离子色谱法测定电厂锅炉水汽中痕量阳离子  

Study on the determination of trace cations in the boiler vapor of power plants by ion chromatography

作　　者：李瑛[1] 黄万启[1] 常旭红[1] 曹松彦[1] 王海莲[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032

出　　处：《工业水处理》2012年第11期84-86,共3页Industrial Water Treatment

摘　　要：研究了利用直接电导检测-离子色谱法分离测定电厂水汽中Na+、NH4+、K+、Ca2+、Mg2+5种阳离子的方法。选择色谱条件为Ion Pac CS12A阳离子交换柱,20 mmol/L甲基磺酸淋洗液,抑制性电导检测。该方法采用500μL进样,5种阳离子的检出限为0.03～0.13μg/L,相对标准偏差(RSD,n=5)在0.24%～2.5%之间,加标回收率为96%～110%,该方法具有选择性好、检出限低、灵敏度高、操作简便等特点,可用于电厂给水、凝结水、蒸汽等水样中阳离子的测定。The method by using direct conductivity detection-ion chromatography process for separating and deter- mining five kinds of cations ： Na＋, NH4＋, K＋, Ca2＋, Mg2＋ has been studied. The chromatographic condtions are Ion Pac CS12A cationic exchange column,20 mmol/L methanesuffonic acid leacheate and inhibiting electric-conductance detection. The sample used is 500 μL. Detection limit of the 5 kinds of cations is 0.03-0.13 μg/L, and relative stan- dard deviations （RSD, n=5） 0.24%-2.5%, and the standard recoveries 96%-110%. This method is characterized by good selectivity, low detection limit ,high sensitivity, easy operation, etc. It can be used for determining cations in samples, such as water supply in power plants, condensed water, steam, etc.

关 键 词：离子色谱 电厂 锅炉水 阳离子 

分 类 号：TM621.8[电气工程—电力系统及自动化]