Spectrophotometric flow determination of chlorine in water using a long pathlength optic cell and multicommutation

[摘要] A multicommuted method for determination of chlorine in water samples using a 100-cm cell was developed. In this method, orto-Tolidine reacts with chlorine and the product was monitored at 438 nm. The analytical curve for chlorine was linear in concentration range from 1.34x10-6 to 2.01x10-5 mol L-1 with a detection limit of 9.40x10-8 mol L-1. A sampling rate of 45 h-1 and a RSD of 1.0 % (n = 15) were obtained. The method was applied with success for chlorine determination in six water samples.

[学科分类] 化学（综合）

[关键词] flow analysis;chlorine;long pathlength spectrophotometry.