目前,测定微量元素镓(Ga)大多采用罗丹明 B 法,也有采用铬天青 S 等作显色剂,这种方法各有不同的优缺点,为了扩大镓的测量范围,而选用茜素紫,本文研究提出在 PH=5的条件下,在氯化十六烷基吡啶存在时,用茜素紫作显色剂,测量微量元素镓,实验结果表明,本方法在灵敏度,选择性,稳定性等方面有较大的特点,在0—50ug/50ml 范围内符合比尔定律,是值得推广应用的新方法。 Currently, the determination of trace elements of gallium (Ga) are mostly rhodamine B method, there are also used chrome azure S as a color reagent, this method has its own advantages and disadvantages, in order to expand the measurement range of gallium, and use alizarin purple In this paper, it is proposed that the measurement of trace element gallium with alizarin violet as colorant in the presence of cetyl pyridinium chloride under the conditions of pH = 5, the experimental results show that the method is sensitive, selective and stable Sexual and other aspects of the larger features, in the range of 0-50ug / 50ml Beer’s law is in line with, is worth promoting the use of new methods.