| Autor: |
Song XL; College of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang 277160, China. sxl0539@126.com., Liu YQ; College of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang 277160, China. sxl0539@126.com., He FY; College of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang 277160, China. sxl0539@126.com., Wu YY; College of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang 277160, China. sxl0539@126.com., Wang DD; College of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang 277160, China. sxl0539@126.com., Lv H; College of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang 277160, China. sxl0539@126.com., Wang XS; College of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang 277160, China. sxl0539@126.com., Sun ZG; College of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang 277160, China. sxl0539@126.com., Cheng CL; College of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang 277160, China. sxl0539@126.com., Liao KC; College of Food Science and Pharmaceutical Engineering, Zaozhuang University, Zaozhuang 277160, China. sxl0539@126.com., Chen Y; Department of Criminal Science and Technology, Shandong Police College, Jinan 250014, China. |
| Abstrakt: |
The efficient extraction of phthalic acid esters (PAEs) is challenging due to their extremely low concentration, complicated matrices and hydrophilicity. Herein, hollow microspheres, as an ideal coating, possess significant potential for solid-phase microextraction (SPME) due to their fascinating properties. In this study, multiwalled carbon nanotube hollow microspheres (MWCNT-HMs) were utilized as a fiber coating for the SPME of PAEs from tea beverages. MWCNT-HMs were obtained by dissolving the polystyrene (PS) cores with organic solvents. Interestingly, MWCNT-HMs well maintain the morphology of the MWCNTs@PS precursors. The layer-by-layer (LBL) assembly of MWCNTs on PS microsphere templates was achieved through electrostatic interactions. Six PAEs, di-ethyl phthalate (DEP), di-iso-butyl phthalate (DIBP), di- n -butyl phthalate (DBP), benzyl butyl phthalate (BBP), di-2-ethylhexyl phthalate (DEHP) and di- n -octyl phthalate (DOP), were selected as target analytes for assessing the efficiency of the coating for SPME. The stirring rate, sample solution pH and extraction time were optimized by using the Box-Behnken design. Under optimal working conditions, the proposed MWCNT-HMs/SPME was coupled with gas chromatography-tandem mass spectrometry (GC-MS/MS) to achieve high enrichment factors (118-2137), wide linearity (0.0004-10 μg L -1 ), low limits of detection (0.00011-0.0026 μg L -1 ) and acceptable recovery (80.2-108.5%) for the detection of PAEs. Therefore, the MWCNT-HM coated fibers are promising alternatives in the SPME method for the sensitive detection of PAEs at trace levels in tea beverages. |
