4-(2-噻唑偶氮)-苯二甘氨酸的合成及其与钯显色反应的研究  

Synthesis of 4-(2-thiazolylazo)-ndicphenyeycine and study on its color reaction with palladium

作　　者：李蕾[1] 陈江敏[1] 饶美香[1] 

机构地区：[1]赣南师范学院化学系,赣州341000

出　　处：《分析试验室》2002年第1期43-45,共3页Chinese Journal of Analysis Laboratory

摘　　要：报道了水溶性 4 ( 2 噻唑偶氮 ) 苯二甘氨酸 (TAPC)新试剂的合成。该试剂对钯具有较高灵敏度和选择性。在 0 .5mol/LHNO3介质中 ,TAPC与Pd(Ⅱ )形成 2∶1蓝色配合物 ,最大吸收波长 632nm。钯浓度在 0 μg/mL～ 1 .6μg/mL范围内符合比耳定律 ,表观摩尔吸光系数ε632 =5× 1 0 4 L·mol- 1 ·cm- 1 。可允许许多离子共存 。A new water soluble color reagent 4 (2 thiazolylazo) ndicphenyeycine was synthesized as a sensitive and selective chromogenic reagent for determination of palladium. In a 0.5 mol/L nitric acid medium, palladium(Ⅱ) reacted with TAPC to from a stable 1∶2 blue chelate. It has a maximum absorption wavelength at 632 nm. Beer′s law is obeyed over a range of 0 μg/mL～1 6 μg/mL for Pd. The apparent molar absorption coefficient is 5×10 4 L·mol -1 ·cm -1 . Large amounts of coexisting element did not interfere. The method was applied to the direct determination of palladium in molecular sieves with satisfactory results.

关 键 词：钯 噻唑偶氮试剂 分子筛 分光光度法 4-(2-噻唑偶氮)-苯二甘氨酸 测定 微量分析 

分 类 号：TQ424.2[化学工程] O614.823[理学—无机化学]