【摘要】 介绍了Ｎ辛基Ｎ′（氨基对苯磺酸钠）硫脲（ＯＰＴ） 的合成方法。通过红外、紫外和元素分析等方法测试，确定了其组成和结构。并研究了该试剂与钯（Ⅱ）的显色反应，从而建立了光度法测定微量钯的新方法。在ｐＨ４．０～５５ 的ＨＡｃＮａＡｃ 缓冲体系中，Ｐｄ２＋ 和ＯＰＴ可形成一种稳定的１∶４ 的黄色水溶性配合物，配合物的最大吸收波长位于３０２４ｎｍ 处，表观摩尔吸光系数ε３０２．４ｎｍ ＝ １．３３×１０５Ｌ·ｍ ｏｌ－ １·ｃｍ － １，钯含量在０～１４２μｇ／２５ｍ Ｌ范围内服从比尔定律，相关系数ｒ＝ ０９９９６。该法已应用于阳极泥和矿石样品中钯的测定。更多还原

【Abstract】 The new reagent N octyl N′ (sodium p aminobenzenesulfonate) thiourea (OPT) was synthesized and characterized by elemental analysis,IR and UV spectra.The color reaction of OPT with palladium(Ⅱ) was also studied.In HAc NaAc buffer solution at pH4.0～5 5,Pd 2+ reacts with OPT to form a 1∶4 stable water solble complex with an apparent molar absorptivity of ε =1.33×10 5L·mol -1 ·cm -1 at 302.4nm.Beer’s law is obeyed in the range of 0～14.2μg per 25mL for palladium(Ⅱ),the correlation coefficient is 0.9996.The method has been applied satisfactorily to the determination of palladium in anod mud and ore samples.更多还原