16/2022]
|
3
|
Fernández-Varela R, Andrade J, Muniategui S, Prada D. Selecting a reduced suite of diagnostic ratios calculated between petroleum biomarkers and polycyclic aromatic hydrocarbons to characterize a set of crude oils. J Chromatogr A 2010; 1217:8279-89. [DOI: 10.1016/j.chroma.2010.10.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Revised: 09/27/2010] [Accepted: 10/11/2010] [Indexed: 10/18/2022]
|
4
|
Muniategui S, Sancho MT, Pérez S, Huidobro F, Simal J. Algunos parámetros físico-químicos de la grasa del polen apícola. Grasas y Aceites 2010. [DOI: 10.3989/gya.1991.v42.i2.1263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
5
|
Muniategui S, Sancho MT, López J, Huidobro JF, Simal J. Separación de las clases de lípidos neutros de polen apícola mediante cromatografía líquida de alta resolución (HPLC). Grasas y Aceites 2010. [DOI: 10.3989/gya.1991.v42.i4.1233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
6
|
Muniategui S, Paseiro P, Simal J. Medida del grado de insaturación de aceites y grasas comestibles por espectroscopia infrarroja y su relación con el índice de yodo. Grasas y Aceites 2010. [DOI: 10.3989/gya.1992.v43.i1.1188] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
7
|
Fernández-Varela R, Andrade JM, Muniategui S, Prada D, Ramírez-Villalobos F. Identification of petroleum hydrocarbons using a reduced number of PAHs selected by Procrustes rotation. Mar Pollut Bull 2010; 60:526-535. [PMID: 20005532 DOI: 10.1016/j.marpolbul.2009.11.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2009] [Revised: 11/10/2009] [Accepted: 11/11/2009] [Indexed: 05/28/2023]
Abstract
Identifying petroleum-related products released into the environment is a complex and difficult task. To achieve this, polycyclic aromatic hydrocarbons (PAHs) are of outstanding importance nowadays. Despite traditional quantitative fingerprinting uses straightforward univariate statistical analyses to differentiate among oils and to assess their sources, a multivariate strategy based on Procrustes rotation (PR) was applied in this paper. The aim of PR is to select a reduced subset of PAHs still capable of performing a satisfactory identification of petroleum-related hydrocarbons. PR selected two subsets of three (C(2)-naphthalene, C(2)-dibenzothiophene and C(2)-phenanthrene) and five (C(1)-decahidronaphthalene, naphthalene, C(2)-phenanthrene, C(3)-phenanthrene and C(2)-fluoranthene) PAHs for each of the two datasets studied here. The classification abilities of each subset of PAHs were tested using principal components analysis, hierarchical cluster analysis and Kohonen neural networks and it was demonstrated that they unraveled the same patterns as the overall set of PAHs.
Collapse
Affiliation(s)
- R Fernández-Varela
- Department of Analytical Chemistry, University of A Coruña, Campus da Zapateira s/n, E-15071 A Coruña, Spain
| | | | | | | | | |
Collapse
|
8
|
Pérez-Caballero G, Andrade JM, Muniategui S, Prada D. Comparison of single-reflection near-infrared and attenuated total reflection mid-infrared spectroscopies to identify and monitor hydrocarbons spilled in the marine environment. Anal Bioanal Chem 2009; 395:2335-47. [DOI: 10.1007/s00216-009-3151-8] [Citation(s) in RCA: 10] [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] [Received: 07/15/2009] [Revised: 09/09/2009] [Accepted: 09/09/2009] [Indexed: 11/28/2022]
|
9
|
Fernández-Varela R, Andrade JM, Muniategui S, Prada D, Ramírez-Villalobos F. The comparison of two heavy fuel oils in composition and weathering pattern, based on IR, GC-FID and GC-MS analyses: application to the Prestige wreackage. Water Res 2009; 43:1015-1026. [PMID: 19091372 DOI: 10.1016/j.watres.2008.11.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2008] [Revised: 11/20/2008] [Accepted: 11/28/2008] [Indexed: 05/27/2023]
Abstract
This paper compares the weathering patterns of two similar fuel oils: a fuel oil spilled after a ship accident (Prestige-Nassau, off the Galician coast -NW Spain-) and a fuel designed to cope with the numerous quests for samples to carry out scientific studies (IFO). Comparative studies were made to evaluate the capability of common fingerprinting analytical techniques to differentiate the fuels, as well as their capabilities to monitor their weathering. The two products were spilled under controlled conditions during ca. four months to assess how they evolved on time. Mid-IR spectrometry and gas chromatography (flame ionization and mass spectrometry detectors) were used. IR indexes related to total aromaticity, type of substituents (branched or linear chains) and degree of aromatic substitution reflected well the differences between the fuels during weathering. Regarding the chromatographic measurements, the n-alkanes became highly reduced for both fuel oils and it was found that the PAHs of the synthetic fuel (IFO) were more resistant to weathering. Regarding biomarkers, the different profiles of the steranes, diasteranes and triaromatic steroids allowed for a simple differentiation amongst the two products. The %D2/P2 ratio differentiated both products whereas the %N3/P2 one ordered the samples according to the extent of their weathering.
