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环境空气中气态和颗粒态总氟化物分析方法优化
Method Optimization for Determination of Gaseous and Particulate Fluorides in Ambient Air
投稿时间:2017-07-28  修订日期:2017-11-08
DOI:10.19316/j.issn.1002-6002.2018.02.11
中文关键词:  氟化物  滤膜采样  气态和颗粒态  环境空气
英文关键词:fluorides  filter sampling  gaseous and particulate  ambient air
基金项目:
作者单位
阴琨 中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京 100012 
刀谞 中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京 100012 
陈珂 青海省环境监测中心站, 青海 西宁 810007 
王雅雯 青海省环境监测中心站, 青海 西宁 810007 
朱红霞* 中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京 100012 
通讯作者:朱红霞*  中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京 100012  
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中文摘要:
      对双层磷酸氢二钾浸渍滤膜采集-氟离子选择电极测定环境空气中1、24 h气态和颗粒态总氟化物的方法进行了优化研究。方法采用小流量采集(24 h采样流量为16.7 L/min,1 h采样流量为50 L/min),解决了现有方法在样品采集上的问题,优化了样品制备中超声提取和静置方法。采样体积为3、24 m3时,方法检出限分别为0.5、0.06 μg/m3,测定下限分别为2.0、0.24 μg/m3。实际样品测定,采样1 h时,加标回收率为87.9%~109%;采样24 h时,加标回收率为80.2%~99.3%,平行样测定的精密度为0.3%~2.9%,方法精密度和准确度良好,适用于环境空气中氟化物的测定。
英文摘要:
      A method for the determination of gaseous and particulate total fluoride in ambient air for 1 h and 24 h by double layer hydrogen phosphate two potassium impregnated filter sampling-fluorine ion selective electrode was optimized. In sampling periods, small sampling flow rate (24 h sampling flow rate 16.7 L/min, 1 h sampling flow rate 50 L/min) was used, the problems of sampling method were solved, and the methods of ultrasonic and standing for sample preparation were optimized. When the sampling volume was 3 m3 and 24 m3, the detection limit was 0.5 μg/m3 and 0.06 μg/m3, the lower limit of determination was 2.0 μg/m3 and 0.24 μg/m3, respectively. When actual samples were tested, the recovery rate was in the range of 87.9%-109% for sampling for 1 h, 80.2%-99.3% for sampling for 24 h; the precision of parallel determination was in the range of 0.3%-2.9%. This method show good precision and accuracy, is suitable for determination of fluoride in ambient air.
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