摘要
研究了偶氮氯膦Ｉ与钢铁中铬的显色反应，试验表明，以六次甲基四胺为缓冲溶液，铬（Ⅲ）与偶氮氯膦Ｉ能形成稳定的络合物，其最大吸收波长λｍａｘ＝５８０ｎｍ，表面摩尔吸光系数ε＝５．２×１０＾５，与偶氮氯膦Ｉ的络合比为１：１，用本法测定了几种合金中的铬含量，结果是令人满意的。
The colour reaction of chromium with chlorophosphonazo Ⅰ(CPA-Ⅰ)has been investigated.It is shown that in hexamethylenetetramine medium chromium can form a stable complex with CPA-Ⅰ and the ratio of the complex has been found to be 1:1.The maximum absorption of the complex is at 580nm and the apparent molar absorptivity is 5.2×10~5. Beer's law is obeyed in the rangt of 0-85μgCr/50ml.The method can be used for the determination of chromium in alloy steel with satisfactory results.
出处
《冶金分析》
CAS
CSCD
北大核心
1997年第1期21-23,共3页
Metallurgical Analysis
关键词
偶氮氯膦I
铬
光度法
合金钢
Chromium,Chlorophosphonazo I
Spectrophotometry
