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为公共场所空气可吸入颗粒物监测选择比较适用的方法并为制订国家公共场所空气可吸入颗粒物卫生检验标准方法提供依据 ,分别用P - 5L2 型光散射测尘仪、LD - 1型激光粉尘仪和滤膜称重法同时对常州地区 4类公共场所分春、夏、秋、冬 4个季节进行监测。结果表明质量浓度与相对浓度存在明显相关 (r1=0 7787,P <0 0 0 1;r2 =0 75 2 6 ,P <0 0 0 1) ,相对浓度和质量浓度的转换系数 (K)呈近似正态分布 ,P - 5L2型光散射测尘仪与LD - 1型激光粉尘仪的K的均值分别为0 0 16 3、7 42× 10 -4 ,K值均不随公共场所行业类型、季节以及是否使用空调而改变 ,监测结果稳定。表明采用光散射法替代滤膜称重法是可行的 ,P - 5L型光散射测尘仪、LD - 1型激光粉尘仪在公共场所空气可吸入颗粒物监测中具有较大的适用性 ,鉴于地区间K值存在差异 ,故仪器使用前宜测定当地的K值。
In order to provide the basis for the establishment of the standard method of sanitary inspection of air respirable particulate matter in public places, the paper chooses P - 5L2 light scattering dust analyzer, LD - 1 laser dust analyzer and In the meantime, four kinds of public places in Changzhou, including spring, summer, autumn and winter, were monitored by the membrane weight method. The results showed that there was a significant correlation between mass concentration and relative concentration (r1 = 0 7787, P <0 0 01; r2 = 0 75 2 6, P 0 01 0), and the conversion coefficient Approximately normal distribution, K means of P - 5L2 light scattering dust analyzer and LD - 1 laser dust analyzer are respectively 0 0 16 3, 7 42 × 10 -4, K values are not the same with the industry type of public places, season And whether to use air conditioners to change, the monitoring results are stable. It shows that it is feasible to use the light scattering method instead of the membrane filtration method. The P - 5L light scattering dust analyzer and LD - 1 laser dust analyzer have great applicability in the monitoring of air respirable particulate matter in public places. There is a difference between K values, so the instrument should be used before measuring the local K value.