Determination of chloride ion concentration in natural and waste waters by flow-injection analysis with a silver chloranilate reaction column

✍ Scribed by Fumio Sagara; Tetsuya Tsuji; Isao Yoshida; Daido Ishii; Keihei Ueno

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 570 KB
• Volume: 270
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(92)80110-s

✦ Synopsis

The concentration of chloride ions in natural and waste waters was determined by a flow-injection method using a column packed with silver chloranilate powder. Ethanol-water-0.1 M sodium acetate buffer (pH 5.57) (5 + 4 + 1, v/v/v) was used as the carrier at a flow-rate of 2 ml min-1. The chloranilate ion concentration, which corresponds to the chloride ion concentration, in the carrier from the reaction column was monitored by a spectrophotometric detector at 530 nm. Interferences from multi-charged cations were eliminated with the combined use of a cation-exchange column inserted in the upper stream of the reaction column. Interferences from anions were found to be negligible. The concentration of chloride ions in natural and waste waters (1-20/zg m1-1) could be determined rapidly (one sample per 2 min) with high reproducibility. The results agreed well with those obtained by the standard manual method.