使用带有内部过滤胶囊的空气采样器对颗粒物进行重量分析。
Gravimetric Analysis of Particulate Matter using Air Samplers Housing Internal Filtration Capsules.
作者信息
O'Connor Sean, O'Connor Paula Fey, Feng H Amy, Ashley Kevin
机构信息
US Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 4676 Columbia Parkway, Mail Stop R-7, Cincinnati, Ohio 45226-1998, USA,
出版信息
Gefahrst Reinhalt Luft. 2014 Oct;74(10):403-410.
An evaluation was carried out to investigate the suitability of polyvinyl chloride (PVC) internal capsules, housed within air sampling devices, for gravimetric analysis of airborne particles collected in workplaces. Experiments were carried out using blank PVC capsules and PVC capsules spiked with 0,1 - 4 mg of National Institute of Standards and Technology Standard Reference Material (NIST SRM) 1648 (Urban Particulate Matter) and Arizona Road Dust (Air Cleaner Test Dust). The capsules were housed within plastic closed-face cassette samplers (CFCs). A method detection limit (MDL) of 0,075 mg per sample was estimated. Precision S at 0,5 - 4 mg per sample was 0,031 and the estimated bias was 0,058. Weight stability over 28 days was verified for both blanks and spiked capsules. Independent laboratory testing on blanks and field samples verified long-term weight stability as well as sampling and analysis precision and bias estimates. An overall precision estimate Ŝ of 0,059 was obtained. An accuracy measure of ±15,5% was found for the gravimetric method using PVC internal capsules.
开展了一项评估，以调查空气采样装置中使用的聚氯乙烯（PVC）内装胶囊用于工作场所空气中颗粒物重量分析的适用性。使用空白PVC胶囊以及添加了0.1 - 4毫克美国国家标准与技术研究院标准参考物质（NIST SRM）1648（城市颗粒物）和亚利桑那道路灰尘（空气滤清器测试灰尘）的PVC胶囊进行实验。这些胶囊放置在塑料封闭式盒式采样器（CFC）中。估计每个样品的方法检出限（MDL）为0.075毫克。每个样品0.5 - 4毫克时的精密度S为0.031，估计偏差为0.058。验证了空白胶囊和加标胶囊在28天内的重量稳定性。对空白样品和现场样品的独立实验室测试验证了长期重量稳定性以及采样和分析的精密度和偏差估计。获得的总体精密度估计值Ŝ为0.059。发现使用PVC内装胶囊的重量法的准确度为±15.5%。
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