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Analyzing freely dissolved concentrations of cationic surfactant utilizing ion-exchange capability of polyacrylate coated solid-phase microextraction fibers.
J Chromatogr A. 2012 Aug 24; 1252:15-22.JC

Abstract

A 7-μm polyacrylate (PA) coated fiber was successfully employed to determine freely dissolved concentrations of cationic surfactants by solid-phase microextraction (SPME) and utilizing the capability of the PA-coating to sorb organic cations via ion-exchange at carboxylic groups. Measured fiber-water partitioning coefficients (K(fw)) were constant below a fiber loading of 2mmol per liter polyacrylate, allowing for simple and accurate analysis in a concentration range that is relevant from a risk assessment point of view. Ion-exchange was confirmed to be the main sorption mechanism because of a decreasing K(fw) with either higher CaCl(2) concentrations or lower pH, and maximum fiber uptake at the polyacrylate cation-exchange capacity (CEC, at 30mmol/L PA). Fiber-water sorption isotherms were established in various aqueous media in toxicological relevant concentrations. The developed SPME method has a high potential for application in ecotoxicological studies, as demonstrated in sorption studies with humic acid in different electrolyte solutions at aqueous concentrations down to the sub nM range. Cationic surfactant sorption affinities for humic acid also depend on medium composition but are orders of magnitude higher than to the PA fiber on a sorbent weight basis.

Authors+Show Affiliations

Institute for Risk Assessment Sciences, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands. y.chen@uu.nlNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

22818738

Citation

Chen, Yi, et al. "Analyzing Freely Dissolved Concentrations of Cationic Surfactant Utilizing Ion-exchange Capability of Polyacrylate Coated Solid-phase Microextraction Fibers." Journal of Chromatography. A, vol. 1252, 2012, pp. 15-22.
Chen Y, Droge ST, Hermens JL. Analyzing freely dissolved concentrations of cationic surfactant utilizing ion-exchange capability of polyacrylate coated solid-phase microextraction fibers. J Chromatogr A. 2012;1252:15-22.
Chen, Y., Droge, S. T., & Hermens, J. L. (2012). Analyzing freely dissolved concentrations of cationic surfactant utilizing ion-exchange capability of polyacrylate coated solid-phase microextraction fibers. Journal of Chromatography. A, 1252, 15-22. https://doi.org/10.1016/j.chroma.2012.06.080
Chen Y, Droge ST, Hermens JL. Analyzing Freely Dissolved Concentrations of Cationic Surfactant Utilizing Ion-exchange Capability of Polyacrylate Coated Solid-phase Microextraction Fibers. J Chromatogr A. 2012 Aug 24;1252:15-22. PubMed PMID: 22818738.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Analyzing freely dissolved concentrations of cationic surfactant utilizing ion-exchange capability of polyacrylate coated solid-phase microextraction fibers. AU - Chen,Yi, AU - Droge,Steven T J, AU - Hermens,Joop L M, Y1 - 2012/07/03/ PY - 2012/06/05/received PY - 2012/06/22/accepted PY - 2012/7/24/entrez PY - 2012/7/24/pubmed PY - 2012/11/14/medline SP - 15 EP - 22 JF - Journal of chromatography. A JO - J Chromatogr A VL - 1252 N2 - A 7-μm polyacrylate (PA) coated fiber was successfully employed to determine freely dissolved concentrations of cationic surfactants by solid-phase microextraction (SPME) and utilizing the capability of the PA-coating to sorb organic cations via ion-exchange at carboxylic groups. Measured fiber-water partitioning coefficients (K(fw)) were constant below a fiber loading of 2mmol per liter polyacrylate, allowing for simple and accurate analysis in a concentration range that is relevant from a risk assessment point of view. Ion-exchange was confirmed to be the main sorption mechanism because of a decreasing K(fw) with either higher CaCl(2) concentrations or lower pH, and maximum fiber uptake at the polyacrylate cation-exchange capacity (CEC, at 30mmol/L PA). Fiber-water sorption isotherms were established in various aqueous media in toxicological relevant concentrations. The developed SPME method has a high potential for application in ecotoxicological studies, as demonstrated in sorption studies with humic acid in different electrolyte solutions at aqueous concentrations down to the sub nM range. Cationic surfactant sorption affinities for humic acid also depend on medium composition but are orders of magnitude higher than to the PA fiber on a sorbent weight basis. SN - 1873-3778 UR - https://www.unboundmedicine.com/medline/citation/22818738/Analyzing_freely_dissolved_concentrations_of_cationic_surfactant_utilizing_ion_exchange_capability_of_polyacrylate_coated_solid_phase_microextraction_fibers_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0021-9673(12)01000-X DB - PRIME DP - Unbound Medicine ER -