Total determination and quantitative speciation analysis of selenium in yeast and wheat flour by isotope dilution analysis ICP-MS

Huerta, Vanesa Díaz; Hinojosa‐Reyes, Laura; Marchante-Gayón, Juan Manuel; Sánchez, Marı́a Luisa Fernández; Sanz‐Medel, Alfredo

doi:10.1039/b305827a

Cited by 107 publications

(85 citation statements)

References 25 publications

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“…1,2 An inductively coupled plasma mass spectrometer (ICP-MS) is a trace-element detection method with unique analytical capabilities. Several procedures based on liquid chromatography (LC), [1][2][3][4][5][6][7][8][9][10] gas chromatography (GC) 11 and capillary electrophoresis (CE) [12][13][14][15][16] coupled with ICP-MS have been reported for selenium and arsenic speciation analysis. Coupling of LC to ICP-MS gained much attention due to its easiness of sample preparation, simplicity of the interface to the detector, availability of isotope ratio information and specificity of the signal intensity of the determined element.…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted Extraction and Ion Chromatography Dynamic Reaction Cell Inductively Coupled Plasma Mass Spectrometry for the Speciation Analysis of Arsenic and Selenium in Cereals

Tsai

Jiang

2011

ANAL. SCI.

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Section: Introductionmentioning

confidence: 99%

Microwave-assisted Extraction and Ion Chromatography Dynamic Reaction Cell Inductively Coupled Plasma Mass Spectrometry for the Speciation Analysis of Arsenic and Selenium in Cereals

Tsai

Jiang

2011

ANAL. SCI.

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“…Selenomethionine (SeMet) is generally the dominant Se species in such supplements and is less toxic than inorganic selenium, and possesses higher bioavailability. [8][9][10][11] Although the most frequently used procedures for the extraction of SeMet from yeast are based on enzymatic hydrolysis [8][9][10][11] with protease, proteinase K or a mixture of proteolytic enzymes, methanesulfonic acid has also been found efficient for this purpose, 12,13 as has cyanogen bromide in combination with use of SnCl 2 in 0.1 M HCl pretreatment. 14 However, incomplete degradation of proteins with cyanogen bromide has also been reported, 15 which may bias analytical results.…”

Section: Introductionmentioning

confidence: 99%

“…Gas chromatography (GC) and high performance liquid chromatography (HPLC) are currently the most commonly used separation techniques for determination of SeMet in combination with detection by flame photometry, 16 atomic emission, 17 mass spectrometry 12,14,[17][18][19] and inductively coupled plasma mass spectrometry (ICP-MS). [8][9][10][11][20][21][22][23][24] In particular, ICP-MS has been used as a sensitive and selective detector for speciation analysis for the past decade. In addition to its high sensitivity, large dynamic range and multi-element capability, isotope dilution (ID) calibration can also be implemented.…”

Section: Introductionmentioning

confidence: 99%

Determination of selenomethionine in yeast using CNBr derivatization and species specific isotope dilution GC ICP-MS and GC-MS

Yang

Sturgeon

Wolf

et al. 2004

J. Anal. At. Spectrom.

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Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Determination of selenomethionine in yeast using CNBr derivatization and species specific isotope dilution GC ICP-MS and GC-MS Yang, L.; Sturgeon, R.; Wolf, W. R.; Goldschmidt, R. J.; Mester, Z.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=8897067&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=8897067&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1039/b410543eJournal of Analytical Atomic Spectrometry, 19, 11, pp. 1448Spectrometry, 19, 11, pp. -1453Spectrometry, 19, 11, pp. , 2004 Determination of selenomethionine in yeast using CNBr derivatization and species specific isotope dilution GC ICP-MS and GC-MS Se ratios, respectively, in agreement with a value of 3417 AE 27 mgg À1 (one standard deviation, n = 6) obtained using ID GC-MS detection based on the ratio of 106/100 of SeCN + ion. The SeMet accounts for 67% of the total Se in the sample. A method detection limit (three standard deviations) of 0.9 mgg À1 was estimated for SeMet based on a 0.25 g subsample. Significantly lower concentrations of 2220 AE 7 and 2215 AE 9 mgg À1 (one standard deviation, n = 4) Se ratios, respectively, following digestion with 4 M methanesulfonic acid and derivatization with methyl chloroformate.

