摘要
本文研究了在适量镉存在下,PH9.0的硼砂缓冲介质中,α,β,γ,δ-四-(对-碘基苯)卟啉(TPPS_4)和铑的显色反应。其最大吸收波长位于417nm,表观摩尔吸光系数为5.9×10~5L·mol^(-1)·cm^(-1)。铑含量在0～0.25μg/ml范围内服从比尔定律。配合物的组成比为Rh:TPPS_4=1∶1。将拟定的方法应用于Rh_4/13X分子筛载体催化剂和RhCl_3制催化剂浸残液中铑的测定,获得满意的结果。
The reaction of α, β, γ, δ-tetrakis-(4-sulphophenyl) porphine (TPPS_4) with Rh (Ⅲ) in the presence of suitable amount of Cd (Ⅱ) at pH 8.0—10.0 after heating in boiling water bath for 10 min has been studied. A method for spectrophotometric determination of trace Rh (Ⅲ) with TPPS_4, CTMAB and Cd (Ⅱ) has been described. The molar ratio of Rh to TPPS_4 is 1∶1. The absorbance maximum is measured at 417 nm with the molar absorptivity being 5.9×10~5L·mol^(-1)·cm^(-1). Beers law is obeyed for Rh in the range 0—0.25μg/ml This method has been applied to determine Rh (Ⅲ) in the Rh_4/13X molecular sieve catalyst and in the remains of RhCl_3 soaker with satisfactory precision.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1989年第8期701-704,共4页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金
关键词
贵金属
卟啉
铑
分光光度法
CTMAB
Rhodium
Porphyrin
Cadmium
CTMAB
Spectrophotometry
Catalytic effect
