合并带流动注射分光光度法研究硫羟乳酸掩蔽性能

The Study of Masking Properties of Thiolactic Acid by Merging Zone Flow Injection Spectrophotometric Method

本文运用合并带流动注射分析技术，建立了以Ｙｂ３＋－ＸＯ显色体系为参考体系研究硫羟乳酸掩蔽性能的方法。在ｐＨ５．６硫羟乳酸能掩蔽Ｓｎ４＋、Ｂｉ３＋、Ｔｌ３＋、Ｈｇ２＋、Ｃｕ２＋、Ｃｒ３＋和Ｃｄ２＋，测定Ｙｂ３＋的线性范围为１．３６×１０－６～２．７２×１０－５ｍｏｌ／Ｌ，采样频率可达１２０次／ｈ。

A merging zone flow injection analytical technique has been first used in the study of masking properties of thiolactic acid (α MPA).It has been experimentally found that when Yb 3+ was determined at pH5.6 in a hexamine buffer by spectrophotometry with XO as the metallochromicindicator,α MPA can mask Sn 4+ 、Bi 3+ 、Tl 3+ 、Hg 2+ 、Cu 2+ 、Cr 3+ and Cd 2+ .With this method,the linear range of Yb 3+ was found to be 1.36×10 -6 ～2 72×10 -5 mol/L,and the sampling frequency reached 120/h.