NDLI: Simultaneous derivatization and microextraction of parabens in different matrices followed by GC-FID

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Simultaneous derivatization and microextraction of parabens in different matrices followed by GC-FID

Content Provider	Springer Nature Link
Author	Khoshmaram, Leila Farajzadeh, Mir Ali Marzi Khosrowshahi, Elnaz
Copyright Year	2014
Abstract	In this study, a simple, rapid, and an economical method has been proposed for the extraction, preconcentration, and determination of parabens (methyl-, ethyl-, and propylparaben) in different samples based on derivatization by acetic anhydride and preconcentration using air-assisted liquid–liquid microextraction in a single step. In this method, 1,1,2,2-tetrachloroethane (extraction solvent) containing μL-level of acetic anhydride (derivatization agent) is injected into aqueous sample containing parabens and picoline (catalyst). The mixture of aqueous and organic phases is withdrawn into a glass syringe and then injected into the test tube for several times till a turbid solution is obtained. After centrifuging, 1 μL of the sedimented phase is injected into gas chromatography-flame ionization detector. The effect of catalyst volume, derivatization agent volume, extraction solvent type and volume, ionic strength of the solution, pH, and numbers of extraction on the extraction efficiency is investigated. Under the optimal conditions, the enrichment factors and enhancement factors for the parabens were obtained in the ranges of 310–353 and 2,484–5,298, respectively. Limits of detection were between 0.18 and 8.5 µg L$^{−1}$. The method was found to be linear over the range of 10–10,000 μg L$^{−1}$ with good coefficients of determination (R $^{2}$ > 0.999). The obtained extraction recoveries ranged from 69 to 107 % and precision of the method, expressed as relative standard deviation (RSD %), was within the range of 4.0–13 %. The proposed method was successfully applied for determination of parabens in different samples such as cream, toothpaste, and mouthwash.
Starting Page	1061
Ending Page	1069
Page Count	9
File Format	PDF
ISSN	1735207X
Journal	Journal of the Iranian Chemical Society
Volume Number	12
Issue Number	6
e-ISSN	17352428
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-12-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Gas chromatography Preservatives Analytical Chemistry Physical Chemistry Biochemistry Inorganic Chemistry Derivatization Air-assisted liquid–liquid microextraction Parabens Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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