铝土矿浮选产品中捕收剂的分析

来源期刊：中南大学学报(自然科学版)2000年第6期

论文作者：蒋玉仁 薛玉兰 张立人

文章页码：493 - 496

关键词：紫外分光光度法;铝土矿;浮选;脂肪酸类捕收剂;分离;富集

Key words：UV spectrophotometry; bauxite; flotation; collector of fatty acid; extraction; enrichment

摘    要：采用溶剂解吸提取预处理和紫外分光光 度法研究了铝土矿浮选产品中微量脂肪酸捕收剂的分析方法 .通过对比三氯乙烯、四氯乙烯、三氯甲烷、四氯化碳和正己烷 5种溶剂的解吸提取性能 ,提出在液固比为 2 .5mL/g的条件下 ,以三氯甲烷解吸提取、富集样品中的捕收剂 ,以紫外分光光度法进行铝土矿浮选产品中微量捕收剂的定量分析 ,并对其可靠性进行了检验 .研究结果表明 :在 5种解吸溶剂中 ,三氯甲烷的解吸提取性能最佳 ,能在液固比为0 .5～ 5.0mL/g的范围内解吸并富集铝土矿浮选产品表面的捕收剂 .用该方法分析捕收剂含量为 10 0～ 10 0 0g/t的铝土矿浮选产品 ,测定结果的变异系数和回收率分别为 1.4%～ 1.6 %和 97%～ 10 3% ,具有重现性好、结果准确、操作简便快捷的特点.

Abstract: A quantitative analysis of microcomponent collector of fatty acid in flotation products of bauxite was studied by pretreatment of desorption and extraction with solvent and UV spectrophotometry, and the reliability was also tested via measurment of accuracy and precision. The results indicate that, among the five solvents of trichloroethylene, tetrachloroethylene, chloroform, tetrachlorocarbon and hexane, chloroform has perfect property of desorption to the collector on the surface of flotation products in the range of ratio of liquid and solid from 0.5 mL/g to 5.0 mL/g, and the content of collector can be determined by UV spectrophotometer under the ultraviolet wavelength of 242 nm after the collector is desorbed and extracted by chloroform in condition of 2.5 mL/g of the ratio of liquid and solid. Samples of the concentration range of collector from 100 g/t to 1 000 g/t, the test results of the coefficient of variability and the recovery are between 1.4%～1.6% and 97%～103%, respectively, which demorstrate that the quantitative analysis method for microcomponent collector of fatty acid in flotation products of bauxite possesses is of high accuracy and precision.