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- W1992457944 abstract "The oxidative behaviour of 4-chloro-5-sulfamylsalicyloyl-2′,6′-dimethylamilide (xipamide) was studied in aqueous alcoholic media (9:91 MeOH+H2O, pH 1–7.5) and two different ionic media (KNO3 and KCl) at carbon electrodes. The oxidation process has been shown to be irreversible and predominantly diffusion controlled over the entire pH range and in both media. A voltammetric method was developed at pH 2.5 (phosphate buffer) and 0.4 M KNO3 for the quantitative determination of xipamide. The peak current showed a linear relationship with concentration in the range 4.65 × 10−7 - 2.88 × 10−5 M with detection limits of 6.76 × 10−8 M (24 ppb) by differential pulse voltammetry and 3.94 × 10−7 M (140 ppb) by linear scan voltammetry, and a reproducibility (in terms of relative standard deviation) of 5.8% and 6.3% for 10 determinations of concentrations of 1.41 × 10−5 M and 7.05 × 10−8 M respectively. The method for xipamide was applied to assays of pharmaceuticals (Demiax 20 mg) and spiked urine samples." @default.
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- W1992457944 date "1993-09-01" @default.
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- W1992457944 title "Voltammetric study of the diuretic xipamide" @default.
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- W1992457944 doi "https://doi.org/10.1016/0302-4598(93)80020-u" @default.
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