摘要
研究了溴邻苯三酚红与重铬酸根的褪色反应,据此拟定了测定铬(Ⅵ)的简便快速分析方法,确定了这个新体系的最佳褪色条件。1.0～10.0μg/25 ml Cr(Ⅵ)服从比尔定律,摩尔吸光系数ε(?)=7.3×10~4。对反应机理进行了一定的探讨。对标准铬钢中的铬进行了测定,结果良好。
In this paper we studied the color fadingreaction of bromo-pyrogallol red(BPR)withCr_2O_7^(2-) anion and have proposed the method fordetermination of Cr(Ⅵ)based on the fadingreaction.Molar absorptivity is 7.3×10~4 Beer'slaw is obeyed from 1.0 to 10.0 μg in 25 ml.Wehave studied the mechanism of this reaction anddetermined Cr(Ⅵ)in samples,good resultshave been obtained.
出处
《化学试剂》
CAS
CSCD
北大核心
1990年第2期84-85,74,共3页
Chemical Reagents
