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J Chromatogr A

Title:		Microwave-assisted synthesis of porphyrin conjugated microporous polymers for microextraction of volatile organic acids in tobaccos
Author(s):		Peng Y; Huang M; Hu Y; Li G; Xia L;
Address:		"School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China. School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China. Electronic address: ceshyl@mail.sysu.edu.cn. School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China. Electronic address: cesgkl@mail.sysu.edu.cn"
Journal Title:		J Chromatogr A
Year:		2019
Volume:		20190216
Issue:
Page Number:		45 - 53
DOI:		10.1016/j.chroma.2019.02.038
ISSN/ISBN:		1873-3778 (Electronic) 0021-9673 (Linking)
Abstract:		"Conjugated microporous polymers (CMPs) with permanent microporosity and extended p-conjugated skeletons have recently shown the fascinating application in separation and enrichment. In this report, porphyrin CMP that possessed microporous structure and nitrogen-rich pyrrole building blocks was successfully synthesized by microwave-assisted method. Then, a novel coating based on porphyrin CMP was fabricated on silica fiber for efficient enrichment volatile organic acids (VOAs). The simulation showed the coating exhibited strong interaction with volatile organic acids based on charge transfer interaction, hydrogen bond and size effect. Hence, we proposed a method for determination of volatile organic acids in tobaccos by headspace solid-phase microextraction (HS-SPME) with porphyrin CMP coating by gas chromatography-mass spectrometry. The results showed that the coating provided high enrichment factors for VOAs ranging from 66,657 to 133,970 and low limits of detection from 4.6 to 22 ng/L. A good linearity was observed for propionic acid and crotonic acid ranging from 0.050 to 8.0 mug/L, 2-methylheptanoic acid ranging from 0.063 to 1.5 mug/L, others ranging from 0.025 to 3.0 mug/L with the determination coefficient (R(2)) between 0.9900 and 0.9980. The strategy for determination of volatile compounds in complex solid samples was successfully applied to the analysis of volatile organic acids in tobacco leaves. The results showed that the method was accurate and reliable"
Keywords:		"Chemistry Techniques, Analytical/*methods Gas Chromatography-Mass Spectrometry *Microwaves Polymers/*chemical synthesis Porphyrins/*chemistry Pyrroles/chemistry *Solid Phase Microextraction Tobacco/*chemistry Volatile Organic Compounds/*isolation & purifi;"
Notes:		"MedlinePeng, Yi Huang, Manyan Hu, Yuling Li, Gongke Xia, Ling eng Netherlands 2019/02/26 J Chromatogr A. 2019 Jun 7; 1594:45-53. doi: 10.1016/j.chroma.2019.02.038. Epub 2019 Feb 16"