暨南大学 包装工程研究所,广东 珠海 519070
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关伟焰,林勤保,张宜彩等.顶空固相微萃取/气相色谱-质谱联用技术结合相对气味活度值分析回收聚乙烯中的主体气味物质[J].分析测试学报,2021,40(11):1611-1618.
GUAN Wei-yan,LIN Qin-bao,ZHANG Yi-cai,et al.Analysis of Main Odor Substances in Recycled Polyethylene by HS-SPME/GC-MS with Relative Odor Activity Value[J].Journal of Instrumental Analysis,2021,40(11):1611-1618.
关伟焰,林勤保,张宜彩等.顶空固相微萃取/气相色谱-质谱联用技术结合相对气味活度值分析回收聚乙烯中的主体气味物质[J].分析测试学报,2021,40(11):1611-1618. DOI: 10.19969/j.fxcsxb.21072605.
GUAN Wei-yan,LIN Qin-bao,ZHANG Yi-cai,et al.Analysis of Main Odor Substances in Recycled Polyethylene by HS-SPME/GC-MS with Relative Odor Activity Value[J].Journal of Instrumental Analysis,2021,40(11):1611-1618. DOI: 10.19969/j.fxcsxb.21072605.
为探究回收聚乙烯的挥发性气味成分及其对总体气味的贡献,该文采用顶空固相微萃取/气相色谱-质谱联用技术(HS-SPME/GC-MS)对8种回收聚乙烯(PE)的挥发性成分进行提取和检测,通过检索NIST质谱库,结合保留指数对挥发性气味物质进行定性分析,最后利用相对气味活度值(ROAV)对其进行主体气味成分评价。萃取温度为80 ℃,平衡时间为30 min,萃取时间为40 min,萃取头为50/30 μm DVB/CAR/PDMS,色谱柱为HP-5 MS(30 m × 0.25 mm,0.25 μm)。结果表明,8种回收PE中共鉴定出47种挥发性气味物质,主要包括14种酯类、11种醇类、6种酮类、4种醛类、4种酚类、2种烷烃类、2种烯烃类、2种醚类、1种羧酸类和1种胺类,其中有31种共有成分。ROAV分析结果表明,壬醛、异佛尔酮、水杨酸戊酯、二苯醚、2-萘甲醚、苯酚和冰片是8种回收PE的主体气味物质。回收PE中的异味是限制其应用范围的重要因素之一,该研究可为回收PE的脱气除臭工艺改良提供理论依据。
In order to investigate the volatile odor components of recycled polyethylene(PE) and their contribution to the overall odor of recycled PE,the volatile odor compounds in 8 kinds of recycled PE were analyzed by headspace solid phase microextraction/gas chromatography-mass spectrometry(HS-SPME/GC-MS) coupled with retention indexs(RI).The main odor substances were evaluated by relative odor activity value(ROAV).The extraction temperature was 80 ℃,the equilibrium time was 30 min,the extraction time was 40 min,the extraction fiber was 50/30 μm DVB/CAR/PDMS and the chromatographic column was HP-5 MS(30 m × 0.25 mm,0.25 μm).Results showed that 47 odor substances in 8 kinds of recycled PE were detected,including 14 esters,11 alcohols,6 ketones,4 aldehydes,4 phenols,2 alkanes,2 olefins,2 ethers,1 carboxylic acid and 1 amine.Among the obtained odor compounds,there were 31 kinds of common ingredients. The ROAV showed that nonanal,isophorone,amyl salicylate,diphenyl ether,2-methoxynaphthalene,phenol and borneol were the main odor substances in eight kinds of recycled PE. The odor of recycled PE was one of the important factors limiting its application.This research could provide a theoretical basis for the improvement of degassing and deodorization process of recycled PE.
回收聚乙烯顶空固相微萃取/气相色谱-质谱联用主体气味物质相对气味活度值
recycled polyethyleneheadspace solid phase microextraction/gas chromatography-mass spectrometrymain odor substancesrelative odor activity value
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