新试剂N-间甲苯基-N′-(氨基对苯磺酸钠)硫脲(MMPT)的合成及其在分析化学中的应用  

Synthesis of the New Reagent N m Methylphenyl N′ (Sodium p aminobenzene sulfonate) thiourea(MMPT) and Its Applications in Analysis

作　　者：马东兰[1] 马狂飚[1] 李建平[1] 王玉炉[1] 

机构地区：[1]河南师范大学化学系

出　　处：《分析试验室》1997年第4期17-20,共4页Chinese Journal of Analysis Laboratory

基　　金：河南省自然科学基金

摘　　要：本文合成新试剂Ｎ－间甲苯基－Ｎ′－（氨基对苯磺酸钠）硫脲（ＭＭＰＴ），经红外、紫外、核磁、元素分析等测试，确定其结构。研究测定了试剂与４０多种离子的反应及其配合物的表观摩尔吸光系数，它可作为Ｃｕ２＋（ｍ＝０．０１５μｇ，ｃ＝０．５μｇ／ｍＬ）、Ａｇ＋（ｍ＝０．１μｇ，ｃ＝３．３μｇ／ｍＬ）的新鉴定试剂和光度法测定Ｐｄ２＋（ε３０９．７＝６．３２×１０４Ｌ·ｍｏｌ－１·ｃｍ－１）、Ｐｔ（Ⅳ）（ε７５４．４＝８．５８×１０４Ｌ·ｍｏｌ－１·ｃｍ－１）等的显色剂，方法灵敏度高、选择性好，用于阳极泥、人发、矿石及催化剂中上述元素的鉴定或测定，均获满意结果。The new reagent N m Methylphenyl N′ (sodium p aminobenzene sulfonate) thiourea(MMPT) was synthesized and characterized by elemental analysis,IR,UV,and HNMR spectra.The reactions of the new reagent with more than 40 kinds of ions were studied and the apparent molar absorptivities of the corresponding complexes were determined.The new reagent can be used as an indentification reagent for Cu 2+ ( m =0.015μg, c =0 5μg/mL) and Ag +( m =0.1μg, c =3.3μg/mL) and a color reagent for quantitative determination of Pd 2+ (ε Pd 309 7 =6 32×10 4L·mol -1 ·cm -1 and ε Pt 754 4 =8 58×10 4L·mol -1 ·cm -1 ).This new method has high sensitivity and good selectivity and can be successfully used to determine the above elements in anode mud,hair ,minerals and catalysts.

关 键 词：硫脲衍生物 显色剂 铜 银 钯 铂 MMPT 

分 类 号：O652.3[理学—分析化学]