Development of methodology to correct sampling error associated with FRM PM10 samplers

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Title: Development of methodology to correct sampling error associated with FRM PM10 samplers
Author: Chen, Jing
Abstract: Currently , a lack of accurate emission data exits for particulate matter (PM ) in agricultural air quality studies (USDA -AAQTF , 2000 ) . PM samplers , however , tend to over estimate the concentration of most agricultural dusts because of the interaction of the particle size distribution (PSD ) and performance characteristics of the sampler (Buser , 2004 ) . This research attempts to find a practical method to characterize and correct this error for the Federal Reference Method (FRM ) PM10 sampler . First , a new dust wind tunnel testing facility that satisfies the USEPA ?s requirement of testing PM10 samplers was designed , built , and evaluated . Second , the wind tunnel testing protocol using poly -dispersed aerosol as the test dust was proved to be able to provide results consistent with mono -dispersed dusts . Third , this study quantified the variation of over sampling ratios for the various cut point and slopes of FRM PM10 samplers and proposed an averaged over sampling ratio as a correction factor for various ranges of PSD . Finally , a method of using total suspended particle (TSP ) samplers as a field reference for determining PM10 concentrations and aerosol PSD was explored computationally . Overall , this dissertation developed successfully the methodology to correct the sampling error associated with the FRM PM10 sampler : (1 ) wind tunnel testing facilities and protocol for experimental evaluation of samplers ; (2 ) the variation of the oversampling ratios of FRM PM10 samplers for computational evaluation of samplers ; (3 ) the evaluation of TSP sampler effectiveness as a potential field reference for field evaluation of samplers .
URI: http : / /hdl .handle .net /1969 .1 /ETD -TAMU -1424
Date: 2009-05-15

Citation

Development of methodology to correct sampling error associated with FRM PM10 samplers. Available electronically from http : / /hdl .handle .net /1969 .1 /ETD -TAMU -1424 .

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