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Environ Monit Assess ; 189(11): 543, 2017 Oct 07.
Artigo em Inglês | MEDLINE | ID: mdl-28988385

RESUMO

Performance reference compounds (PRCs) are neutral organic compounds, introduced in a passive sampler prior deployment for the assessment of in situ sampling rate. In this study, evaluation of in situ sampling rates of 16 13C-PAH-PRCs with moderate and high hydrophobicity was established to provide an overall correction factor for variations in virtual organism (VO) uptake rates of the analytes of interest. In situ sampling rate was compared to an empirical model during sampling campaign in 2011 with VO in 12 different sites along the Three Gorges Reservoir (TGR) in China. A discrepancy was observed for high hydrophobic compounds with log K ow ranging from 5.18 to 6.63 where ΣPAH concentration in TGR from Huckins model (305,624 pg/L) was resulted to be roughly 2-fold higher than the alternative procedure (182,292 pg/L). A relationship between in situ sampling rates of the 16 13C-PAH-PRCs (Rs, PRC ) and log K ow was set up to allow then calculation of analyte sampling rate Rs analyte (N) of various organic pollutants with log K ow  ≤ 6.63.


Assuntos
Monitoramento Ambiental/instrumentação , Modelos Químicos , Compostos Orgânicos/química , Poluentes Químicos da Água/análise , China , Interações Hidrofóbicas e Hidrofílicas , Hidrocarbonetos Policíclicos Aromáticos/análise , Hidrocarbonetos Policíclicos Aromáticos/química , Água/química , Poluentes Químicos da Água/química
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