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| 高通量固定污染源废气颗粒物中总汞的测定 |
| Determination of Total Mercury in Particulate Matter of High Throughput Stationary Source Emission |
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| DOI： |
| 中文关键词: 总汞 废气颗粒物 原子荧光法 固定污染源 |
| 英文关键词: Total mercury Waste gas particle AFS Stationary source emission |
| 基金项目: |
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| 中文摘要: |
| 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0.050 μg/L~1.00 μg/L范围内线性良好。当采样体积为10 L时，方法检出限为4.5×10-5mg/m3，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。 |
| 英文摘要: |
| 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 spectrometry. Hot (1+1) nitric acid was used to pretreat the glass fiber cartridge for reducing the background. The digestion 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). |
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