电镀废水中微量铬（Ⅵ）、锌和镍的顺序流动注射光度分析

Sequential Determination of Trace Chromium(Ⅵ),Nickel and Zinc in Electroplating Waste Waters by Flow--injection Spectrophotometry.

以光度比色法为基础，采用流动注射分析技术，建立了水中铬（Ⅵ）、锌和镍的自动分析方法。通过实验将３种离子的测定综合在同一ＦＩＡ流路中完成，并使各种实验参数达到最佳化。该装置及方法的测定频率为６０样／ｈ，对格（Ⅵ）、锌和镍的检出限分别为０．１、０．２和０．３ｍｇ／Ｌ，测定的相对标准偏差约为１％，其灵敏度、准确度等指标均满足工业废水水质分析的要求。

An autmated flow--injection system is described for the sequential spectrophotometric determination of trace Cr (Ⅵ),Zn and Ni in waste waters. The sample analsis frequency is 60h-1 and the detection limit is 0. 1 mg/L(Cr),0. 2mg/L(Zn),and 0.3mg/L(Ni),respectively.The relative standard deviation is around 1 %. Results obtained with the proposed method are in a good agreement with the standard manual spectrophotometric methods.