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- W1968659710 abstract "A simple, sensitive and specific spectrofluorimetric method has been developed for the determination of labetalol (LBT). The method is based on the reaction between LBT and ethylacetoacetate in the presence of sulphuric acid to give yellow fluorescent product with excitation wavelength of 312 nm and emission wavelength of 432 nm. The reaction conditions were studied and optimized. The fluorescence intensity-concentration plot is rectilinear over the range 1-15 microgram/ml with minimum detectability limit of 0.8 microgram/ml (2.16 x 10(-6) M). The proposed method was successfully applied to commercial tablets containing LBT, the percentage recoveries agreed well with those obtained using the official methods. Hydrochlorothiazide, which is frequently co-formulated with LBT did not interfere with the assay. The method was further extended to the in-vitro determination of LBT in spiked human urine samples. The percentage recovery was 101.50+/-6.18 (n=6). A proposal of the reaction pathway was postulated." @default.
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- W1968659710 date "2002-11-01" @default.
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- W1968659710 title "Spectrofluorometric determination of labetolol in pharmaceutical preparations and spiked human urine through the formation of coumarin derivative" @default.
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- W1968659710 doi "https://doi.org/10.1016/s0731-7085(02)00471-5" @default.
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