分光光度法测定氯化钾浮选液中十八胺含量  

Spectrophotometric Determination of Octadecylamine in Brine from KCl Flotation

作　　者：刁祥瑞[1,2] 张洪满[1] 张君[1] 程芳琴[1] 

机构地区：[1]山西大学资源与环境工程研究所,山西太原030006 [2]青海盐湖元通钾肥有限公司,青海察尔汗816000

出　　处：《中北大学学报（自然科学版）》2011年第3期323-328,共6页Journal of North University of China(Natural Science Edition)

摘　　要：在正浮选法生产氯化钾过程中,十八胺用量是影响浮选效率的因素.以溴甲酚绿为指示剂,研究了分光光度法测定氯化钾浮选液中十八胺(ODA)含量的最佳条件.实验结果表明:十八胺-溴甲酚绿(BCG)的最大吸收峰波长为414 nm,摩尔吸光系数为1.4×104L/(mol.com),在1×10-5～10×10-5mol/L范围内遵守比尔定律.以此为依据建立了合适的测定方法,测得氯化钾浮选液中十八胺浓度的相对误差为-1.94%,相对标准偏差RSD为1.52%,该法具有稳定性好、灵敏度和准确度高、所用试剂价廉易得、操作简便快速等优点,为微量十八胺的测量提供了有效的方法.Aiming at the influence of the flotation reagent on KC1 flotation in industrial production, the best experimental condition of the determination of the octadecylamine （ODA） content in brine from KCI flotation by spectrophotometer with bromocresol green （BCG） as indicator is studied. The results indicate： the molar absorptivity of the complex of ODA and BCG is 1.4）〈 104 L/（mol ~ com） at wave length of 414 nm, Beer＇s law is obeyed in the range of 1X10 5~10X10 5mol/L; the relative error of ODA is about -- 1.94 ~, with RSD----- 1.54 %. This method applied to the determination of ODA in brine samples of KC1 flotation is more stable, simple sensitive, accurate, cheap and easy to get required reagent, simple and quick to operate, which provides an effective method for trace analysis of ODA, and has a certain application value.

关 键 词：氯化钾 浮选液 十八胺 分光光度法 溴甲酚绿 

分 类 号：O658[理学—分析化学]