Determination of 1,3-dichloro-2-propanol and 3-chloro-1,2-propandiol in soy sauce by headspace derivatization solid-phase microextraction combined with gas chromatography–mass spectrometry
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| Title: | Determination of 1,3-dichloro-2-propanol and 3-chloro-1,2-propandiol in soy sauce by headspace derivatization solid-phase microextraction combined with gas chromatography–mass spectrometry |
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| Authors: | Lee, Maw-Rong1 mrlee@dragon.nchu.edu.tw, Chiu, Tzu-Chun1, Dou, Jianpeng1,2 |
| Source: | Analytica Chimica Acta. May2007, Vol. 591 Issue 2, p167-172. 6p. |
| Subjects: | Chemical reactions, Chromatographic analysis, Chemical processes, Mass spectrometry |
| Abstract: | Abstract: This study proposes a method for identifying 1,3-dichloro-2-propanol and 3-chloro-1,2-propandiol in aqueous matrices by using headspace on-fiber derivatization following solid-phase microextraction combined with gas chromatography–mass spectrometry. The optimized SPME experimental procedures for extracting 1,3-dichloro-2-propanol and 3-chloro-1,2-propandiol in aqueous solutions involved a 85μm polyacrylate-coated fiber at pH 6, a sodium chloride concentration of 0.36gmL−1, extraction at 50°C for 15min and desorption of analytes at 260°C for 3min. Headspace derivatization was conducted in a laboratory-made design with N-methyl-N-(trimethylsilyl)-trifluoroacetamide vapor following solid-phase microextraction by using 3μL N-methyl-N-(trimethylsilyl)-trifluoroacetamide at an oil bath temperature of 230°C for 40s. This method had good repeatability (R.S.D.s≤19%, n =8) and good linearity (r 2 ≥0.9972) for ultrapure water and soy sauce samples that were spiked with two analytes. Detection limits were obtained at the ngmL−1. The result demonstrated that headspace on-fiber derivatization following solid-phase microextraction was a simple, fast and accurate technique for identifying trace 1,3-dichloro-2-propanol and 3-chloro-1,2-propandiol in soy sauce. [Copyright &y& Elsevier] |
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| Database: | Engineering Source |
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