Calibration and evaluation of PUF-PAS sampling rates across the Global Atmospheric Passive Sampling (GAPS) network

Environmental Science. Processes & Impacts
Nicholas J HerkertKeri C Hornbuckle

Abstract

Passive air samplers equipped with polyurethane foam (PUF-PAS) are frequently used to measure persistent organic pollutants (POPs) in ambient air. Here we present and evaluate a method to determine sampling rates (RS), and the effective sampling volume (Veff), for gas-phase chemical compounds captured by a PUF-PAS sampler deployed anywhere in the world. The method uses a mathematical model that requires only publicly available hourly meteorological data, physical-chemical properties of the target compound, and the deployment dates. The predicted RS is calibrated from sampling rates determined from 5 depuration compounds (13C PCB-9, 13C PCB-15, 13C PCB-32, PCB-30, and d6-γ-HCH) injected in 82 samples from 24 sites deployed by the Global Atmospheric Passive Sampling (GAPS) network around the world. The dimensionless fitting parameter, gamma, was found to be constant at 0.267 when implementing the Integrated Surface Database (ISD) weather observations and 0.315 using the Modern Era Retrospective-Analysis for Research and Applications (MERRA) weather dataset. The model provided acceptable agreement between modelled and depuration determined sampling rates, with 13C PCB-9, 13C PCB-32, and d6-γ-HCH having mean percent bias near zero ...Continue Reading

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Mar 11, 2016·Environmental Science & Technology·Nicholas J HerkertKeri C Hornbuckle
Apr 18, 2017·Environmental Science & Technology Letters·Andres MartinezKeri C Hornbuckle

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Citations

Oct 1, 2018·Environmental Pollution·Cassandra RauertBeatriz Helena Aristizábal Zuluaga
Jul 3, 2021·Environmental Science & Technology·Jasmin K SchusterConnor W Johnson
Oct 24, 2020·Environmental Science & Technology·Kevin B WhiteJana Klánová

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Software Mentioned

GAPS
MERRA
Matlab
Curve Fitting Toolbox

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