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- W2077456437 abstract "A sensitive reduction peak of verapamil is obtained by adsorptive stripping voltammetry in 0.01 M phosphate (pH 7.4) at an accumulation time of 30 s. The peak potential is -1.81 V (vs. Ag/AgCl). The peak current is directly proportional to the concentration of verapamil (1x10(-8)-1x10(-6) M), with a 3sigma detection limit of 5x10(-10) M (0.246 ng/ml). The R.S.D. at the 1x10(-7) M level is 1.8%. The interference of some metal ions, and some amino acids, and the application of the method to analysis of urine, and pharmaceutical formulations are described. The method is simple (no extraction), rapid (30 s accumulation time), sensitive (the detection limit of verapamil is 0.491 ng/ml), reproducible(within day R.S.D. of 1.28-1.8%), and suitable for routine analysis of verapamil, urine, and pharmaceutical formulation." @default.
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- W2077456437 date "2002-11-01" @default.
- W2077456437 modified "2023-10-01" @default.
- W2077456437 title "Determination of verapamil by adsorptive stripping voltammetry in urine and pharmaceutical formulations" @default.
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- W2077456437 doi "https://doi.org/10.1016/s0731-7085(02)00322-9" @default.
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