Determination of volatile organic compounds in pen inks by a dynamic headspace needle trap device combined with gas chromatography-mass spectrometry
Determination of volatile organic compounds in pen inks by a dynamic headspace needle trap device combined with gas chromatography-mass spectrometry
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动态顶空针捕装置结合气相色谱-质谱法测定钢笔墨水中的挥发性有机化合物
DOI：
10.1016/j.chroma.2017.07.030
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发表时间：
2017
影响因子：
4.1
通讯作者：
Wang Zhi
中科院分区：
文献类型：
--
作者：
Zang Xiaohuan;Liang Weiqian;Chang Qingyun;Wu Tong;Wang Chun;Wang Zhi
一些有害的挥发性有机化合物（VOCs），如甲苯、二甲苯、氯苯和溴苯，是钢笔墨水中常见的化学物质。在这项工作中，一个动态的顶空针捕集装置（D-HS-NTD）与ZIF-8衍生的纳米多孔碳（ZIF-8-NPC）作为吸附剂的开发用于提取的一些挥发性有机化合物在不同的笔墨水GC-MS检测之前。对影响萃取效率的主要实验参数，包括吹扫气体N2流量、萃取温度、萃取时间、解吸温度和解吸时间进行了优化，以获得较高的萃取效率。在优化条件下，11种挥发性有机物在0.1 ~ 400 μg kg− 1浓度范围内线性关系良好，相关系数（r）在0.9911 ~ 0.9990之间。在信噪比为3（S/N= 3）时，VOCs的检出限为10-20 ng kg− 1。应用所开发的方法测定了20种钢笔墨水中的挥发性有机化合物。在0.5和20.0 μg kg− 1加标水平下，该方法的VOC回收率范围为80.0%-108%。
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 N2, 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 0.1–400 μg kg−1with 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 10–20 ng kg−1for 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 20.0 μg kg−1fell in the range from 80.0% to 108%.