摘要
用玻璃纤维滤筒采集固定污染源废气颗粒物,借助硝酸和氢氟酸的作用,使滤筒和废气颗粒物在160℃下消解,再用原子荧光法测定消解液中总汞。用50%热硝酸溶液处理玻璃纤维滤筒,消除滤筒本底值不一对测定结果的干扰,并优化消解过程,使该方法在0.050μg/L^1.00μg/L范围内线性良好。当采样体积为10 L时,方法检出限为4.5×10^(-5)mg/m^3,空白加标样6次测定结果的RSD为7.2%,加标回收率为87.0%~113%。将该方法用于测定某固定污染源废气颗粒物中总汞,测定值在标准排放限值内。
The total mercury in particulate matter from stationary source emission was collected by glass fiber filter cartridge, digested by nitric acid and hydrofluoric acid and determined by atomic fluorescence spectrome-try. Hot (1+1) nitric acid was used to pretreat the glass fiber cartridge for reducing the background. The diges-tion method was optimized for a good linear range between 0. 050 μg/L and 1. 00 μg/L. The detection limit was 4. 5 × 10 -5 mg/m3 with a sampling volume of 10 L. The relative standard deviation was 7. 2% by 6 duplicate test of blank spiked samples. The matrix spiked recoveries ranged from 87. 0% to 113%. This method was applied to a stationary source emission, and the concentration of total mercury in particulate matter was within the limit of Chinese discharge standard of integrated emission standard of air pollutants ( GB 16297-1996 ) .
出处
《环境监测管理与技术》
CSCD
2015年第6期51-53,共3页
The Administration and Technique of Environmental Monitoring
关键词
总汞
废气颗粒物
原子荧光法
固定污染源
Total mercury
Waste gas particle
AFS
Stationary source emission
