摘要
建立了电导检测–离子色谱法同时测定生活饮用水中F–,Cl–,SO42–,NO3–的方法。选择30 mmol/L Na OH溶液为淋洗液,流量为1.40 m L/min,检测器电流为106 m A。F–的线性范围为0.15~2.0 mg/L,Cl–,SO42–,NO3–的线性范围为3.00~40.0 mg/L,4种离子的线性相关系数均大于0.999 5。F–,Cl–,SO42–,NO3–的方法检出限分别为0.02,0.13,0.14,0.02 mg/L,加标回收率在95.2%~103.0%之间。对环境标准204715进行了平行测试,各阴离子测定值均在标准值的不确定度范围内,测定结果的相对标准偏差小于2%(n=6)。该方法灵敏、准确、快速,可用于生活饮用水中F–,Cl–,SO42–,NO3–的同时测定。
The method was established for the simultaneous determination of F^-, Cl^-, SO4^2- and NO3^- in drinking water by conductometric ion chromatography. 30 mmol/L NaOH solution was selected as the eluent with the flow velocity of 1.40 mL/min, and the detector current was optimized to 106 mA. The linear range was 0.15-2.0 mg/L for F^-, and 3.00-40.0 mg/L for Cl^-, SO42-, NO3-, and the correlation coefferients were all more than 0.999 5. The detection limits of F^-, Cl^-, SO4^2- and NO3^- were 0.02,0.13,0.14 and 0.02 mg/L, respectively. The recoveries of the added standard were 95.2%- 103.0%, the environmental standard 204715 was determined repeatedly, and the detection values were all within the scope of the uncertainty of the recommended value, and the RSDs were less than 2%（n=6）. This method has the advantages of sensitive, it is accurate and fast, so it can be used to determine F^-, Cl^-, SO4^2- and NO3^- in drinking water simultaneously.
出处
《化学分析计量》
CAS
2015年第4期23-25,共3页
Chemical Analysis And Meterage
基金
国家重大科学仪器开发专项应用方法开发项目(2011Y17006505)
关键词
离子色谱法
生活饮用水
电导检测
阴离子
ion chromatography
drinking water
conductometric detection
anionic
