Title: Simple and Highly Sensitive Spectrophotometric Flow Injection Method for the Determination of Iodate in Iodized Salt
Abstract: A simple and rapid flow injection (FI) spectrophotometric method is newly proposed for the determination of iodate in iodized salt. The method is based on the oxidation of 2-Chloro-10-[3-(4-methyl-1-piperazinyl) propyl] phenothiazine maleate (prochlorperazine / PCP) by iodate in acidic medium to form a red product: the increase in absorbance of the oxidation product is detected at 525 nm. Various chemical and physical experimental variables of the FI method were optimized, and the effect of interfering ions was also examined. Under the optimal conditions, iodate can be determined in the range of 1x10 -6 to 3x10 -5 mol l -1 with high precision (RSD=0.1% at 8x10 -6 mol l -1 of iodate, n=15). The detection limit (S/N=3) of the method was down to 8.5x10 -8 mol l -1 . The proposed method was validated against the FI with I3 - -starch reaction and the conventional titration method: the results obtained for three methods were statistically analyzed by the analysis of variance (ANOVA). It was found that there is no significant difference among these methods at 95% confidence. The method was applied to the determination of iodate in iodized salt.
Publication Year: 2006
Publication Date: 2006-06-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot