【摘要】 在ｐＨ３．５的ＨＣｌ－ＮａＡｃ缓冲溶液中，钯与柠檬黄形成１∶２的配合物．在溴代十六烷基三甲铵（ＣＴＭＡＢ）存在下，配合物的最大吸收波长为５３１ｎｍ，ε为１．９×１０４Ｌ／（ｍｏｌ·ｃｍ）．采用１ｃｍ和３ｃｍ吸收池测定时，钯含量分别在０～１μｇ／ｍＬ和０～０．６μｇ／ｍＬ范围内服从比尔定律．方法检测限为０．０６８ｍｇ／Ｌ，重现性好，选择性高，适于合成矿样及钯催化剂中钯的测定更多还原

【Abstract】 The present paper covers an accurate and selective method for the determination of micro amounts of palladium with tartrazine and CTMAB in a medium of HCl NaAc of pH 3.5 . The complex of palladium with tartrazine has a maximum absorption at 531 nm in the presence of CTMAB. The molar ratio for Pd∶tartrazine is 1∶2. Beer’s law is obeyed in the range of 0￣1 μg/mL and 0￣0 6 μg/mL for 1 cm and 3 cm cells, respectively. The method has been applied to the determination of palladiumin in synthetic sample and palladium catalysts with satisfactory results.更多还原