摘要
在ｐＨ６．１～６．７的磷酸盐介质中，钯（Ⅱ）与二溴羟基苯基荧光酮－溴化十六烷基三甲铵于室温下反应，生成水溶性和稳定性皆佳的紫色三元配合物，最大吸收波长为６００ｎｍ，对比度为７０ｎｍ，表现摩尔吸光系数为９．４８×１０￣４Ｌ．ｍｏｌ￣（－１）’ｃｍ￣（－１），桑德尔灵敏度为１．１２×１０￣（－３）μｇ．ｃｍ￣（－２），钯含量在０～７．０μｇ／１０ｍＬ范围内服从比尔定律。据此提出了一个灵敏、简便分光光度法测定钯的新方法，用于合成试样和贵金属合金中微量钯的测定，结果满意。
A new spectrophotometric method forthe determination of microamounts of palla-dium(Ⅱ)has been proposed,In phosphatebuffer medium at pH6.1～6.7,Pd(Ⅱ)re-acts with 2,6,7-trihydroxy-9-(3,5-dibromo-4-hydroxy)phenylfluorone-3(DBHPF )andcetyltrimethylammonium bromide(CTMAB) to develop a stable , soluble com-plex. The complex has a maximum absorp-tion at 600nm,with the apparent molar ab-sorptivity of 9. 48 × 10￣4L·mol￣(-1)·cm￣(-1)。The molar ratio ofPd(Ⅱ) to DBHPF in thecomplex was estimated to be 1:2.The cali-bration curve is linear up to 7.0μg/10mLPd.The effect of other metal ions has alsobeen investigated.The method has been sat-isfactorily applied to the determination of Pdin synthetic samples and a metallurgicalproduct after interfering ions have been sep-arated by extraction with dimethyl glyoximeand chloroform in acidic medium
出处
《分析试验室》
CSCD
北大核心
1995年第5期18-21,共4页
Chinese Journal of Analysis Laboratory
关键词
钯
光度法
荧光酮
贵金属合金
Palladium determination
spectrophotometry
2
6
7-trihydroxy-9-(3
5-dibromo-4-hydroxy)phenylfluorone-3
