流动注射分光光度法测定铁的研究

The Spectrophotometric Determination of Iron(Ⅲ)in Flow Injection Analysis

本文利用反向流动注射分析法（ｒＦＩＡ）对Ｆｅ（Ⅱ）－ＣＡＳ－ＴｒｉｔｏｎＸ－１００－ＨＤＭＡＡ显色体系进行了显色条件、流路参数等的优化研究。测得采样频率为９０次／小时，体系的测量波长为６６０ｎｍ，测量的线性范围为０～１．６μｇ／ｍｌＦｅ（Ⅱ），检测限为０．００２μｇ／ｍｌ。用本法测定了水质标样、油田注水、自来水样中的痕量铁，结果令人满意。

Colour conditions and flow path parameters have been optimized in Fe(Ⅲ)-CAS-Triton X-100-HDMAA system by reverse flow injection analysis(rFIA). The measuringwavelength is 660 nm. The linear range is 0-0.6 μg/ml iron(Ⅲ)with a detection limit of0.002μg/ml injection rate is 90/h. The amount of the total iron in standard water sample,the tap water in Beijng and the water filled in the oil well in Daqing oil field has been deter-mined with satisfactory results.