Calibration and evaluation of PUF-PAS sampling rates across the Global Atmospheric Passive Sampling (GAPS) network
نویسندگان
چکیده
منابع مشابه
Global Aquatic Passive Sampling (AQUA-GAPS): using passive samplers to monitor POPs in the waters of the world.
The Stockholm Convention (SC) on persistent organic pollutants (POPs) has highlighted the global risk(s) posed by organic contaminants that are persistent, bioaccumulate, are prone to long-range transport, and have the potential to cause adverse effects in humans and wildlife (1). As a result of the SC, monitoring programs are underway to record concentrations of POPs across the globe over time...
متن کاملPassive sampling of perfluorinated chemicals in water: in-situ calibration.
Perfluorinated chemicals (PFCs) have been recognised as environmental pollutants that require monitoring. A modified polar organic chemical integrative sampler (POCIS) is able to quantify aqueous PFCs. However, with varying external water velocity, PFC sampling rates (Rs) may change, affecting accuracy of derived water concentrations. To facilitate field deployment of this sampler, two methods ...
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ORGANOHALOGEN COMPOUNDS – Volume 66 (2004) 138 Introduction Polyurethane foam (PUF) samplers are being used in an increasing number of studies to passively sample semivolatile organic compounds (SOCs) in the atmosphere (e.g. 1, ). However, recent research shows that the uptake and loss kinetics of passive air samplers is influenced by changes in wind speed . According to theory, the rate of che...
متن کاملCalibration estimation in survey sampling
Calibration estimation, where the sampling weights are adjusted to make certain estimators match known population totals, is commonly used in survey sampling. The generalized regression estimator is an example of a calibration estimator. Given the functional form of the calibration adjustment term, we establish the asymptotic equivalence between the functional-form calibration estimator and an ...
متن کاملthe evaluation of language related engagment and task related engagment with the purpose of investigating the effect of metatalk and task typology
abstract while task-based instruction is considered as the most effective way to learn a language in the related literature, it is oversimplified on various grounds. different variables may affect how students are engaged with not only the language but also with the task itself. the present study was conducted to investigate language and task related engagement on the basis of the task typolog...
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ژورنال
عنوان ژورنال: Environmental Science: Processes & Impacts
سال: 2018
ISSN: 2050-7887,2050-7895
DOI: 10.1039/c7em00360a