本文叙述了采用萃取-分光光度法测定萃余矿浆中微量三脂肪胺。萃余矿浆中的胺溶于异丙醇水溶液,在pH为4的醋酸-醋酸钠介质中,胺与甲基橙生成黄色络合物。然后用氯仿将其络合物萃取,进行分光光度测定。本法灵敏度高、简便、快速、重现性好。相对标准偏差优于±5％,回收率为100±5％。 This paper describes the determination of trace tri-fatty amines in raffinate slurries by extraction-spectrophotometry. The amine in the raffinate slurry is dissolved in an isopropanol aqueous solution, and the amine and methyl orange form a yellow complex in an acetic acid-sodium acetate pH 4 solution. The complex was then extracted with chloroform and subjected to spectrophotometry. The method of high sensitivity, simple, fast, reproducible. The relative standard deviation was better than ± 5% and the recovery rate was 100 ± 5%.