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“…The species-unspecific spiking mode would allow accurate quantification even with unknown composition and structure of the compounds if enriched species-specific standards are not available. [19][20][21] Here an isotope enriched solution is mixed on-line with the column eluent after the chromatographic separation and, as a consequence, isotopic equilibration between the separated element species and the Se enriched isotope spike is only obtained in the plasma of the ICP-MS. Previous works in our laboratory have shown the applicability of this IDA technique to the precise and accurate determination of selenium species in different biological materials including human serum, 19 yeast and wheat flour enzymatic extracts 20 and cod muscle.…”

Section: Introductionmentioning

confidence: 99%

Quantification of selenium species in petroleum refinery wastewaters using ion chromatography coupled to post-column isotope dilution analysis ICP-MS

Reyes

García-Ruiz

Tonietto

et al. 2009

J. Braz. Chem. Soc.

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A metodologia analítica de diluição isotópica (IDA) pós-coluna foi empregada para realizar ensaios de especiação quantitativa de selênio (Se) em amostras de efluentes industriais através do acoplamento da cromatografia de íons ao ICP-MS, contendo um sistema composto por uma célula de reação (ORS). As interferências ocasionadas pelos dímeros de argônio nos isótopos 78 Se e 80 Se foram suprimidas pressurizando-se a câmara do octapolo com 4 mL min -1 de hidrogênio. Selenito [Se (IV)], selenato [Se (VI)] e selenocianato [SeCN -] foram separados por cromatografia de íons (IC) utilizando eluição isocrática com 20 mmol L -1 Na 2 CO 3 /2 mmol L -1 NaHCO 3 . Após a separação, os íons carbonato presentes no eluente foram convertidos a CO 2 em linha por uma membrana supressora auto-regenerante, a fim de evitar a obstrução do nebulizador ou dos cones de interface do ICP-MS. Limites de detecção (3σ da flutuação da linha de base) de 0,18, 0,13 e 1,0 ng g -1 foram atingidos para Se (IV), Se (VI) e SeCN -, respectivamente. A quantificação do selênio, separadamente em cada espécie, foi executada empregando a análise de diluição isotópica (IDA) pós-coluna, adicionando de modo contínuo uma solução enriquecida com 77 Se ao efluente da coluna supressora. Finalmente, as razões entre os isótopos 78 Se/ 77 Se ou 80 Se/ 77 Se foram monitoradas e a concentração da espécie correspondente de selênio avaliada. A metodologia proposta foi aplicada com sucesso para o estudo de especiação quantitativa do selênio em efluentes de refinarias de petróleo.A post-column Isotope Dilution Analysis (IDA) methodology has been used to carry out the quantitative speciation of selenium (Se) in industrial wastewaters by ion chromatography coupled to ICP-MS with an octapole reaction system (ORS). The interfering argon dimers on the 78 Se and 80 Se isotopes were suppressed by pressurizing the octapole chamber with 4 mL min -1 of hydrogen. The inorganic Se species selenite [Se (IV)], selenate [Se (VI)] and selenocyanate [SeCN -] were separated by ion chromatography (IC) using isocratic elution with 20 mmol L -1 Na 2 CO 3 / 2 mmol L -1 NaHCO 3 as eluent. After the separation, the eluent carbonates were converted to CO 2 on-line by a membrane self-regenerating suppressor, in order to avoid clogging problems in the nebulizer or in the cones of the ICP-MS interface. Detection limits (as 3σ of the baseline noise) of 0.18, 0.13 and 1.0 ng g -1 were achieved for Se (IV), Se (VI) and SeCN -respectively. Quantification of selenium in each separated species was performed using post-column isotope dilution analysis by continuous mixing of an enriched 77 Se spike solution with the effluent from the suppressor column. Finally, the 78 Se/ 77 Se or 80 Se/ 77 Se isotope ratios were monitored and the concentration of the corresponding selenium species was evaluated. The proposed methodology has been successfully applied to study the quantitative speciation of selenium in petroleum refinery wastewaters.

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Total determination and quantitative speciation analysis of selenium in yeast and wheat flour by isotope dilution analysis ICP-MS

Cited by 107 publications

References 25 publications

Microwave-assisted Extraction and Ion Chromatography Dynamic Reaction Cell Inductively Coupled Plasma Mass Spectrometry for the Speciation Analysis of Arsenic and Selenium in Cereals

Microwave-assisted Extraction and Ion Chromatography Dynamic Reaction Cell Inductively Coupled Plasma Mass Spectrometry for the Speciation Analysis of Arsenic and Selenium in Cereals

Determination of selenomethionine in yeast using CNBr derivatization and species specific isotope dilution GC ICP-MS and GC-MS

Quantification of selenium species in petroleum refinery wastewaters using ion chromatography coupled to post-column isotope dilution analysis ICP-MS

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