Quantifying Aircraft Lead Emissions at Airports (2015) / Chapter Skim
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Pages 183-191
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Appendix B Additional Field Study Information
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Additional Field Study Information PM Sample Collection Protocols Airborne PM samples were collected using Model PQ100 portable samplers (BGI, Waltham, MA)
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diluted to a final volume of 15 ml with de-ionized water to have a nitric acid content of 5% (v/v)
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to react with the iodine and then an ICP-MS standard bismuth solution was added as an internal standard. A 10% nitric acid solution was then added and thoroughly mixed.
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Analysis of reagent, filter, and spiked blanks identified contamination in two batches of ICP-MS sample runs accounting for 55% of the SMO samples. Blank concentrations were high as 5 ng/m3 (reported as effective ambient Pb concentrations)
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PM-Pb Field Blanks Eight PM2.5 and four TSP field blanks were collected at each airport (three field blanks per sampler per airport)
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Collocated Precision Given the importance of characterizing data quality at high PM-Pb concentrations, PM2.5Pb precision was further examined. Collocated sample pairs were ranked by the mean concentration for each pair and the precision was repeatedly calculated adding one pair at a time, starting with the highest concentration and adding sample pairs with decreasing concentration.
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PM-Pb Analysis by XRF with Comparison to ICP-MS Twenty-two airborne PM2.5 samples from each airport were sent to Cooper Environmental Services (CES) for elemental analysis by XRF.
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References Dobrzhinsky, N., E Krugly, L
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