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.
出处
《岩矿测试》
CAS
CSCD
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)
关键词
离子色谱法
电热分解
无机阴离子
镁砂
ion chromatography： electrothermal decomposition
inorganic anion
MgO powder
