Non-targeted analysis of unknown volatile chemicals in medical masks.
Non-targeted analysis of unknown volatile chemicals in medical masks.
复制标题
DOI：
10.1016/j.envint.2022.107122
复制
发表时间：
2022-02
影响因子：
11.8
通讯作者：
Yahui Liu;Zhijuan Wang;Wan Wang;Jiangtao Xing;Qing Zhang;Q. Ma;Q. Lv
中科院分区：
文献类型：
--
作者：
Yahui Liu;Zhijuan Wang;Wan Wang;Jiangtao Xing;Qing Zhang;Q. Ma;Q. Lv
采用顶空气相色谱-轨道阱高分辨质谱法对医用口罩中未知挥发性化学物质进行非靶向分析。针对未知物质定性分析中可能遇到的困难，从综合评分和保留指数、化学电离鉴别分子式、区分同分异构体的碎片离子细节比较、烷烃鉴别等角度，给出了几个典型案例及相应的可靠解决方案。用该方法对60种口罩中的69种挥发性物质进行了鉴定。确定的物质分为九类。烷烃、酯类、苯类和醇类是口罩中检出的前四类物质，分别占总物质的34.8%、15.9%、10.1%和7.2%。此外，还鉴定了酮类、醚类、酚类、酰胺类和其他物质。乙醇、1，4-二氯苯、甲苯、间二甲苯、戊二酸二甲酯、N，N-二甲基乙酰胺检出率较高。根据其检出率、毒性和响应强度，对鉴定的物质进行进一步过滤和筛选。最后，列出了医用口罩中的12种高风险挥发性化学物质。该研究可作为识别未知物质的参考，并为监测口罩中的挥发性化学物质和促进产品化学安全改进提供指导。
This paper reports the non-targeted analysis of unknown volatile chemicals in medical masks through headspace gas chromatography-Orbitrap high-resolution mass spectrometry. In view of the difficulties that may be encountered in the qualitative analysis of unknown substances, several typical cases and the corresponding reliable solutions are given from the perspective of comprehensive score and retention index, chemical ionization identification molecular formula, fragment ion detail comparison for distinguishing isomers, and identification of alkanes. With this method, 69 volatile substances were identified in 60 masks. The identified substances were divided into nine categories. Alkanes, esters, benzenes, and alcohols were the top four groups of substances identified in masks and accounted for 34.8%, 15.9%, 10.1%, and 7.2% of the total substances, respectively. In addition, ketones, ethers, phenolics, amides, and other substances were identified. Ethanol, 1,4-dichlorobenzene, toluene,m-xylene, dimethyl glutarate, and N,N-dimethylacetamide had high detection rates. The identified substances were further filtered and screened according to their detection rate, toxicity, and response intensity. Finally, 12 high-risk volatile chemicals in medical masks were listed. This study could serve as a reference for identifying unknown substances and a guide for monitoring volatile chemicals in masks and promoting chemical safety improvements in products.