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文章摘要

高精度光散射法在大气颗粒物监测中的应用评估

Application Evaluation of High precision Light Scattering Method for Ambient Particulate Matter Monitoring

DOI：

英文关键词: Particulate matter High precision light scattering method Gravimetric method β ray absorption method Comparative analysis Ambient air

基金项目:国家科技重大专项“京津冀环境综合治理”基金资助项目（2024ZD1200102）

作者	单位
吴明胤	安徽省生态环境监测中心
李启勇	安徽省生态环境监测中心
魏桢	安徽省生态环境监测中心
张付海	安徽省生态环境监测中心
杨义新	国科学院合肥物质科学研究院安徽光学精密机械研究所,安徽省环境光学监测技术重点实验室
桂华侨	国科学院合肥物质科学研究院安徽光学精密机械研究所,安徽省环境光学监测技术重点实验室

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中文摘要:

2025年1月—3月在合肥市测试场，以重量法为基准，考察高精度光散射法在不同浓度、湿度、污染类型下的监测结果。结果表明：高精度光〖JP2〗散射法与重量法相关性良好（R为095～097），测定高质量浓度时相对误差达-257%～-206%，〖JP〗相对湿度每增加10%，绝对误差增大18%～22%；在中度污染过程中，高精度光散射法相对偏差均值可控制在±10%以内；烟花爆竹燃放和沙尘期PM25 值分别低估20%～35%和15%～25%，沙尘期PM10值低估30%～40%。

英文摘要:

From January to March 2025 at the Hefei testing site， monitoring results obtained by the high precision light scattering method were evaluated using the gravimetric method as the reference under different concentrations， humidity levels， and pollution types. The results showed that the high precision light scattering method achieved a good correlation with the gravimetric method， with R values ranging from 095 to 097. Its relative error ranged from -257% to -206% when measuring particulate matter at high mass concentrations. The absolute error increased by 18%~22% for every 10% rise in relative humidity. The mean relative deviation of the high precision light scattering method was within ±10% during moderate pollution episodes. During fireworks/firecracker activity and dust events， PM25 concentrations were underestimated by 20%~35% and 15%~25%， respectively， while PM10 concentrations were underestimated by 30%~40% during dust events.

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