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- W2070182892 abstract "An EMIT-ETS™ d.a.u, immunoassay screening method for methadone in meconium and a gas chromatography-mass spectrometry (GC-MS) method for methadone and its metabolites including 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine (EDDP) and 2-ethyl-5-methyl-3,3-diphenylpyrroline (EMDP) in meconium were described. The GC-MS method showed good linearity (r2 ≥ 0.998) over a concentration range of 25–2000 ng/g with limits of detection of 10, 25, and 10 ng/g for methadone, EDDP, and EMDP, respectively, and a limit of quantitation of 25 ng/g for all three analytes. Fifty pooled meconium samples were screened using a cutoff of 200 ng/g, and all samples screened negative. GC-MS analysis of all samples showed four samples to contain methadone (35.2 to 79.9 ng/g), EDDP (28.5 to 557.2 ng/g), or both, with no detectable amount of EMDP. The negative results on the four specimens at the cutoff used may be explained by the fact that EMIT-ETS d.a.u. antibody for methadone was specific to the parent drug. The results point to the fact that immunoassays should be directed to EDDP for detection of prenatal exposure of methadone through analysis of meconium specimens." @default.
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- W2070182892 date "2001-01-01" @default.
- W2070182892 modified "2023-09-23" @default.
- W2070182892 title "Analysis of Methadone and its Metabolites in Meconium by Enzyme Immunoassay (EMIT®) and GC-MS" @default.
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- W2070182892 doi "https://doi.org/10.1093/jat/25.1.40" @default.
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