Collapse
Affiliation(s)
- R Fernández-Varela
- Department of Analytical Chemistry, University of A Coruña, Campus da Zapateira s/n, E-15071, A Coruña, Spain
| | | | | | | | | |
Collapse
|
10
|
Fernández-Varela R, Andrade JM, Muniategui S, Prada D, Ramírez-Villalobos F. Identification of fuel samples from the Prestige wreckage by pattern recognition methods. Mar Pollut Bull 2008; 56:335-347. [PMID: 18054966 DOI: 10.1016/j.marpolbul.2007.10.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2007] [Revised: 09/26/2007] [Accepted: 10/23/2007] [Indexed: 05/25/2023]
Abstract
A set of 34 worldwide crude oils, 12 distilled products (kerosene, gas oils, and fuel oils) and 45 oil samples taken from several Galician beaches (NW Spain) after the wreckage of the Prestige tanker off the Galician coast was studied. Gas chromatography with flame ionization detection was combined with chemometric multivariate pattern recognition methods (principal components analysis, cluster analysis and Kohonen neural networks) to differentiate and characterize the Prestige fuel oil. All multivariate studies differentiated between several groups of crude oils, fuel oils, distilled products, and samples belonging to the Prestige's wreck and samples from other illegal discharges. In addition, a reduced set of 13 n-alkanes out of 36, were statistically selected by Procrustes Rotation to cope with the main patterns in the datasets. These variables retained the most important characteristics of the data set and lead to a fast and cheap analytical screening methodology.
Collapse
Affiliation(s)
- R Fernández-Varela
- Department of Analytical Chemistry, University of A Coruña, A Coruña, Spain
| | | | | | | | | |
Collapse
|
11
|
Andrade J, Ares J, García R, Presa J, Rodríguez S, Piñeiro-Iglesias M, López-Mahía P, Muniategui S, Prada D. Development of a web-based support system for both homogeneous and heterogeneous air quality control networks: process and product. Environ Monit Assess 2007; 133:139-48. [PMID: 17295109 DOI: 10.1007/s10661-006-9567-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2006] [Accepted: 10/30/2006] [Indexed: 05/13/2023]
Abstract
The Environmental Laboratories Automation Software System or PALMA (Spanish abbreviation) was developed by a multidisciplinary team in order to support the main tasks of heterogeneous air quality control networks. The software process for PALMA development, which can be perfectly applied to similar multidisciplinary projects, was (a) well-defined, (b) arranged between environmental technicians and informatics, (c) based on quality guides, and (d) clearly user-centred. Moreover, it introduces some interesting advantages with regard to the classical step-by-step approaches. PALMA is a web-based system that allows 'off-line' and automated telematic data acquisition from distributed inmission stations belonging not only to homogeneous but also to heterogeneous air quality control networks. It provides graphic and tabular representations for a comprehensive and centralised analysis of acquired data, and considers the daily work that is associated with such networks: validation of the acquired data, alerts with regard to (periodical) tasks (e.g., analysers verification), downloading of files with environmental information (e.g., dust forecasts), etc. The implantation of PALMA has provided qualitative and quantitative improvements in the work performed by the people in charge of the considered control network.
