meso-四(3-三氟甲基苯基)卟啉与锌的微波催化显色反应的研究  

Study on the microwave catalyzed color reaction between meso-tetrakis(3-trifluoromethylphenyl) porphyrin and zinc

作　　者：俞善辉[1] 吴继魁[2] 王麟生[3] 吴斌才[3] 

机构地区：[1]华东理工大学化学系,上海200237 [2]上海水产大学食品学院,上海200090 [3]华东师范大学化学系,上海200062

出　　处：《化学试剂》2008年第12期881-883,890,共4页Chemical Reagents

基　　金：上海水产大学优秀青年教师跟踪项目(A-0212-06-0044)

摘　　要：研究了用新显色剂meso-四（3-三氟甲基苯基）卟啉（T（3-TFMP）P）光度法测定痕量锌（Ⅱ）时微波对于显色反应的催化作用和微波操作条件。实验表明，在pH10．8的缓冲液、Tween-80及盐酸羟胺介质中，经微波加热50min，显色反应完全，锌（Ⅱ）量在0～4．0μg／25mL范围内具有线性关系，表观摩尔吸光系数ε429为5．13×10^5L·mol^-1·cm^-1。采用加入CyDTA进行退色光度法测定，同时加入混合掩蔽剂，可以消除大多数共存离子的干扰。方法可应用于三甘醇和保健品中痕量锌（Ⅱ）的测定。Upon spectrophotometric testing of trace zinc （Ⅱ） using a new color reagent meso-tetrakis （3-trifluoromethylphenyl） porphyrin （T（3-TFMP） P） the impact of microwave catalyzed reaction and the microwave operating conditions on the color reaction was studied. Experiments showed that in a mixture containing a buffer solution with a pH value of 10.8, Tween-80, and hydroxylamine hydrochloride, the color reactions were realized when the mixture was heated for 50 minutes via microwave catalysis. The linear range of the amount of zinc （ Ⅱ ） thus determined was 0 - 4.0 /μg/25 mL, while the molar absorptivity ε429 was 5.13 × 10^5 L. mol^-1. cm^-1. When CyDTA was added along with a mixed screening agent during the discoloring spectrophotometric tests, the interference from most coexisting ions could be avoided. This method can be applied to the testing of trace zinc （ Ⅱ ） in triethylene glycol and health products.

关 键 词：meso-四(3-三氟甲基苯基)卟啉 锌(Ⅱ) 微波 显色反应 分光光度法 

分 类 号：O657.31[理学—分析化学]