Quantitative determination of paraquat in meconium by sodium borohydride-nickel chloride chemical reduction and gas chromatography/mass spectrometry (GC/MS) |
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Authors: | Posecion Norberto C Ostrea Enrique M Bielawski Dawn M |
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Institution: | Department of Pediatrics, School of Medicine, Wayne State University, 421 East Canfield St., Detroit, MI 48201, USA. |
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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 0.0156microg/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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