摘要
在 p H=3 .0～ 5.0 ,Cr( )与 EDTA和溴代十六烷基三甲基铵 ( CTMAB)生成紫红色三元络合物。其最大吸收峰在 560 nm,摩尔吸光系数 ε=6.4 5× 1 0 2 L.mol-1.cm-1,铬 ( )量在 0～ 2 2 0 μg/2 5ml范围内符合比尔定律 ,用于磷铁矿中铬的测定结果满意。
At PH 3.0～5.0,Chromium(Ⅲ) reacts with EDTA and CTMAB to form a purlish red complex. The calculated molar absorptivity is 6.45×10 2L.mol -1 .cm -1 . beer’s law is obeyed in 0～220μg/25ml for chromium(Ⅲ).It has been applied to the determination of Chromium(Ⅲ) in steel and the results obtained are satisfactory.
出处
《云南师范大学学报（自然科学版）》
2000年第5期72-73,共2页
Journal of Yunnan Normal University:Natural Sciences Edition
关键词
EDTA
铬
CTMAB
光度法
测定
ethylenediaminetetraacetic acid disodium salt
Chromiu(Ⅲ)
CTMAB
spectrophotometry
