5－Br－PADAP作为配位滴定铅指示剂的研究

STUDIES ON 5-Br-PADAP AS METALLOCHROMIC INDICATOR FOR COMPLEXOMETRIC TITRATION OF LEAD

本文研究在ＰＨ５．５的六次甲基四胺缓冲体系中，以５－Ｂｒ－ＰＡＤＡＰ作为指示剂，用ＥＤＴＡ滴定铅精矿中铅含量。试验结果表明，终点变色敏锐，测定结果变异系数为０．２７％（ｎ＝５）。

This paper studied that lead content in ores were titrated with 5-k-PADAP indicator and EDTA titrant inhexaniethylenamine medium(PH=5.5).The results of experimentation show that the color change at end point is verysharp and the variation coefficient of determination result is 0.27%(n=5).