摘要
本文研究了动力学法测定贵金属铑的新指示反应体系。本法测定铑的检测限为6.71×10^(-10)g/ml。log(Ao/A)与铑浓度呈线性的范围为0～6.0μg Rh/10ml。表观活化能为77.4kJ/mol。表观反应速度常数为7.36×10^(-4)/s。本法用于分子筛载体铑催化剂和铑电镀液中铑的测定,取得满意结果。
The catalytic kinetic spectrophotometry for the determination of rhodium with rhodamine B-hydrogen peroxide at pH 4. 5～5. 0 has been described. Factors influencing the ensitivity and interferences from model solutions are investigated. The linear relation between the log(A_0/A) and the concentration of Rh(Ⅱ) is found in the range of 0 to 6. 0 μg/l0ml, and the limit of detection is 6.71×10^(-10)g/ml. The recovery is 89.4～108.3%. The method has been applied to the determination of rhodium carried on molecular sieveand electrolytic solution of rhodium with good results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1991年第8期921-923,共3页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金资助课题
关键词
动力学
分光光度法
铑
Rhodium
Rhodamine B
Catalytic kinetic spectrophotometry
