【摘要】 介绍了Ｐｄ２＋－Ｉ－－ＴＢＡＢ（四丁基溴化铵）三元缔合物萃取光度法测定钯的方法。该方法以Ｌ（＋）抗坏血酸作为掩蔽剂，干扰离子Ｃｕ２＋，Ｆｅ３＋的允许量均为２．５μｇ／ｍＬ，Ｐｄ２＋浓度为０～４μｇ／ｍＬ，完全符合比耳定律（萃取剂作参比），方法的相关摩尔吸光系数ε为２．０９×１０４Ｌ／（ｍｏｌ·ｃｍ），桑德尔灵敏度Ｓ为５．０７×１０－３μｇ／ｃｍ２。工作曲线的应用范围为１～４μｇ／ｍＬ。更多还原

【Abstract】  new sensitive extraction photometric method to determine palladium(II)by Pd2+ I-1 TBAB(Tetrabutylammonium bromide)　three primary coordination compound was presented .The L(+) ascorbic acid was used as shelting agent in this method. The effect of some co existing ions such as Cu2+ and Fe3+on the determination of Pd2+ was studied. The most permissible amount of Cu2+ and Fe3+ is the same: 2.5 μg/mL Beer’s law is obeyed in the concentration range of Pd(II)0-4.0 μg/mL (Extract agent as the reference solution).The calculated corresponding molar absorptivity ε is 2.09×104 L/(mol·cm) at 342 nm, the Sandell sensitivity S is 5.07×10-3 μg/cm2, Pd2+ can be accurately determined in the range between 1￣4.0 μg/mL更多还原