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- W2068840152 abstract "Cefotaxime was derivatised with 1,2-naphthoquinone-4-sulphonate (NQS), extracted into solid-phase cartridges (C18) and detected using a UV–visible detection system. Optimum conditions for this new procedure were: hydrogencarbonate–carbonate buffer, pH 10.5, 5-min reaction time at 25°C and an NQS concentration of 7.1·10−3 mol l−1. The accuracy and the precision of the liquid–solid procedure were tested. The procedure was used to measure cefotaxime in pharmaceutical and urine samples. The results obtained were contrasted with those reported for a HPLC method for urine samples. The generalized H-point standard additions method was used to measure cefotaxime in urine samples." @default.
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- W2068840152 date "1998-10-01" @default.
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- W2068840152 title "New spectrophotometric procedure for determining cefotaxime based on derivatization with 1,2-naphthoquinone-4-sulphonate into solid-phase extraction cartridges — application to pharmaceutical and urine samples" @default.
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- W2068840152 doi "https://doi.org/10.1016/s0378-4347(98)00335-1" @default.
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