食品接触材料样品前处理和检测方法研究进展

近年来,食品接触材料中有害物质迁移导致的食品安全问题已经引起了社会各界的广泛关注。食品接触材料中有害物质具有种类多、来源广、成分复杂、未知性强等特点,选择合适的样品前处理方法结合快速、灵敏、准确以及多组分同时检测的分析检测方法是食品接触材料安全评价的关键。本文简要介绍了食品接触材料中有害物质的危害性,食品接触材料种类以及食品接触材料中非有意添加物的来源,重点评述了食品接触材料的样品前处理方法和分析检测方法,并对食品接触材料分析检测存在的问题及未来的发展趋势进行了分析和展望。     

外卖食品接触材料中有害物质迁移研究进展

近年来外卖行业发展迅速,随之产生的食品接触材料安全问题也不容忽视。食品接触材料（FCM）由于反应副产物、低聚物、降解过程、包装材料与食品之间的化学反应或生产所用原料中的杂质而含有有害物质,在与食品接触时这些物质会迁移至食品中从而对人体造成危害。常见外卖食品接触材料为塑料与纸制品,其中含有塑化剂、抗氧化剂、光稳定剂等添加剂,而传统中式食品又以高温、高油食品为主,在使用一次性餐具盛装该类外卖食品时,添加剂极可能迁移到相关外卖食品中,具有较大的安全风险与隐患。本文对常见外卖食品接触材料中主要有害物质的性质、检测方法与迁移研究现状进行简述,了解外卖食品接触材料中有害物质的迁移情况,从而给外卖食品接触材料的安全监管提供一定的参考依据。     

食品接触纸质包装材料中有害物质的迁移及潜在危害的研究进展

食品接触用纸是指在正常或可预见的使用条件下,预期与食品接触的各种纸及制品,包括涂蜡纸、纸浆模塑制品及食品加工烹饪用纸等。由于在加工处理过程中需要加入各种添加剂,其本身所含的助剂、单体、低聚体、降解物等化学残留物就可能通过吸收、溶解、扩散等途径迁移到食品中,污染食品,造成一定的食品安全隐患。本文通过对比国内外相关法规与标准对纸质食品接触材料检测项目、限量指标和检测标准等方面的规定,对食品接触纸质包装材料中有害物质的迁移及其潜在危害进行总结,并对食品接触纸质包装材料中有害物质全氟辛烷磺酸(perfluorooctane sulfonates,PFOS)、全氟辛酸(perfluorooctanoic acid,PFOA)、荧光增白剂、特定芳香胺(specific aromatic amines,PAAs)、甲醛、五氯苯酚、丙烯酰胺、重金属、光引发剂的迁移及其潜在危害进行综述。     

食品塑料包装材料有害物质分析方法

介绍了食品塑料包装中增塑剂、抗氧化剂等有害物质的来源以其危害,简述了食品塑料包装材料中有害物质的检测方法,以及食品塑料包装材料中有害物质迁移量的检测方法。     

纸质食品接触材料中常见重金属检测方法分析

纸质材料是当前传统食品接触材料之一,用途广泛,但在制造过程中添加的颜料、助剂、油墨等可能造成严重的重金属污染,危害人体健康。本文从实际纸质食品接触材料的常见重金属检测研究入手,深入分析其检测方法,以供参考。     

食品有毒有害物质分析研究

食品中有毒有害物质是存在于食品或食品原料中对人体有毒的或者具有潜在危害性的物质。食品中有毒有害物质严重危害食品安全,可引起人体代谢紊乱,进而导致疾病的产生。近年来由食品中有毒有害物质导致的食物中毒事件层出不穷,引起各国政府、国际组织、学术机构和消费者的高度重视。本文对食品中有毒有害物质的种类、危害及污染现状及检测方法进行了综述,并对食品中有毒有害物质的未来工作进行展望。尽管我国食品中有毒有害物质仍然影响我国食品安全,但是随着我国检测水平、加工技术及监管力度的迅速提升,食品中有毒有害物质将得到有效控制,极大地提高我国食品安全水平。     

食品接触材料中邻苯二甲酸酯类物质迁移的 研究进展

邻苯二甲酸酯类物质是食品接触材料中广泛使用的增塑剂,具有神经毒性和生殖发育毒性。接触材料中添加的邻苯二甲酸酯类物质在与食品的长期接触过程中会向食品中迁移,其安全性直接影响食品安全和消费者的健康。因此,研究食品接触材料中邻苯二甲酸酯的迁移对保障食品安全具有十分重要的意义。本文介绍了食品中邻苯二甲酸酯的污染情况,综述了国内外食品接触材料中邻苯二甲酸酯类物质的迁移试验研究方法、模拟物选择、分析检测方法及近年来的迁移研究现状,提出了目前研究存在的主要问题同时对今后的研究趋势和方向进行了展望。建议进一步加强对脂肪性模拟液、检测方法、迁移模型及迁移机制的研究,以期为准确评估食品接触材料的安全性、保障食品质量安全提供理论基础。     

食品接触材料中有害物质迁移分析

<正>我国对食品包装继续研究的过程中只局限在对塑料包装物的研究,而国外在包装设计的过程中会考虑到食品接触材料中有害物质迁移的情况,不难发现国外食品安全问题涉及方面较为领先,所以我们国家要想更好地做好食品安全工作也需要对食品接触材料中的有害物质迁移做出全方位的分析,只有这样才可以为我国食品包装行业物质质量检测提供较为科学的数据,从而保证我国食品安全问题得到有效控制。1食品接触材料安全问题解析     

家庭怎样为食品减毒（一）

为食品减毒是因为食品中含有有害物质。食品中有害物质主要来源于食品中天然存在的有毒成分和食品在生产、加工、运输、销售、贮存以及烹饪等过程中不适当的添加、污染和产生的有毒有害物质。当食品中有毒有害物质的量达到一定程度时,可能会对人体产生急性危害或潜在性危害,所以我们应设法将有毒成分去掉或减少到食用安全的程度。     

家庭怎样为食品减毒（二）

为食品减毒是因为食品中含有有害物质。食品中有害物质主要来源于食品中天然存在的有毒成分和食品在生产、加工、运输、销售、贮存以及烹饪等过程中不适当的添加、污染和产生的有毒有害物质。当食品中有毒有害物质的量达到一定程度时,可能会对人体产生急性危害或潜在性危害．所以我们应设法将有毒成分去掉或减少到食用安全的程度。     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

An internet compendium of analytical methods and spectroscopic information for monomers and additives used in food packaging plastics

An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

Tests of potential functional barriers for laminated multilayer food packages. Part I: Low molecular weight permeants

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the     

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China（PEIAC）＇s statistics to the plate manufucturer in China, in 2013, the actual offset plate production has reached 346 million square meters in China. Among them, the CTP production volume was 245 million square meters, up by 11% than that of last year; the total sales of the CTP plate was 239 million square meters, up by 13%.     

Preparatory Work of Print China 2015 is Going Smoothly

正Held at Guangdong Modern International Exhibition Center,Print China 2015 will cover 7exhibition halls,besides the original Hall No.3,4,5,6,7,the newly built F zone of Hall 3 will be used too.The total area will be140,000 square meters.Hall 3:Offset and large printing equipment,package printing equipment,post press