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- W2034150520 abstract "A method for the separation of the neurotoxic phenylphosphonothiaote esters; leptophos (O-4-bromo-2,5-dichlorophenyl O-methyl-phenylphosphonothioate), desbromo-leptophos (O-2,5-dichlorophenyl O-methyl phenylphosphonothioate), EPN (O-ethyl-O-4-nitrophenyl phenylphosphonothioate), cyanofenphos (O-ethyl-O-4-cyanophenyl phenylphosphonothioate), and EPBP (O-ethyl O-2,4-dichlorophenyl phenylphosphonothioate), from their possible degradation products by reverse-phase high-pressure liquid chromatography is described. Compounds were separated on a microparticulate RP-8 column using a gradient of 1 to 95% menthol in water (the initial solvent also contained 5% glacial acetic acid) in 30 min following a 10-min isocratic delay. Quantification was performed by measuring ultraviolet absorbance at 280 nm. Retention times and peak areas were highly reproducible for the 20 compounds analyzed. The relationship between peak area and amount injected was linear over at least a 100-fold range (0.1–10.0 μg) for the parent compounds as well as their oxygen analogs and phenolic products. The ultraviolet detection limits were ⋍0.01 μg for EPN and related compounds and ⋍0.1 μg for leptophos, cyanofenphos, EPBP, and related products. Using this method, separation and determination of the products of in vitro phenylphosphonothioate metabolism have been achieved." @default.
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- W2034150520 date "1980-12-01" @default.
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- W2034150520 title "High-pressure liquid chromatography of neurotoxic phenylphosphonothioate esters and related compounds" @default.
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- W2034150520 doi "https://doi.org/10.1016/0003-2697(80)90662-4" @default.
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