2-(2,3,5-三氮唑偶氮)-5-乙酰氨基苯酚的合成及其与钴的显色反应  

Synthesis of 2-(2,3,5-triazolylazo)-5-acetamidophenol and its color reaction with cobalt

作　　者：韩德满[1] 蒋华江[1] 叶巧云[1] 

机构地区：[1]台州师范专科学校化学系,浙江临海317000

出　　处：《冶金分析》2002年第3期4-6,共3页Metallurgical Analysis

摘　　要：合成了新试剂 2 (2 ,3 ,5 三氮唑偶氮 ) 5 乙酰氨基苯酚 (TZAAP) ,并研究了其与钴的显色反应及应用。在 pH 9 10的NH3·H2 O -NH4 Cl缓冲液中 ,该试剂与钴形成 1∶1红色稳定络合物 ,λmax=5 2 8 2nm ,钴量在 0～ 1 2 μg/mL范围内符合比尔定律 ,表观摩尔吸光系数ε=4 93× 10 4 。所拟方法用于维生素B1 2 注射液及环境水样中微量钴测定 ,结果满意。A reagent 2 (2,3,5 triazolylazo) 5 acetamidophenol was synthesized and its color reaction with cobalt was studied The experimental results show that cobalt reacts with the reagent to form a stable red complex(1∶1) in the presence of NH 3·H 2O-NH 4Cl at pH 9 10,the apparent molar absorptivity is 4 93×10 4L·mol -1 ·cm -1 at λ max =528 2nm,Beer′s law is obeyed in the range of 0-1 2μg/mL for cobalt The method has been applied to the spectrophotometric determination of trace cobalt in VB 12 injection and environmental water with satisfactory results

关 键 词：显色反应 2-(3 5 5-三氮遇氮)-5-乙酰氨基苯酚 分光光度法 钴 

分 类 号：O657.3[理学—分析化学]