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LC–MS determination of oxidized and reduced glutathione in human dermis: A microdialysis study

LC–MS determination of oxidized and reduced glutathione in human dermis: A microdialysis study,10.1016/j.jchromb.2011.09.052,Journal of Chromatography

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LC–MS determination of oxidized and reduced glutathione in human dermis: A microdialysis study  
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A simple, highly selective, sensitive and reproducible liquid chromatography-electrospray ionization mass spectrometry method has been developed for the direct and simultaneous determination of reduced (GSH) and oxidized (GSSG) glutathione in microdialysis samples from human dermis. Chromatographic separation was carried out on an MODULO CART QS KROMASIL 5C18 (250mm×2mm×5μm) analytical column at a flow rate of 0.25ml/min. An isocratic mode was used and consisted of acidified water and acetonitrile (50/50, v/v). To improve the sensitivity, silver nitrate was added as post-column reagent. A trap mass spectrum was used equipped with an ESI interface. The limits of detection and quantification were respectively 0.12 and 0.4ng/ml for GSH and 0.2 and 0.5ng/ml for GSSG. Intra-day and inter-day accuracy and precision were determined and the variability was less than 6.2% (R.S.D.).
Journal: Journal of Chromatography B-analytical Technologies in The Biomedical and Life Sciences - J CHROMATOGR B , vol. 879, no. 30, pp. 3599-3606, 2011
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