Silicone-water partition coefficients determined by cosolvent method for chlorinated pesticides, musks, organo phosphates, phthalates and more

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F18%3A00101697" target="_blank" >RIV/00216224:14310/18:00101697 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0045653518313122?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0045653518313122?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chemosphere.2018.07.054" target="_blank" >10.1016/j.chemosphere.2018.07.054</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Silicone-water partition coefficients determined by cosolvent method for chlorinated pesticides, musks, organo phosphates, phthalates and more

Popis výsledku v původním jazyce

To further support implementation of monitoring by passive sampling, robust sampler-water partition coefficients (K-pw) are required to convert data from passive sampler into aqueous phase concentrations. In this work silicone-water partition coefficients were determined for similar to 80 hydrophobic organic contaminants using the cosolvent method. Partition coefficients (K-pm) were measured in pure water and water-methanol mixtures up to a methanol mole fraction of 0.3 (50% v/v). Subsequently, logK(pw) in pure water was determined as the intercept of linear regression of the logK(pm )with the corresponding methanol mole fractions. LogK(pw) were determined for phthalates, musks, organo phosphorus flame-retardants, chlorobenzenes, pesticides, some PCBs and a number of miscellaneous compounds. The median standard error and 95% confidence interval of the measured logK(pw) was 0.06 and 0.13, respectively. The overall relationship between K-pw and K(ow )seems insufficient to predict K(pw )for unknown compounds. Prediction may work within a group of compounds with similar nature, e.g. homologues but HCH isomers having the same K-ow exhibit K pv , ranging over an order of magnitude. Long alkyl-chain phthalates and tris(2-ethylhexyl) phosphate; all having a molecular volume &gt;400 angstrom(3), deviated the most from the K-pw -K-ow relationship.

Název v anglickém jazyce

Silicone-water partition coefficients determined by cosolvent method for chlorinated pesticides, musks, organo phosphates, phthalates and more

Popis výsledku anglicky

To further support implementation of monitoring by passive sampling, robust sampler-water partition coefficients (K-pw) are required to convert data from passive sampler into aqueous phase concentrations. In this work silicone-water partition coefficients were determined for similar to 80 hydrophobic organic contaminants using the cosolvent method. Partition coefficients (K-pm) were measured in pure water and water-methanol mixtures up to a methanol mole fraction of 0.3 (50% v/v). Subsequently, logK(pw) in pure water was determined as the intercept of linear regression of the logK(pm )with the corresponding methanol mole fractions. LogK(pw) were determined for phthalates, musks, organo phosphorus flame-retardants, chlorobenzenes, pesticides, some PCBs and a number of miscellaneous compounds. The median standard error and 95% confidence interval of the measured logK(pw) was 0.06 and 0.13, respectively. The overall relationship between K-pw and K(ow )seems insufficient to predict K(pw )for unknown compounds. Prediction may work within a group of compounds with similar nature, e.g. homologues but HCH isomers having the same K-ow exhibit K pv , ranging over an order of magnitude. Long alkyl-chain phthalates and tris(2-ethylhexyl) phosphate; all having a molecular volume &gt;400 angstrom(3), deviated the most from the K-pw -K-ow relationship.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/GA15-16512S" target="_blank" >GA15-16512S: Výzkum akumulace persistentních bioakumulativních toxických organických látek do vodních organismů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemosphere

ISSN

0045-6535

e-ISSN

—

Svazek periodika

210

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

662-671

Kód UT WoS článku

000447112600075

EID výsledku v databázi Scopus

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