Collapse
Affiliation(s)
- J Andrade
- Department of Information and Communications Technologies, University of A Coruña, Campus Elviña s/n, A Coruña 15071, Spain
| | | | | | | | | | | | | | | | | |
Collapse
|
12
|
González JJ, Viñas L, Franco MA, Fumega J, Soriano JA, Grueiro G, Muniategui S, López-Mahía P, Prada D, Bayona JM, Alzaga R, Albaigés J. Spatial and temporal distribution of dissolved/dispersed aromatic hydrocarbons in seawater in the area affected by the Prestige oil spill. Mar Pollut Bull 2006; 53:250-9. [PMID: 16274705 DOI: 10.1016/j.marpolbul.2005.09.039] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Seawater samples collected at three depths from 68 stations along the Northern Spanish coast were analysed for dissolved/dispersed petroleum aromatic hydrocarbons by UV-fluorescence and for 25 individual compounds by GC-MS. Sampling was performed in December 2002, just after the Prestige oil spill, and in February-March and September 2003. Higher concentrations of total aromatic hydrocarbons were found at all depths in the samples collected during December 2002 off the Galicia coast, with levels ranging between 0.19 and 28.8 microg/L eq. oil (0.1-4.8 microg/L chrysene eq.). These values decreased in the following cruises, till <0.05-2.86 microg/L oil eq. (av. 0.23 microg/L chrysene eq.) in September 2003, possibly representing the background levels for the region. However, in the Cantabrian coast they were still high at the surface in the March cruise, probably by the late arrival of the fuel-oil to this area. Some coastal hot spots were also identified, with values up to 29.2 microg/L fuel-oil eq., close to river mouths and urban areas. The individual PAH distributions in the December 2002 sampling off-Galicia were dominated by alkyl-naphthalene derivatives, consistently with the pattern distribution shown by the fuel-oil water accommodated fraction. The higher concentrations were found in the subsurface samples along the Costa da Morte, the area most heavily affected by the spill (av. 0.46 microg/L Sigma16 PAHs). The rest of the samples collected in other areas exhibited lower concentrations and a more even distribution of 2-4 ring PAHs, that ranged from 0.09 to 0.37 microg/L (av. 0.15 microg/L Sigma16 PAHs), with decreasing trends offshore and downward the water column. In September 2003, the values were rather uniform, averaging 0.09 microg/L (Sigma16 PAHs).
Collapse
Affiliation(s)
- J J González
- Instituto Español de Oceanografía, Centro Oceanográfico de Vigo, Cabo Estai-Canido, 36200 Vigo, Spain.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Felipe-Sotelo M, Carlosena A, Fernández E, López-Mahía P, Muniategui S, Prada D. Chemical modifiers for direct determination of cobalt in coal combustion residues by ultrasonic slurry-sampling-ETAAS. Fresenius J Anal Chem 2001; 371:1139-45. [PMID: 11798113 DOI: 10.1007/s00216-001-1102-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Five modifiers were tested for the direct determination of cobalt in coal fly ash and slag by ultrasonic slurry-sampling electrothermal atomic absorption spectrometry (USS-ETAAS). The furnace temperature programs and the appropriate amount for each modifier were optimized to get the highest signal and the best separation between the atomic and background signals. Nitric acid (0.5% v/v) was the most adequate chemical modifier for cobalt determination, selecting 1,450 degrees C and 2,100 degrees C as pyrolysis and atomization temperatures, respectively. This modifier also acts as liquid medium for the slurry simplifying the procedure. The remaining modifiers enhanced the background signal, totally overlapped with cobalt peak. The method optimized gave a limit of detection of 0.36 microg g(-1), a characteristic mass of 13 +/- 1 pg and an overall-method precision which is highly satisfactory (<7%, RSD). The method was validated by analyzing two certified coal fly ash materials, and satisfactory recoveries were obtained (83-90%) and no statistical differences were observed between the experimental and the certified cobalt concentrations. Additionally, certified sediment, soil and urban particulate matter were assayed; again good results were obtained. The developed methodology was used to determine cobalt in several coal combustion residues from five Spanish power plants.
Collapse
Affiliation(s)
- M Felipe-Sotelo
- Department of Analytical Chemistry, University of La Coruña, Spain
| | | | | | | | | | | |
Collapse
|
14
|
Garrido I, Soto RM, Carlosena A, López-Mahía P, Muniategui S, Prada D. FLAME ATOMIC ABSORPTION SPECTROMETRY WITH FLOW-INJECTION ON-LINE ADSORPTION PRECONCENTRATION USING A KNOTTED REACTOR FOR CADMIUM DETERMINATION IN AQUEOUS SAMPLES. ANAL LETT 2001. [DOI: 10.1081/al-100105359] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
15
|
Abstract
Invertase activity is a good parameter for evaluating honey freshness. Invertase activity evolution was determined on 57 fresh, unheated, commercially purchased Galician (northwestern Spain) floral honey samples. All honeys were stored in darkness at room temperature for up 24 months and analyzed each 6 months so as to determine the invertase activity evolution tendency for the first time. Invertase activity analysis was carried out according to Siegenthaler's method and in a simple assay, the latter showing a good precision (coefficient of variation between 0.35 and 0.66%). Initial invertase activity mean value was 163.9 (48.4-251.0) micromol of 4-nitrophenyl-alpha-D-glucopyranoside hydrolyzed/kg of honey/min. After application of the SPSS statistical package, the values of invertase activity showed five types of temporal behavior: exponential (56% of samples), linear (25% of samples), logarithmic (11% of samples), inverse (5% of samples), and quadratic (3% of samples). Linear regression equations were used to predict the invertase activity at 6, 12, 18, and 24 months from the initial Galician honeys' invertase activities; no statistical differences were found between experimental data and the activities calculated from the linear regression equations.
