Gravimetric analysis of particulate matter using air samplers housing internal filtration capsules.
O'Connor-S; O'Connor-PF; Feng-HA; Ashley-K
Gefahrstoffe - Reinhaltung der Luft 2014 Oct; 74(10):403-410
An evaluation which 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 carried out using blank PVC and PVC capsules capsules spiked with 0.1 to 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 (CFC) samplers. A method detection limit (MDL) of 0.075 mg per sample was estimated. Precision Sr at 0.5 to 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 Srt of 0.059 was obtained. An accuracy measure of +/- 15.5% was found for the gravimetric method using PVC internal capsules.
Air-sampling; Air-sampling-equipment; Gravimetric-analysis; Airborne-particles; Work-environment; Dusts; Analytical-processes; Laboratory-testing; Particulates; Particulate-dust; Exposure-levels
Gefahrstoffe - Reinhaltung der Luft