指纹分析技术及其在食品中的应用

指纹分析技术是一类基于样品的某种品质特征,以指纹分析方法(如DNA指纹图谱、代谢指纹图谱、同位素指纹图谱、气味指纹图谱、光谱指纹图谱等)为手段,获得系列特征性数据资料,建立模型,最终进行统计和分类的一种技术,以快速、准确、灵敏等优点成为食品检测技术研究的热点和未来发展趋势。文章综述各类指纹分析技术的原理、应用及发展趋势,重点概述在食品溯源、食品品质检测、食品加工中化学和微生物变化中的应用,以期为今后的相关研究提供借鉴。     

气味指纹技术在肉品品质及安全检测中的应用

气味指纹技术是借助色谱、质谱以及传感器等技术手段,结合多元统计分析方法,对挥发性化合物进行分析用以表征样品信息的技术。近年来在食品中的应用领域越来越活跃,本文简要介绍气味指纹技术(odor fingerprint technique),主要包括电子鼻技术、气质联用技术及其数据处理方法,综述其在肉品品质及安全检测中的应用,具体阐述其在肉品新鲜度、风味和微生物检测中的应用。同时展望气味指纹技术在肉品品质及安全检测中的存在问题及发展前景,为更好应用该技术对肉品质量安全控制提供参考。     

气味指纹技术在水产品品质评价中的应用研究进展

气味指纹技术是一种将气体传感设备与多元统计方法相结合,用于分析食品中挥发性风味物质,表征样品信息,并对产品品质予以判断的检测技术。该技术具有无损检测、快速简便、灵活准确、结果客观等优点,现已广泛应用于水产品品质的分析检测中。该文在比较传统水产品品质评价方法主要优缺点的基础上,综述了电子鼻、电子舌、气相色谱-质谱联用等技术在水产品新鲜度鉴别、货架期预测与品质评价中的应用研究进展。文中提出将不同检测技术联合使用以克服单一检测分析的不足之处,阐明将气味指纹技术结合新型智能技术,利用其分析结果对水产品挥发性成分予以调控,提升其综合品质,扩大该技术在水产品品质评价领域中的推广应用。     

气味指纹技术在食品品质鉴别中的应用进展

气味指纹技术在食品风味品质鉴别中有很好的应用前景,着重综述电子鼻气味指纹技术在鉴别食品品质方面的优势与应用情况,并展望了这一快速鉴别新技术在食品质量与安全监测领域的应用与发展趋势。     

气味指纹分析技术在我国食品品质评价中的应用与研究

气味指纹分析技术作为一种嗅觉传感器技术,以其客观性、可靠性和重现性等优点在食品分析中得到广泛应用。本文对气味指纹分析技术的原理以及在我国食品品质评价中的应用研究进行综述,为加快国内气味指纹分析技术的发展提供一定的借鉴。     

机器人在食品工业中的发展与未来——评《多光谱食品品质检测技术与信息处理研究》

正机器人的发明和应用,方便了人们的生活和生产活动,多光谱成像技术为食品安全检测提供了更加便捷快速的方式。《多光谱食品品质检测技术与信息处理研究》即是一本有关机器学习、新型人工智能在食品品质检测中应用可行性的书籍。本文将基于《多光谱食品品质检测技术与信息处理研究》,分析机器人在食品工业中的发展与未来。越来越多的机器人走向生产一线,帮助一线工人解放双手,提高生产力、提高生产安全性。在食品这一传统行     

嗅觉可视化技术在食品品质检测中的应用

食品的品质与人类健康有着必然的联系，这使食品品质的快速、准确检测一直备受关注。嗅觉可视化技术为一种新型食品检测技术，不仅具有快速、灵敏、不易受环境影响等优点，还可通过颜色变化直观地判断食品的品质，目前被证实在多种食品品质的检测中具有可行性。然而，因周围复杂因素的影响，故嗅觉可视化技术还不能作为标准的食品质量检测方法。本文综述国内外嗅觉可视化技术的基本原理、组成及其在肉品、调味品、饮品、粮食等食品检测中的应用。以多维度视角深入分析该技术对它们的影响，总结所面临的主要问题，展望今后的发展趋势。为扩大其应用范围，实现食品安全和质量检测的功能化、智能化、信息化提供理论参考。     

