摘要
基于三溴偶氮氯膦可与钯在硫酸介质中形成易溶于水的蓝紫色络合物的这一显色反应,建立了测定微量钯的流动注射光度分析法。络合物的吸收波长为617nm。最佳显色反应条件是1.5～4.0mol/L H_2SO_4,0.020%的三溴偶氮氯膦溶液,反应温度80±1℃。大量的贵金属离子和常见的金属离子均不干扰测定。钯的线性范围为0～7.0μg/mL。检出限为0.1μg/mL 钯。用以不经分离直接测定二次阳极泥中的钯,结果良好。
2-(4-Chloro-2-phosphophenylazo)-7-(2,4,6-tri-bromophenylazo)-1,8-dihydroxy-3,6-naphthalenedisulfonic acid(CPA-TB)has been developed for thedetermination of palladium.The system involvedthe measurement of absorbances of palladiumcomplex with CPA-TB.The method is rapid,sensitive and selective.It has been applied to de-termine palladium in anode mud and chlorideresidue without preliminary separation,andsatisfactory results were achieved
出处
《化学试剂》
CAS
CSCD
北大核心
1991年第1期3-5,共3页
Chemical Reagents
基金
科学基金资助课题
