Quantification of solute-solute interactions using negligible-depletion solid phase microextraction: Measuring the affinity of estradiol to bulk organic matter

Neale, Peta. A., Escher, Beate. I. and Schäfer, Andrea. I. (2008) Quantification of solute-solute interactions using negligible-depletion solid phase microextraction: Measuring the affinity of estradiol to bulk organic matter. Environmental Science & Technology, 42 8: 2886-2892. doi:10.1021/es0717313


Author Neale, Peta. A.
Escher, Beate. I.
Schäfer, Andrea. I.
Title Quantification of solute-solute interactions using negligible-depletion solid phase microextraction: Measuring the affinity of estradiol to bulk organic matter
Journal name Environmental Science & Technology   Check publisher's open access policy
ISSN 0013-936X
Publication date 2008-01-24
Year available 2008
Sub-type Article (original research)
DOI 10.1021/es0717313
Open Access Status
Volume 42
Issue 8
Start page 2886
End page 2892
Total pages 7
Place of publication Washington, D.C.
Publisher American Chemical Society
Language eng
Subject 05 Environmental Sciences
0502 Environmental Science and Management
Abstract The interaction of trace organic contaminants with bulk organic matter has implications for the transport and behavior of organic trace contaminants within the aquatic environment as well as water and wastewater treatment processes. Partition coefficients (KOM) of the steroidal trace organic contaminant estradiol were quantified for environmentally relevant concentrations of bulk organic matter (12.5 mg C/L) using a full mass balance form of solid-phase microextraction (SPME). The results indicated that the method is successful and can be used at environmental concentrations. Estradiol had the greatest affinity for bulk organic matter that contained phenolic and benzoic acid ester groups, namely tannic acid, compared to organics containing predominately carboxylic functional groups. The solution chemistry (pH) was found to influence the interaction, as estradiol had a lower affinity for negatively charged and hydrophilic bulk organic matter. The partition coefficients determined using SPME were consistent with partition coefficients derived using solubility enhancement and fluorescence quenching measurements, confirming that SPME is a powerful technique to quantify the affinity of estradiol for low concentrations of bulk organic matter and trace contaminants. Further, this novel method can be applied to a range of trace contaminants.
Keyword Dissolved Organic-matter
Partition Coefficient
Estradiol
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
National Research Centre for Environmental Toxicology Publications
 
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Created: Fri, 26 Jun 2009, 22:02:13 EST by Professor Beate Escher on behalf of National Res Centre For Environmental Toxicology