Analysis of glutathione and glutathione disulfide in human saliva using hydrophilic interaction chromatography with mass spectrometry

Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
Yusuke IwasakiHiroyuki Nakazawa

Abstract

A sensitive method for the determination of glutathione (GSH) and glutathione disulfide (GSSG) in human saliva was developed and validated. GSH was captured and stabilized by the addition of N-ethylmaleimide (NEM). Solid-phase extraction (SPE) using an Oasis MAX extraction cartridge was employed for sample preparation and analysis was performed on a Shimadzu LCMS-2010 A that was operated in the single ion monitoring mode using positive ion electrospray ionization (ESI) as the interface. The monitored ion for GSH-NEM was m/z 433 and that for GSSG was m/z 613. Chromatography was carried out on an Atlantis HILIC silica column (150 mm x 2.1 mm, 5 microm) with acetonitrile and formate buffer as the mobile phase at the flow rate of 0.2 ml/min. The calibration curve was linear over the range of 0.1-100 microM for GSH-NEM. The extraction recoveries of GSH-NEM spiked at concentrations of 25 and 50 microM were 97.1 and 104.4%, respectively. Similar results were obtained for GSSG. The newly developed hydrophilic interaction chromatography with mass spectrometry (HILIC/MS) method showed superior sensitivity for the determination of GSH and GSSG in human saliva samples.

References

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Jul 22, 2009·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Yusuke IwasakiHiroyuki Nakazawa

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