螯合树脂吸附比色法测定氯化钠溶液中微量镁  

Photometric determination of magnesium in solution of sodium chloride by chelate resin on exchange

作　　者：曹连城[1] 邓泳南[1] 

机构地区：[1]华中科技大学同济医学院去离子水室,湖北武汉430030

出　　处：《化工科技市场》2002年第2期26-27,共2页Chemical Technology Market

摘　　要：研究了用螯合树脂吸附分离富集氯化钠溶液中微量镁及吸光光度法测定镁含量的方法,回收率为96.0％-101％,在pH10的硼砂-氢氧化钠介质中,镁含量在0-12 μg/25 ml范围内符合比耳定律,方法稳定性高,重现性好。It is necessary to determine the magnesium content in NaCl solution used in ion exchange process for production caustic soda, it is reported in this paper that magnesium can be efficiently presoncentrated from the NaCl polution by the chelate resin ion - exchange method. The adsorbed μg( Ⅱ ) is stripped from the resin with 2 mol·L- HCl,and then determined photometrically with CPAI in a borax buffer solution of pH = 10.0 Beer's low holds in the range of 0 - 12 μg/25 ml .The recovery of the method amounts to 94.0% - 104.0% .The proposed method proves to be reliable in repeatability and reproducibility.

关 键 词：氯化钠溶液 螯合树脂吸附比色法 偶氮氯膦I 测定 微量镁 

分 类 号：TQ131.12[化学工程—无机化工]