气相色谱在食品检测方面的应用及进展

随着我国市场经济的快速发展,人们的物质生活水平不断提升,社会对食品安全的要求也在不断提高。除此之外,随着现今社会科学技术的不断发展,加工食品中的各种添加剂以及农药残留问题日趋严峻,其中饲料添加剂使用量越来越大。在食品检测中运用气相色谱技术可以起到加强食品安全监控的作用,文章对气相色谱技术的含义以及使用进行了描述,希望可以帮助相关食品检测人员。     

我国食品安全现状和食品检测的发展方向

<正>随着时代的发展与进步,人民的生活水平不断提高,且科学技术高速发展,食品供应已经基本达到预期,并且食品的供应速度也在不断提高。但面对食品市场的激烈竞争,以及每况愈下的食品安全问题,如何提高食品检测水平,如何通过可靠的检测保证食品安全,已经成为相关部门首要关心的问题。作为一个人口众多的国家,我国需要在解决基本食物的同时,提高食品的质量。人民对食品的要求已经不再是温饱,对于食品安全也有了高要     

试论食品检验检测的质量控制

<正>食品安全关乎人民的生命健康,是国家稳定、人民安心生活的保障,但是随着我国经济水平以及科学技术的不断发展,食品的种类不断增加,各种食品添加剂也相继涌现。在这样的前提下,很多非法商家为了自己的利益,在食品添加有害食品添加剂,甚至直接售卖假冒伪劣产品,给人们的身体健康带来了安全隐患,所以做好食品检验检测的质量控制至关重要,本文就针对如何提高食品检验检测的质量进行分析,分析了一些其中存在的问题并提出了相应的解决方案,希望能对提高食品安全质量有所帮助。     

我国方便食品的现状与发展趋势

在人民生活水平不断提高、生活节奏日益加快的今天,方便食品越来越为盛行。但是,在方便食品的界定和分类方面,消费者、生产商和研究人员尚未形成充分共识,对我国方便食品产业的现状以及与国外的差异(或差距)也缺乏较深入的对比和思考。针对国内外方便食品产业的发展状况及差异,如何充分发挥食品科学技术在方便食品产业中的作用,成为当前极为迫切的问题。本文在探讨以上问题的基础上,提出我国方便食品发展的重点领域,供食品与相关同行参考。     

基于国际经验完善我国食品声称管理的建议

随着经济社会的快速发展以及科学技术水平的不断提升,广大人民群众的生活日益改善,对营养健康的需求不断增强。现阶段,我国主要通过食品标签向消费者提供食品营养信息和特性,然而由于食品声称相关管理制度尚待完善,不规范声称的现象时有发生,严重影响了群众对我国食品安全的满意度和信任感。本文系统梳理了国际食品法典委员会和部分国家、地区关于食品声称管理的具体要求,并与我国食品声称现行管理制度进行比较分析。在此基础上结合我国国情,提出对我国食品声称管理的建议。     

快速检测片技术在食品微生物检测中的应用分析

随着我国社会主义市场经济的不断发展和完善,人们对生活品质的要求也在不断提升。食品安全是关系到人们健康生活的重要事情,加强对食品安全的检测是保证食品安全,促进人们生活水平提高的基础和保障。当前在科学技术的推动下,食品微生物检测技术也在不断地进步和发展。本文就以快速检测片技术为主要研究对象,对其发展过程以及自身优势进行分析,并对其在食品微生物检测中的应用进行研究,其目的是促进我国食品安全事业的不断发展。     

食品创新技术带来更健康的解决方案

随着科学技术的进步、经济的发展和生活水平的不断提高．人们对食品的组成、营养价值和感官的要求也越来越高。食品工业已不再是传统农业食品的概念．工业食品将在人们的日常生活中占据重要的地位。在这一进程中．食品创新技术已显露锋芒。尤其是近几年来,依靠当代较高水平的科学技术背景和社会的需求．不断致力干推动、促进工业食品技术从传统转化为创新技术,创新技术为食品工业的进步注入了新的活力。     

我国食品检测行业质量管理的现状及其展望

当前随着我国社会经济以及科学技术的发展,食品安全检测领域对其质量管理有了更高的要求。并且在近年来食品安全问题频发的背景下,提高食品检测水平成为了社会关注的热点之一。因此本文通过研究现阶段我国食品检测行业质量管理现状,提出食品检测行业质量管理发展建议及展望,以期为食品检测行业良好发展提供参考和借鉴。     

发展具有中国特色的现代食品工业奔向21世纪

在社会主义物质文明和精神文明水平不断提高,社会主义市场经济迅速发展和即将“入关”的新形势下,本世纪末和21世纪的中国食品怎样走出一条具有中国特色的发展道路?1992年11月18～21日,中国食品科学技术学会在北京举办“21世纪中国食品研讨会”,对我国食品的现状和今后发     

食品供应链中的安全问题

近几年来,随着我国食品行业基础水平的提高以及食品行业出现的质量安全问题,食品供应链安全性的研究越来越受到重视。在满足人们对于食品消费品不断变换的需求同时,食品供应过程中也出现了许多问题。本文分析了我国食品供应链中存在的与食品安全的相关问题,并且提出了通过对原料环节、生产环节、运输流通环节、储藏环节以及最终销售环节的监管,以期让消费者享受到放心安全的食品,提高我国食品质量安全。     

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