基于孔雀石绿-次磷酸钠体系动力学分光光度法测定痕量钯

[Determination of trace palladium based on kinetic-spectrophotometry with malachite green-sodium hypophosphite system].

作者信息

Li Jian-guo, Qin Xiao-feng, Wei Yong-qian

机构信息

Department of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215006, China.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2002 Feb;22(1):110-2.

PMID:12940043

Abstract

A new kinetic-spectrophotometric method for the determination of trace amount of palladium has been proposed. It is based on the palladium catalysed discoloring reaction of malachite green reduced by sodium hypophosphite in phosphoric acid buffer solution (pH = 2.0). The linear range of determination of palladium is 0-10 microgram.L-1, the detection limit is 9.78 x 10(-11) g.mL-1. The method has been used for the determination of palladium in some catalyst with satisfactory results. The mechanism of the reaction has also been discussed.

摘要

提出了一种测定痕量钯的动力学分光光度新方法。该方法基于在磷酸缓冲溶液（pH = 2.0）中，钯催化次磷酸钠还原孔雀石绿的褪色反应。钯的测定线性范围为0 - 10微克·升⁻¹，检测限为9.78×10⁻¹¹克·毫升⁻¹。该方法已用于某些催化剂中钯的测定，结果令人满意。还讨论了反应机理。