二巯基丙醇衍生气相色谱法测定砷  

Gas-Liquid Chromatographic Determination of Trace Arsenic after Derivatization with 2,3-Dimercaptopropanol

作　　者：戴开平[1] 李焰[2] 施文赵 

机构地区：[1]华中理工大学化学系 武汉材料保护研究所,武汉430074 [2]华中理工大学化学系,武汉430074

出　　处：《色谱》1992年第4期218-220,共3页Chinese Journal of Chromatography

基　　金：国家自然科学基金

摘　　要：砷的分析常用氢化物发生法进行分离,然后用各种方法进行检测,往往需要特殊的条件和设备,而且影响氢化物发生的干扰因素和干扰元素很多。砷的衍生气相色谱分析也有研究报,如砷的三苯基衍生物、三甲基硅烷衍生物、二乙基二硫代氨基甲酸盐衍生物等,这些衍生物都未能很好地用于实际样品的测定。最近文献报道。In this paper,it is described that trace As (Ⅲ) and As (V) react directly with 2, 3-dimercaptopropanol (BAL) to form As-BAL complex which is extracted with toluene or other organic solvents. In the presence of 1 mol/L HC1 the reaction is completed in one hour,and the percentage of transformation of arsenic is maximum. The extracted As-BAL is separated using a column of 3 % OV-17 at 200C and detected using an ECD. The detection limit is 0. 01 ng As. This method has been used for the determination of trace As in peach leaf and tea with satisfactory results.

关 键 词：砷 二巯基丙醇 衍生气相色谱 

分 类 号：O613.63[理学—无机化学]