酒石酸钠钾存在下meso-[四(对-三甲铵基)苯基]-卟啉测定痕量铋

Determination of Bismuth Using Meso-Tetrakis-[4- (Trimethyammonium)Phenyl] Prophine and Catalysts Taritrate

研究了阴离子表面活性剂对在酒石酸钠钾等物质的存在下，ｍｅｓｏ四（对－三甲铵基）苯基卟啉（ＴＡＰＰ）与Ｂｉ（Ⅲ）显色反应的作用，在ｐＨ５．３７的ＨＡｃ－ＮａＡｃ介质中，ＴＡＰＰ与Ｂｉ（Ⅲ）在酒石钠钾催化下于室温显色反应８ｍｉｎ，形成Ｂｉ（Ⅲ）∶ＴＡＰＰ＝１∶２的配合物，最大吸收在４６３ｎｍ处，摩尔吸光系数１．０×１０５Ｌ·ｍｏｌ·ｃｍ－１，Ｂｉ（Ⅲ）含量在０～１６μｇ／２５ｍｌ内符合比耳定律，阴离子表面活性剂对此体系无增敏作用．该方法已用于药物中铋的含量测定．

This paper studies the action of anion surfactant to the catalysts tartrate accelerating the color reaction of bismuth with meso tetrakis [4 (trimethyammonium) phenyl] prophine (TAPP).In the medium of pH 5.37 acetate buffer solution,the coordination complex of Bi(Ⅲ) and TAPP can be formed at room temprature about 8min.The maximum absorption is measured at 463nm with the apparent molar absorption 1.0×10 5L·mol -1 ·cm -1 .Beer′s law is followed for bismuth in the range of 0～16μg/25ml.The anion surfactant can not increase the sensitiveness.The method is used in determination of bismuth in the drug.