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Analysis of freely dissolved alcohol ethoxylate homologues in various seawater matrixes using solid-phase microextraction.
Anal Chem. 2007 Apr 01; 79(7):2885-91.AC

Abstract

Solid-phase microextraction fibers (SPME) were tested as tools to determine freely dissolved alcohol ethoxylate (AE) surfactants in seawater matrixes. Partitioning of a wide range of AE homologues into a 35-mum polyacrylate fiber coating was linearly related to aqueous concentrations as low as submicrograms per liter, with high reproducibility. The exposure time needed to reach equilibrium between aqueous phase and the SPME fiber depended on the fiber-water partitioning coefficient (Kfw) of the AE homologue. Specific attention was given to the influence of various matrixes on the analysis via SPME. The presence of sediment increases the uptake kinetics of AE homologues for which diffusion in the aqueous phase is rate limiting. The Kfw in equilibrated systems was not affected by the presence of other homologues, micelles, or varying amounts of sediment phase. SPME is therefore a suitable tool for analysis of AE in sorption studies and sediment toxicity tests. A strong linear relation was observed between Kfw and the hydrophobicity of the AE homologue, using estimated octanol-water partition coefficients. This relation can be used to predict the partitioning coefficient of any AE homologue to the SPME fiber, which facilitates the analysis of complex mixtures.

Authors+Show Affiliations

Institute for Risk Assessment Sciences, Utrecht University, Yalelaan 2, 3584 CL Utrecht, the Netherlands. S.T.J.Droge@iras.uu.nlNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17338502

Citation

Droge, Steven T J., et al. "Analysis of Freely Dissolved Alcohol Ethoxylate Homologues in Various Seawater Matrixes Using Solid-phase Microextraction." Analytical Chemistry, vol. 79, no. 7, 2007, pp. 2885-91.
Droge ST, Sinnige TL, Hermens JL. Analysis of freely dissolved alcohol ethoxylate homologues in various seawater matrixes using solid-phase microextraction. Anal Chem. 2007;79(7):2885-91.
Droge, S. T., Sinnige, T. L., & Hermens, J. L. (2007). Analysis of freely dissolved alcohol ethoxylate homologues in various seawater matrixes using solid-phase microextraction. Analytical Chemistry, 79(7), 2885-91.
Droge ST, Sinnige TL, Hermens JL. Analysis of Freely Dissolved Alcohol Ethoxylate Homologues in Various Seawater Matrixes Using Solid-phase Microextraction. Anal Chem. 2007 Apr 1;79(7):2885-91. PubMed PMID: 17338502.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Analysis of freely dissolved alcohol ethoxylate homologues in various seawater matrixes using solid-phase microextraction. AU - Droge,Steven T J, AU - Sinnige,Theo L, AU - Hermens,Joop L M, Y1 - 2007/03/06/ PY - 2007/3/7/pubmed PY - 2007/6/7/medline PY - 2007/3/7/entrez SP - 2885 EP - 91 JF - Analytical chemistry JO - Anal. Chem. VL - 79 IS - 7 N2 - Solid-phase microextraction fibers (SPME) were tested as tools to determine freely dissolved alcohol ethoxylate (AE) surfactants in seawater matrixes. Partitioning of a wide range of AE homologues into a 35-mum polyacrylate fiber coating was linearly related to aqueous concentrations as low as submicrograms per liter, with high reproducibility. The exposure time needed to reach equilibrium between aqueous phase and the SPME fiber depended on the fiber-water partitioning coefficient (Kfw) of the AE homologue. Specific attention was given to the influence of various matrixes on the analysis via SPME. The presence of sediment increases the uptake kinetics of AE homologues for which diffusion in the aqueous phase is rate limiting. The Kfw in equilibrated systems was not affected by the presence of other homologues, micelles, or varying amounts of sediment phase. SPME is therefore a suitable tool for analysis of AE in sorption studies and sediment toxicity tests. A strong linear relation was observed between Kfw and the hydrophobicity of the AE homologue, using estimated octanol-water partition coefficients. This relation can be used to predict the partitioning coefficient of any AE homologue to the SPME fiber, which facilitates the analysis of complex mixtures. SN - 0003-2700 UR - https://www.unboundmedicine.com/medline/citation/17338502/Analysis_of_freely_dissolved_alcohol_ethoxylate_homologues_in_various_seawater_matrixes_using_solid_phase_microextraction_ L2 - https://dx.doi.org/10.1021/ac0620260 DB - PRIME DP - Unbound Medicine ER -