Simple Method for Determination of Sodium Hydrosulfite by Spectrophotometric Technique
Abstract
In this research, the samples preparation method for Sodium hydrosulfite analysis by spectrophotometric technique based on the decreasing absorbance signal decreased of copper sulfate and utilized with ultrasonic was studied. The optimum conditions were 1.0 M of copper sulfate, 0.15 M Sulfuric acid as catalyst, temperature of 70๐C, reaction time of 45 minute, and detected at 815 nm. Under optimum conditions, Calibration graph was in range of 0.2-1.0 g/L (R2 0.9949). The limit of detection and limit of quantification were 0.05 and 0.16 g/L, respectively. The relative standard deviations were 6.18 - 9.01 %. Percent recoveries were 93.0 - 103.1. The proposed method was applied to determination of sodium hydrosulfite in 3 types of food samples as bamboo shoots, bean sprouts, and chicken feet. The sodium hydrosulfite found in bean sprouts was 0.27 g/kg
Keywords: sodium hydrosulfite, spectrophotometry, copper sulfate
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