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 m^3时,方法检出限分别为0.5、0.06μg/m^3,测定下限分别为2.0、0.24μg/m^3。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。
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.
作者
阴琨
刀谞
陈珂
王雅雯
朱红霞
YIN Kun1, DAO Xu2, CHEN Ke2, WANG Yawen2 ,ZHU Hongxia1(1. State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring, China National Environmental Monitoring Centre,Beijing 100012,China ;2. Qinghai Province Environmental Monitoring Centre ,Xining 810007, Chin)
出处
《中国环境监测》
CAS
CSCD
北大核心
2018年第2期77-82,共6页
Environmental Monitoring in China
关键词
氟化物
滤膜采样
气态和颗粒态
环境空气
fluorides
filter sampling
gaseous and particulate
ambient air