S.O.P. No. MLD 016, Revision 6.0 - Mass Analysis and Subsequent Extraction of SSI-Sampled PM10 from Exposed Quartz Microfiber Filters
This document details the mass analysis and water extraction of particulate matter less than or equal to ten micrometers in mean aerodynamic diameter (PM10) from exposed quartz microfibre filters. It combines and supercedes SOP NSL016, Revision No. 5.0 (January 18, 2002) and SOP MLD 030 (April 1, 1990).
SUMMARY OF METHOD
Before field sampling, individual quartz microfibre filters are weighed on an electronic balance that is interfaced to the Laboratory Information Management System (LIMS). PM10 is collected from ambient air over a 24-hour period on the quartz microfibre filters. The filters are then post-weighed, and the concentration of PM10 particles in the air in µg/m3 is calculated based on the total volume of air drawn through the filter. For samples that undergo ion analysis, one quarter of the exposed area is cut from the filter. Water-soluble compounds deposited on this filter section are extracted by vigorous shaking in purified water. The extraction solution is vacuum filtered, bottled and stored for later analysis by ion chromatography.