Evaluation of passive samplers with neutral or ion-exchange polymer coatings to determine freely dissolved concentrations of the basic surfactant lauryl diethanolamine: Measurements of acid dissociation constant and organic carbon-water sorption coefficient

F. Wang; Y. Chen; J.L.M. Hermens; S.T.J. Droge

doi:10.1016/j.chroma.2013.09.041

Evaluation of passive samplers with neutral or ion-exchange polymer coatings to determine freely dissolved concentrations of the basic surfactant lauryl diethanolamine: Measurements of acid dissociation constant and organic carbon-water sorption coefficient

F. Wang, Y. Chen, J.L.M. Hermens, S.T.J. Droge

extern

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

A passive sampler tool (solid-phase microextraction, SPME) was optimized to measure freely dissolved concentrations (Cw,free) of lauryl diethanolamine (C12-DEA). C12-DEA can be protonated and act as a cationic surfactant. From the pH-dependent sorption to neutral SPME coatings (polyacrylate and PDMS), a pKa of 8.7 was calculated, which differs more than two units from the value of 6.4 reported elsewhere. Polyacrylate coated SPME could not adequately sample largely protonated C12-DEA in humic acid solutions of pH 6. A new hydrophobic SPME coating with cation-exchange properties (C18/SCX) sorbed C12-DEA 100 fold stronger than polyacrylate, because it specifically sorbs protonated C12-DEA species. The C18/SCX-SPME fiber showed linear calibration isotherms in a concentration range of

Original language	English
Pages (from-to)	8-14
Number of pages	7
Journal	Journal of Chromatography A
Volume	1315
DOIs	https://doi.org/10.1016/j.chroma.2013.09.041
Publication status	Published - 2013

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Wang, F., Chen, Y., Hermens, J. L. M., & Droge, S. T. J. (2013). Evaluation of passive samplers with neutral or ion-exchange polymer coatings to determine freely dissolved concentrations of the basic surfactant lauryl diethanolamine: Measurements of acid dissociation constant and organic carbon-water sorption coefficient. Journal of Chromatography A, 1315, 8-14. https://doi.org/10.1016/j.chroma.2013.09.041

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title = "Evaluation of passive samplers with neutral or ion-exchange polymer coatings to determine freely dissolved concentrations of the basic surfactant lauryl diethanolamine: Measurements of acid dissociation constant and organic carbon-water sorption coefficient",

abstract = "A passive sampler tool (solid-phase microextraction, SPME) was optimized to measure freely dissolved concentrations (Cw,free) of lauryl diethanolamine (C12-DEA). C12-DEA can be protonated and act as a cationic surfactant. From the pH-dependent sorption to neutral SPME coatings (polyacrylate and PDMS), a pKa of 8.7 was calculated, which differs more than two units from the value of 6.4 reported elsewhere. Polyacrylate coated SPME could not adequately sample largely protonated C12-DEA in humic acid solutions of pH 6. A new hydrophobic SPME coating with cation-exchange properties (C18/SCX) sorbed C12-DEA 100 fold stronger than polyacrylate, because it specifically sorbs protonated C12-DEA species. The C18/SCX-SPME fiber showed linear calibration isotherms in a concentration range of",

author = "F. Wang and Y. Chen and J.L.M. Hermens and S.T.J. Droge",

year = "2013",

doi = "10.1016/j.chroma.2013.09.041",

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journal = "Journal of Chromatography A",

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Wang, F, Chen, Y, Hermens, JLM & Droge, STJ 2013, 'Evaluation of passive samplers with neutral or ion-exchange polymer coatings to determine freely dissolved concentrations of the basic surfactant lauryl diethanolamine: Measurements of acid dissociation constant and organic carbon-water sorption coefficient', Journal of Chromatography A, vol. 1315, pp. 8-14. https://doi.org/10.1016/j.chroma.2013.09.041

Evaluation of passive samplers with neutral or ion-exchange polymer coatings to determine freely dissolved concentrations of the basic surfactant lauryl diethanolamine: Measurements of acid dissociation constant and organic carbon-water sorption coefficient. / Wang, F.; Chen, Y.; Hermens, J.L.M. et al.
In: Journal of Chromatography A, Vol. 1315, 2013, p. 8-14.

Research output: Contribution to journal › Article › Academic › peer-review

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Wang F, Chen Y, Hermens JLM, Droge STJ. Evaluation of passive samplers with neutral or ion-exchange polymer coatings to determine freely dissolved concentrations of the basic surfactant lauryl diethanolamine: Measurements of acid dissociation constant and organic carbon-water sorption coefficient. Journal of Chromatography A. 2013;1315:8-14. doi: 10.1016/j.chroma.2013.09.041