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- W247246336 abstract "Sulfonazo III {2, 7-Bis(ο-sulfophenylazo)-1, 8-dihydroxy-3, 6-naphthalene disulfonic acid} reacts with barium to form a blue complex in a weak acidic solution. The absorption maximum of the complex lies at 640 nm and the absorbances increase considerably with increasing the content of water miscible solvent, such as methanol, ethanol and acetone. This phenomenon was used to determine ethanol by FIA with spectrophotometric detection. An acetate buffer (0.01 M, pH 3.5) containing 1.0 × 10-4 M Sulfonazo III and 4.0 × 10-5 M barium ion was delivered as a reagent solution. A sample solution (180 μl) was injected into a carrier solution (distilled water). Both the reagent and carrier streams were pumped at a constant flow rate of 0.5 ml/min. A linear relationship between the peak heights and the ethanol concentrations was obtained up to 50 v/v% of ethanol. The relative standard deviation was 0.51 and 0.87% for the determination of 10 and 30 v/v% of ethanol, respectively (n = 5). The proposed method was applied to the measurement of ethanol content in alcoholic beverages. The results on distilled alcoholic beverages agreed well with certified values." @default.
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- W247246336 date "1990-01-01" @default.
- W247246336 modified "2023-10-18" @default.
- W247246336 title "Spectrophotometric FIA measurement of ethanol content in distilled alcoholic beverages using sulfonazo III-barium complex." @default.
- W247246336 cites W1542535136 @default.
- W247246336 doi "https://doi.org/10.2116/bunsekikagaku.39.10_597" @default.
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