常量锑砷的连续滴定已有不少文献报导,如采用高锰酸盐、溴酸盐,硫酸铈之类滴定剂及甲基橙、甲基红,二苯胺、试亚铁灵等指示剂,但都存在一些争议。最近又有人报导了在二元或三元混合物中以试亚铁灵为指示剂,用硫酸铈滴定锑和砷的方法,但未报导具体条件试验和试样分析。 本文在文献的试验基础上进行试验(如样品分解,还原剂、干扰元素、介质等),拟定了电位滴定的可行条件,并应用指示剂滴定法和电位滴定法对各种生产试样进行分析,结 Continuous titration of constant antimony arsenic has been reported in many literatures, such as the use of titrants such as permanganate, bromate, cerium sulfate, and methyl orange, methyl red, diphenylamine, But there is some controversy. Recently, it has also been reported that titration of antimony and arsenic with cerium sulfate in the binary or ternary mixture with test-ferrous spirit as an indicator, but no specific condition test or sample analysis was reported. In this paper, based on the experiments in the literature (such as sample decomposition, reducing agent, interfering elements, medium, etc.), the potential conditions of potentiometric titration have been established, and the indicator titration and potentiometric titration were used to analyze various production samples Knot