测定凝结水痕量阴离子的色谱法  

Simultaneous determination of trace Cl^- and SO_4^(2-) in power plant condensate based on ion chromatography

作　　者：李永生[1] 张雪琴[1] 孙旭辉[1] 

机构地区：[1]东北电力学院应用化学系,吉林吉林132044

出　　处：《华东电力》2004年第5期5-9,共5页East China Electric Power

摘　　要：介绍了可用于测定水中痕量阴离子的色谱法,以自制新型分离柱,用5.3mmol/L的Na2CO3溶液为淋洗液,在1.5mL/min的流速下,成功地同时测定了火电厂凝结水中的痕量氯离子和硫酸根。氯离子的测定范围为1～20μg/L,回收率为98%～105%,相对标准偏差为0.77%,检出下限可达0.8μg/L;硫酸根的测定范围为15～50μg/L,回收率为97%～104%,相对标准偏差为0.91%,检测下限可达1.0μg/L。该离子色谱法已能满足测定火电厂凝结水中痕量氯离子和硫酸根离子的要求。A new method was put forward for simultaneous determination of trace Cl^- and SO_4^(2-) in power plant condensate based on ion chromatography with a sellulose separation column developed by the author. Using 5.3 mmol/L Na_2CO_3 solution as the eluent at a flow rate of 1.5 ml/min, the simultaneous determination of trace Cl^- and SO_4^(2-) in condensate was successfully conducted. The determination ranges are 1～20 μg/L for Cl^- and 15～50 μg/L for SO_4^(2-). The relative standard deviation of Cl^- and SO_4^(2-) are 0.77% and 0.91% respectively. The detection limits are 0.8 μg/L (Cl^-) and 1.0 μg/L (SO_4^(2-)), the recovery rate are 98%～105% (Cl^-) and 97%～104% (SO_4^(2-)) respectively.

关 键 词：火电厂 凝结水 痕量氯离子 硫酸根 色谱法 测定 水处理 

分 类 号：TM621.8[电气工程—电力系统及自动化]