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| Untargeted Screening and Potential Hazard Assessment of Semi-volatile Compounds in Water-borne Coating |
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| DOI： |
| KeyWord:water-borne coating gas chromatography－mass spectrometry（GC－MS） untargeted screening hazard assessment |
| Author | Institution |
| MA Hong-sheng，YANG Qing-hua，LIN Qin-bao，YAN Ling-yan，WEI Xiao-fen，WANG Yue |
1. Zhuhai Hongta Renheng Packaging Co.，Ltd.，Zhuhai ，China; 2. Packaging Engineering Institute，Jinan University，Zhuhai ，China |
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| Abstract: |
| Untargeted screening of semi-volatile compounds in three water-borne coatings was conducted by using gas chromatography－mass spectrometer（GC－MS）．Combined with retention time and NIST mass database，unknown chemicals extracted with methanol under the ultrasonic were deconvolved and determined via MS－DIAL software．63 semi-volatile compounds were tentatively identified，including aromatic hydrocarbons，carbonyl compounds and ester compounds．To highlight the chemicals of concern，substances with similar structures were quantified by external standard method．The results showed that，polymerization monomers，including 2-ethylhexyl acrylate，isooctyl acrylate and 2-ethylhexanol methacrylate were found in three water-borne coating samples．Meanwhile，added additives of different concentrations，such as ethanol，2-［2-（2-butoxyethoxy）ethoxy］-，2， 4， 7， 9-tetramethyl-5-decyne-4， 7-diol as well as potential non-intentionally added substances（NIAS），such as 2-ethylhexanol，dodecanol，dibutyl phthalate，were detected in the coating samples. Furthermore，to elucidate the potential risk source of water-borne coatings，their multiple toxicity endpoints of acute toxicity，developmental toxicity，mutagenicity，carcinogenicity and Cramer class were evaluated using toxicity estimation software tool（T.E.S.T） and VEGA QSAR．It could be found that the safety risks of water-borne coatings mainly originate from Cl，N or Si element-contained NIAS，and substances of high concern，e.g.，2-ethylhexanol，styrene and 2-ethylhexyl acrylate，while other intentionally added substances（IAS） are relatively much safer. |
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