Abstract
The objective of this study was to develop a procedure for the GC/MS assay of paraquat in meconium as a biomarker of fetal exposure to paraquat. The method involved a sodium borohydride-nickel chloride reduction procedure, liquid–liquid extraction of the perhydrogenated product, concentration, and GC/MS assay. The method demonstrated good overall recovery (102.56%) with %CV (inter-assay) of less than 13%, and a limit of detection of 0.0156 μg/g. Analysis of meconium samples from a study population in the Philippines ( n = 70) showed a 2.8% prevalence of fetal exposure to paraquat.
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