表面增强拉曼光谱快速检测食品中双酚A的研究进展

准确、快速地检测双酚A(BPA)是减少食品中BPA污染的重要环节。表面增强拉曼光谱（SERS）技术作为一种新型的快速检测技术,具有无损、准确、快速、图谱指纹特征强等优点,在食品中BPA快速检测方面具有巨大潜力。本文介绍了SERS的机制及SERS技术在食品中BPA快速检测方面的应用,主要综述了不同SERS基底快速检测BPA的研究进展,以期为BPA的快速检测提供理论支撑。     

指纹图谱在食品分析中的应用研究进展

指纹图谱技术是基于样品的某种特性,采用现代分析手段得到能够代表该样品特征的色谱、光谱以及其它图谱数据资料,从而进行成分鉴定及质量控制的一种可量化手段,具有快速、灵敏、方便等优点,不仅广泛应用于中药行业,在食品来源、品质检测和真伪鉴别方面也具有巨大的应用潜力。指纹图谱常用的技术手段有高效液相色谱法、气相色谱法、毛细管电泳法等色谱法,紫外光谱、红外光谱、荧光光谱等光谱法以及生物指纹图谱和非线性化学指纹图谱等,分析方法主要有化学模式识别和其它相似度评价方法。本文主要介绍了指纹图谱常用的技术手段和分析方法,综述了化学指纹图谱、生物指纹图谱和非线性化学指纹图谱等技术手段在食品产地与种类鉴别、掺假鉴别、名优产品的鉴别、批次一致性评价及品种选育等众多领域中的应用,同时对食品指纹图谱在未来的发展进行展望。     

核磁共振技术在食品分析检测中的应用

核磁共振检测技术是一种新型的食品无损检测技术。介绍了核磁共振的基本原理和优势,综述了国内外核磁共振技术在食品中的水分、油脂、玻璃态转变、碳水化合物、蛋白质及品质鉴定等方面的研究进展,但该技术在实际应用中仍然存在一些问题,有待进一步研究。     

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.     

Chlorohydrins of bisphenol A diglycidyl ether (BADGE) and of bisphenol F diglycidyl ether (BFDGE) in canned foods and ready-to-drink coffees from the Japanese market

BADGE.2HCl and BFDGE.2HCl were determined in 28 samples of ready-to-drink canned coffee and 18 samples of canned vegetables (10 corn, 5 tomatoes and 3 others), all from the Japanese market. HPLC was used as the principal analytical method and GCMS for confirmation of relevant LC fractions. BADGE.2HCl was found to be present in one canned coffee and five samples of corn, BFDGE.2HCl in four samples of canned tomatoes and in one canned corn. No sample was found which exceeded the 1mg/kg limit of the EU for the BADGE chlorohydrins. However the highest concentration was found for the sum of BFDGE.2HCl and BFDGE.HCl.H₂O at a level of 1.5mg/kg. A Beilstein test confirmed that all cans containing foods contaminated with BADGE.2HCl or BFDGE.2HCl had at lest one part coated with a PVC organosol.     

European priorities for research to support legislation in the area of food contact materials and articles

A strong science base is required to underpin the planning and decision-making process involved in determining future European community legislation on materials and articles in contact with food. Significant progress has been made in the past 5 years in European funded work in this area, with many developments contributing to a much better understanding of the migration process, and better and simpler approaches to food control. In this paper this progress is reviewed against previously identified work-areas (identified in 1994) and conclusions are reached about future requirements for R&D to support legislation on food contact materials and articles over the next 5 or so years.     

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