【摘要】 研究了Ｎ－庚基－Ｎ′－（对氨基苯磺酸钠）硫脲（ＨＰＴ）与钯（Ⅱ）的反应条件。结果表明：在ｐＨ４．８～５．８的ＨＡｃ－ＮａＡｃ介质中，并有溴化十六烷基三甲胺（ＣＴＭＡＢ）存在下，试剂ＨＰＴ与钯（Ⅱ）形成稳定的黄色配合物，其最大吸收波长为２９５．２ｎｍ，表观摩尔吸光系数为２．９８×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。钯（Ⅱ）浓度在０．０４～０．２８ｍｇ／Ｌ范围内符合比尔定律，相关系数ｒ＝０．９９８９。方法简便、快速、选择性好，用于催化剂、贫钯矿中微量钯的测定，结果满意。更多还原

【Abstract】 The reaction of Pd(Ⅱ) with a new reagent N heptyl N′ (sodium p aminobenzenesulfonate) thiourea(HPT) was studied by spectrophotometry.In the range of pH4.8～5 8,Pd(Ⅱ) forms a stable yellow complex with HPT in the presence of cetyltrimethylammonium bromide(CTMAB).Its apparent molar absorptivity is 2.98×10 5L·mol -1 ·cm -1 at the maximum absorption wavelength 295.2nm.Beer’s law is obeyed in the range of 0.04～0 28mg/L for Pd(Ⅱ).This method has been used for the determination of trace Pd(Ⅱ) in ores and catalyst with satisfactory results.更多还原