Derivatization of GSSG (cas 121-24-4) by pHMB in alkaline media. Determination of oxidized glutathione in blood

Add time:09/24/2019    Source:sciencedirect.com

Chromatographic determination of glutathione disulfide (GSSG (cas 121-24-4)) without any preliminary reduction has been presented using GSSG derivatization by p-hydroxymercuribenzoate (pHMB) in strong alkaline medium followed by the determination of GS–pHMB complex by reversed phase chromatography coupled to chemical vapour generation and atomic fluorescence detector (RPC–CVGAFS). A detection limit of 35 nM for GSSG (corresponding to 1.8 pmol) detected as GS–pHMB species was achieved based on a signal-to-noise ratio of 3 in buffer and in blood. The proposed method was applied to the determination of GSSG in whole blood and validated by the classical determination of GSSG by derivatization after reduction with dithiothreitol (DTT).

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