【摘要】 目的 通过研究确定β射线吸收法作为室内空气中可吸入颗粒物检测的标准方法。方法 采用吸收法进行实验研究与现场监测相结合的方法并同步与经典称重法进行比较。结果 采用美国NIOSH标准规定的方法,计算β射线吸收法总准确度为20.7％,同滤膜称重法比较,相关系数v=0.988,回归式y=0.581+1.086X,无显著性意义(P>0.05)。结果表明β射线吸收法等效于滤膜称重法。结论 该方法克服了古老称重法操作麻烦费时费力的缺点,达到了快速、准确、智能化。适用于室内空气中可吸入颗粒物质量浓度的测定。更多还原

【Abstract】 Objective To develop standard method ofβxay absorption analysis of inhaling particles in the room-air. Methods β-xay absorption analysis was combined with on-site monitoring, its results were compared with ones of institutional weighting method.Results By calculating with US NIOSH criterion, total exactness is 20.7% compared with filter-paper weighting, correlation coefficient v is 0.988, regression equation y = 0.581 + 1.086x (P>0.05) . These show thatβ-xay absorption method head equals to filter-paper weighting in terms of efficacy.Conclusion β-xay absorption method overcame many weaknesses of filter-paper weighing such as time-wasting, work-wasting and procedure-complexity, and is suited to analysis of inhaling particles in the room-air.更多还原