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J Chromatogr A

Title:		Determination of volatile organic compounds in pen inks by a dynamic headspace needle trap device combined with gas chromatography-mass spectrometry
Author(s):		Zang X; Liang W; Chang Q; Wu T; Wang C; Wang Z;
Address:		"Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China. Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China. Electronic address: wangzhi@hebau.edu.cn"
Journal Title:		J Chromatogr A
Year:		2017
Volume:		20170711
Issue:
Page Number:		27 - 34
DOI:		10.1016/j.chroma.2017.07.030
ISSN/ISBN:		1873-3778 (Electronic) 0021-9673 (Linking)
Abstract:		"Some harmful volatile organic compounds (VOCs), such as methylbenzene, ethylbenzene, xylene, chlorobenzene and bromobenzene, are the commonly found chemicals in pen inks. In this work, a dynamic headspace needle-trap device (D-HS-NTD) with a ZIF-8-derived nanoporous carbon (ZIF-8-NPC) as the adsorbent was developed for the extraction of some VOCs in different pen inks prior to GC-MS detection. The main important influencing experimental parameters including the flow rate of the purge gas N(2), extraction temperature, extraction time, desorption temperature and desorption time for the extraction were optimized to obtain a high extraction efficiency. Under the optimized conditions, a good linearity was obtained in the concentration range of 0.1-400mugkg(-1) with the correlation coefficients (r) ranging from 0.9911 to 0.9990 for the eleven VOCs. The LODs at a signal-to-noise ratio of 3 (S/N=3) were measured to be 10-20ngkg(-1) for the VOCs. The developed method was applied to determine the VOCs from 20 pen inks. The recoveries of the VOCs for the method at the spiking levels of 0.5 and 20.0mugkg(-1) fell in the range from 80.0% to 108%"
Keywords:		Adsorption Carbon/*chemistry Gas Chromatography-Mass Spectrometry/*methods *Ink Needles Porosity Sensitivity and Specificity Signal-To-Noise Ratio Surface Properties Temperature Volatile Organic Compounds/*analysis Dynamic headspace needle-trap device Gas;
Notes:		"MedlineZang, Xiaohuan Liang, Weiqian Chang, Qingyun Wu, Tong Wang, Chun Wang, Zhi eng Netherlands 2017/07/25 J Chromatogr A. 2017 Sep 1; 1513:27-34. doi: 10.1016/j.chroma.2017.07.030. Epub 2017 Jul 11"