Collapse
Affiliation(s)
- M P Sánchez
- Facultad de Farmacia, Area de Nutrición y Bromatología, Universidad de Santiago, 15706 Santiago de Compostela (Galicia), Spain
| | | | | | | | | |
Collapse
|
16
|
Martínez-García ML, Carlosena A, López-Mahía P, Muniategui S, Prada D. Determination of mercury in estuarine sediments by flow injection-cold vapour atomic absorption spectrometry after microwave extraction. ACTA ACUST UNITED AC 1999. [DOI: 10.1051/analusis:1999107] [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: 11/15/2022]
|
17
|
Mato I, Huidobro JF, Cendón V, Muniategui S, Fernández-Muiño MA, Sancho MT. Enzymatic Determination of Citric Acid in Honey by Using Polyvinylpolypyrrolidone Clarification. J Agric Food Chem 1998; 46:141-144. [PMID: 10554209 DOI: 10.1021/jf970418p] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
To characterize honey types, a citric acid determination may be useful. A citric acid determination on honey was carried out with previous polyvinylpolypyrrolidone (PVPP) clarification followed by the Boehringer-Mannheim GmbH enzymatic test. The sample solution was prepared from 2 g of honey in 100 mL of Milli-Q water. A volume of 10 mL of this sample was clarified with PVPP stirring for 1 min and filtered. The enzymatic determination was measured spectrophotometrically at 340 nm, using citrate lyase, L-malate dehydrogenase, and L-lactate dehydrogenase. With these conditions, there were no observed interference effects. The proposed method improves precision [coefficient of variation (CV) between 0.26% and 1.60%] and recovery (between 98.0% and 100.9%) on the direct enzymatic analysis (% CV between 1.02 and 2.66 and recovery between 84.0% and 115.6%). Furthermore, the cost was reduced 70% using a microtest. The method was applied to 20 honeys of Galicia (northwestern Spain), and the results ranged between 44.2 and 827.0 mg of citric acid/kg of honey (mean = 192.9 mg/kg).
Collapse
Affiliation(s)
- I Mato
- Facultad de Farmacia, Área de Nutrición y Bromatología, Universidad de Santiago, Campus Universitario Sur, 15706 Santiago de Compostela (Galicia), Spain; Facultad de Ciencias, Área de Química Analítica, Universidad de La Coruña, Campus de la Zapateira s/n, 15071 La Coruña (Galicia), Spain; and Facultad de Ciencia y Tecnología de los Alimentos, Área de Nutrición y Bromatología, Universidad de Burgos, Plaza de Misael Bañuelos s/n, 09001 Burgos (Castilla y León), Spain
| | | | | | | | | | | |
Collapse
|
18
|
Carlosena A, Prada D, Andrade JM, López P, Muniategui S. Cadmium analysis in soil by microwave acid digestion and graphite furnace atomic absorption spectrometry. Anal Bioanal Chem 1996; 355:289-91. [PMID: 15045388 DOI: 10.1007/s0021663550289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/1995] [Revised: 10/12/1995] [Accepted: 11/07/1995] [Indexed: 11/28/2022]
Abstract
The need to determine micronutrients and toxic elements in soils has grown in recent years and cadmium is of special interest. A method has been developed for the determination of cadmium in soils based on a prior acid digestion of the samples with nitric acid in closed Teflon vessels, into a microwave over. The cadmium determination was carried out by graphite furnace atomic absorption spectrometry (GFAAS) with L'vov platform. Optimum operating conditions, analyte modifiers and matrix interferences have been investigated. The best matrix modifier was found to be ammonium dihydrogen phosphate. The interferences are greatly reduced under these operating conditions and calibration can be performed with simple aqueous solutions of the metal standard. The method is rapid and provides accurate and precise results that agree with certified values for two reference materials: BCR 141 (calcareous loam soil) and BCR 277 (estuarine sediment).
