离子色谱法测定高纯镁砂中痕量无机阴离子  

Determination of Inorganic Anions in High-purity MgO Powder Samples by Ion Chromatography

作　　者：伯英[1] 侯倩慧 余季金[1] 

机构地区：[1]青岛大学环境科学与工程系,山东青岛266071 [2]青岛普仁仪器有限公司,山东青岛266100

出　　处：《岩矿测试》2006年第3期288-290,共3页Rock and Mineral Analysis

基　　金：青岛大学研究生基金资助项目(061065)

摘　　要：采用阴离子交换色谱电导检测法分析高纯镁砂（MgO）中的无机阴离子。MgO粉末在管式电炉1250-1350℃高温下通氧气加热，硫酸盐和氯化物等受热分解，气态生成物被40mL含25mg镁粉的0．25mol／LNaOH溶液吸收。方法的回收率为93．7％-95．3％，精密度（RSD，n=5）为4．32％-4．63％。对若干相关的分析技术问题，亦进行了讨论。A method for the determination of inorganic anions in high-pttfity MgO powder samples by ion exchange chromatography equipped with conductivity detector was presented. The sample mixture was heated in pipe electric furnace at the temperature of 1250 - 1350℃. Sulphate and chloride were decomposed and the gas products were adsorbed by 40 mL 0.25 mol/L NaOH containing 25 mg Mg powder. Recoveries of the method were 93.7% - 95.3% with precision of 4.32% - 4.63% RSD （n = 5）. Some problems in the analysis were also discussed.

关 键 词：离子色谱法 电热分解 无机阴离子 镁砂 

分 类 号：O657.75[理学—分析化学]