Gas Chromatography-Tandem Mass Spectrometry Verification of Sulfur Mustard Exposure in Humans through the Conversion of Protein Adducts to Free Sulfur Mustard.

Abstract:

:Exposures to sulfur mustard (HD; bis(2-chloroethyll) sulfide) are well-known to result in the formation of adducts with free aspartate and glutamate residues of plasma proteins (Lawrence, R. J., Smith, J. R., and Capacio, B. R. 2008 32, (1), 31-36). A modified version of the analytical method reported previously for the verification of HD exposure has been developed (Lawrence, R. J., Smith, J. R., and Capacio, B. R. 2008 32, (1), 31-36). The method reported herein involves the reaction of hydrochloric acid with HD-adducted plasma proteins, resulting in the simultaneous cleavage and conversion of the adduct to free HD. A water scavenger, 2,2-dimethoxypropane, was added to the mixture to increase the reaction yield. Deuterated (d8) thiodiglycol was added as an internal standard and underwent conversion to deuterated sulfur mustard. The analytes were isolated by hexane liquid-liquid extraction and subsequently analyzed by gas chromatography tandem mass spectrometry (GC-MS-MS). An interday and intraday study was performed to evaluate the accuracy and precision of the method. Individual calibration curves with quality control (QC) standards were prepared on 5 days, and a calibration curve with five sets of QCs was prepared on a single day. All results were within the acceptable limits of the validation criteria. Linearity, limit of detection, and limit of quantitation were also verified for each calibration curve. This highly sensitive (pg/mL limit of detection) method can be used for rapid analysis of a definitive marker of sulfur mustard exposure.

journal_name

Chem Res Toxicol

authors

Young SA,Capacio BR

doi

10.1021/acs.chemrestox.0c00134

subject

Has Abstract

pub_date

2020-07-20 00:00:00

pages

1941-1949

issue

7

eissn

0893-228X

issn

1520-5010

journal_volume

33

pub_type

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