Collapse
Affiliation(s)
- A Carlosena
- Department of Analytical Chemistry, Faculty of Sciences, University of La Coruña, E-15071, La Coruña, Spain
| | | | | | | | | |
Collapse
|
19
|
Andrade JM, Prada D, Muniategui S, Lopez P. Prediction of FCC gasoline octane numbers using FT-MIR and PLS. Anal Bioanal Chem 1996; 355:723-5. [PMID: 15045354 DOI: 10.1007/s0021663550723] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/1995] [Accepted: 11/18/1995] [Indexed: 10/26/2022]
Abstract
A method for predicting "octane numbers" (RON and MON) in fluid catalytic cracking (FCC) gasolines is proposed. Using FT-MIR and PLS, improvements have been obtained in sample throughput, reduced delay times, accuracy (repeatability and reproducibility), amounts of samples and reagents and environmental working conditions when compared with current standard methods. A total number of 140 daily production samples were taken; and from there, a learning group was prepared (44 samples); a validation set (96 samples) was prepared, as well. Sample spectra were recorded from 4000 to 600 cm(-1) at 4 cm(-1) intervals (traditional sealed NaCl cells). The PLS technique was used in its two variants (1 and 2-block). Both provided similar results. Their predictive characteristics are very good: SEP(RON)=0.38; SEP(MON)=0.40; repeatability <0.1 O.N.; reproducibility <0.3 O.N. (SEP=Standard Error of Prediction).
Collapse
Affiliation(s)
- J M Andrade
- Department of Analytical Chemistry, University of La Coruña., Campus da Zapateira s/n, E-15071, La Coruña, Spain
| | | | | | | |
Collapse
|
20
|
Fernández-Muiño MA, Sancho MT, Muniategui S, Huidobro JF, Simal-Lozano J. Nonacaricide Pesticide Residues in Honey: Analytical Methods and Levels Found. J Food Prot 1995; 58:1271-1274. [PMID: 31137304 DOI: 10.4315/0362-028x-58.11.1271] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A bibliographic review on honey pollution with pesticides is presented. This paper reviews the methods set up for determining pesticide residues in honey samples as well as the pesticide residue levels found in European countries.
Collapse
Affiliation(s)
- M A Fernández-Muiño
- Area de Nutrición y Bromatología, Facultad de Ciencia y Tecnología de los Alimentos, Universidad de Burgos, Plaza de Misael Bañuelos s/n. 09001 Burgos (Castilla y León), Spain
| | - M T Sancho
- Area de Nutrición y Bromatología, Facultad de Ciencia y Tecnología de los Alimentos, Universidad de Burgos, Plaza de Misael Bañuelos s/n. 09001 Burgos (Castilla y León), Spain
| | - S Muniategui
- Area de Química Analítica, Facultad de Ciencias, Universidad de La Coruña, Campus de Zapateira s/n. La Coruña (Galicia), Spain
| | - J F Huidobro
- Area de Nutricón y Bromarología, Facultad de Farmacia, Universidad de Santiago de Compostela, 15706 Santiago de Compostela (Galicia), Spain
| | - J Simal-Lozano
- Area de Nutricón y Bromarología, Facultad de Farmacia, Universidad de Santiago de Compostela, 15706 Santiago de Compostela (Galicia), Spain
| |
Collapse
|
21
|
Abstract
A bibliographic review on the pollution of honey with acaricides is presented. This paper reviews methods for determining amitraz, bromopropylate, coumaphos, cymiazole, fluvalinate, malathion and phenothiazine residues in honey samples, as well as multiresidue methods. Acaricide residue levels found in European countries are also reviewed.
Collapse
Affiliation(s)
- M A Fernandez-Muiño
- Area de Nutrición y Bromatologí,a, Facultad de Ciencia y Tecnología de los Alimentos, Universidad de Burgos, Plaza de Misael Banuelos s/n, 09001 Burgos (Castilla y León), Spain
| | - M T Sancho
- Area de Nutrición y Bromatologí,a, Facultad de Ciencia y Tecnología de los Alimentos, Universidad de Burgos, Plaza de Misael Banuelos s/n, 09001 Burgos (Castilla y León), Spain
| | - S Muniategui
- Area de Química Analítica, Facultad de Ciencias, Universidad de La Coruña, Campus de Zapateira s/n, 15071 La Coruña (Galicia), Spain
| | - J F Huidobro
- Area de Nutrición y Bromatología, Facultad de Farmacia, Universidad de Santiago de Compostela, 15706 Santiago de Compostela (Galicia), Spain
| | - J Simal-Lozano
- Area de Nutrición y Bromatología, Facultad de Farmacia, Universidad de Santiago de Compostela, 15706 Santiago de Compostela (Galicia), Spain
| |
Collapse
|
22
|
Andrade JM, Muniategui S, López P, Prada D. Costs, laboratory safety, productivity and faster research octane number and motor octane number determinations in industrial chemistry laboratories. Analyst 1995. [DOI: 10.1039/an9952000249] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
23
|
|