共查询到17条相似文献,搜索用时 93 毫秒
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食用油中多环芳烃的研究进展 总被引:2,自引:0,他引:2
多环芳烃(PAHs)是指2个或2个以上苯环以稠环形式相连的一类化合物,具有基因毒性和致癌性.对食用油中PAHs的来源、检测方法及控制和脱除方法进行了详尽的阐述,并指出PAHs前处理方法和控制、脱除方法是未来的研究方向. 相似文献
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多环芳烃(polycyclic aromatic hydrocarbons, PAHs)是造成食品污染的痕量危害物质, 精确和快速的检测食品中的痕量多环芳烃, 是食品安全重要的技术保障。本文概括了易受PAHs污染的食品类型, 综述了食品中PAHs的主要检测技术及其的研究进展。检测技术主要包括色谱检测、光谱检测和免疫学检测方法, 其中色谱检测高效液相色谱(high performance liquid chromatography, HPLC)和气相色谱-质谱(gas chromatography-mass spectrometer, GC-MS)是食品中PAHs的主流检测方法, 荧光光谱法、表面增强拉曼光谱法光谱检测和免疫学检测在食品PAHs检测中也已常见, 免疫学检测法基于其快速和现场性特点, 显示出极强的应用前景潜力。并对未来的研究趋势进行展望。 相似文献
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水产品中多环芳烃分析方法研究进展 总被引:1,自引:0,他引:1
随着水环境污染的加剧,水产品的质量安全问题日益成为社会关注的焦点。文中从提取、净化和测定3个方面回顾总结了近年来国内外报道的水产品中多环芳烃的分析方法,重点介绍了索氏提取法、超声波提取法、微波辅助提取法、加速溶剂提取法、基质固相分散萃取法、超临界流体提取法等样品前处理方法和气相色谱法、气相色谱-质谱法、高效液相色谱法等仪器测定方法,并对这些方法的优缺点和局限性进行了比较,以便研究者能在此基础上进一步改进和发展。最后,对水产品中多环芳烃分析方法的未来发展趋势进行了展望。 相似文献
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近年来,食用油中多环芳烃的检出多有报道,其安全问题备受社会关注。多环芳烃作为一类复杂的高亲脂性有机污染物,具有致畸致癌性,易在食用油的生产加工贮存过程中残留,对人体健康造成危害。因此,开发快速准确的分析方法检测食用油中的多环芳烃对于认识和应对食用油中多环芳烃的危害有着重要的理论和实践价值,其中分析检测过程的关键环节是选择合适的前处理方法。本文首先对食用油脂中多环芳烃进行概述,同时重点综述了近年来检测食用油中多环芳烃的常用样品前处理方法,并比较了不同前处理方法的优缺点,最后对未来多环芳烃检测方法的发展方向进行了展望,以期为开发更高效的油脂中多环芳烃检测的前处理方法提供参考。 相似文献
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Zun Wang Ken Ng Robyn Dorothy Warner Regine Stockmann Zhongxiang Fang 《Comprehensive Reviews in Food Science and Food Safety》2022,21(2):1598-1626
Polycyclic aromatic hydrocarbons (PAHs) are a large group of carcinogenic compounds. PAHs are ubiquitous in the environment and food, thus human beings may be exposed to PAHs through ingestion (water and food), inhalation (air and smoking), and skin contact in daily life. Dietary intake is the major source of exposure to PAHs in humans. Significant and harmful levels of PAHs can be generated during food processing and cooking. Although the formation of PAHs during processing is almost unavoidable, the levels can be diminished with reduction strategies. This review aims to provide comprehensive insights into the mechanisms underlying the formation of PAHs and factors influencing their formation in processed foods. The strategy for the reduction of PAHs including change in ingredients (i.e., reducing fat content), pretreatment conditions (i.e., reducing the pH), processing methods and parameters (i.e., reducing processing temperature and time), and packaging and storage conditions, are discussed. Potential novel strategies for PAH reduction are also identified and the feasibility is evaluated. 相似文献
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The presence of polycyclic aromatic hydrocarbons (PAH) in smoked cheeses of different origin was studied. The samples were subjected to an initial extraction of fat and an alkaline treatment, extracted with cyclohexane, cleaned up by means of solid-phase extraction tubes, and analyzed by gas chromatography/mass spectrometry (GC/MS) operating in selective ion-monitoring mode (SIM). The results revealed the presence of numerous polycyclic aromatic hydrocarbons in the exterior zone of the samples, some of them with methyl groups. In all cases, the concentrations of compounds of low molecular weight were much higher than those of high molecular weight. Polycyclic aromatic hydrocarbons with varying degrees of carcinogenicity were identified, including benzo(a)pyrene in concentrations, which, although they did not exceed the limit established for this compound in the rind of ripened cheeses, do exceed the limit of 0.03 microg/kg fixed for other foods smoked with smoke flavorings. Significant differences in the number and concentration of PAH in smoked cheese also were observed from rind to interior, the rind being the most contaminated zone. 相似文献
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天然生育酚中痕量多环芳烃脱除工艺的研究 总被引:1,自引:0,他引:1
采用活性炭吸附法脱除天然生育酚中的多环芳烃(PAHs),考察了脱除溶剂、活性炭种类、搅拌时间、温度、活性炭用量、脱除次数对多环芳烃脱除率的影响。结果表明,用乙醇(分析纯)溶剂溶解生育酚(液固比为5:1),加入10%的HC-2型活性炭,在20℃下搅拌45min,对PAHs可以达到较好的脱除效果(对轻PAHs的脱除率达到48%以上,对重PAHs的脱除率达到98%以上,对总PAHs的脱除率达到88%以上),重PAHs的残留量为5.22ng/g,轻PAHs的残留量为86.22ng/g。 相似文献