Heat‐shrink tubing as a solid‐phase microextraction coating for the enrichment and determination of phthalic acid esters |
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Authors: | Xi Luo Chengxia He Feifang Zhang Hailong Wang Bingcheng Yang Xinmiao Liang |
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Institution: | 1. School of Pharmacy, East China University of Science and Technology, , Shanghai, China;2. Luliang University, , Luliang, China |
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Abstract: | Heat‐shrink tubing, which shrinks in one plane only (its diameter) when heated, commonly used for sealing protection in electrical engineering, was found to be able to function as a solid‐phase microextraction coating. Its utility was demonstrated for the determination of phthalic acid esters in an aqueous solution combined with high‐performance liquid chromatography equipped with a UV absorbance detector. The preparation procedure was rather simple and only ~10 min was needed. The fiber cost is extremely low (~10 cent each). The parameters affecting the extraction were optimized. Heat‐shrink tubing fiber exhibited a significant enrichment effect for the three examined phthalic acid esters and up to 931‐fold enrichment factor was obtained. The limit of detection was <10 μg/L for all analytes. The operation repeatability and fiber‐to‐fiber reproducibility were 1.2–8.3 and 5.4–9.1%, respectively. It was successfully applied for the analysis of bottled drinking water with recoveries ranging from 90.1–100.5%. |
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Keywords: | Fibers Heat‐shrink tubing Phthalic acid esters Solid‐phase microextraction |
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