浅析面粉增白剂的使用

针对面粉中过氧化苯甲酰含量超标现象,本文阐述了稀释过氧化苯甲酰的生产方法以及其作为面粉增白剂的增白机理,对影响稀释过氧化苯甲酰增白效果的原因和面粉中过氧化苯甲酰超标的原因进行初步的分析,并提出了正确使用面粉增白剂的方法,为企业正确使用面粉增白剂提供依据和参考.     

面粉中添加过氧化苯甲酰的风险评估

过氧化苯甲酰是我国上世纪八十年代末从国外引进并开始在小麦面粉中普遍使用的食品添加剂,目前过氧化苯甲酰作为增白剂在面粉生产中仍广泛应用。文章从危害识别、危害描述、暴露评估、风险描述等方面对过氧化苯甲酰进行了风险评估,并根据我国目前过氧化苯甲酰的使用状况和管理情况,提出了风险管理的建议。     

面粉增白剂使用问题探讨

针对当前面粉中过氧化苯甲酰含量超标现象，阐述了稀释过氧化苯甲酰生产方法以及其作为面粉增白剂的作用机理，对影响稀释过氧化苯甲酰增白效果的原因和面粉中过氧化苯甲酰超标的原因进行初步的分析，并提出了正确使用面粉增白剂的方法，为企业正确使用面粉增白剂提供依据和参考。     

气相色谱法测定小麦粉中过氧化苯甲酰问题探讨

依据GB/T18415-21901<小麦粉中过氧化苯甲酰的测定方法>检测小麦粉中过氧化苯甲酰的含量,对使用气相色谱法处理标准使用液和样品时应注意的问题进行了探讨,对该方法的使用提供了参考.     

稀释过氧化苯甲酰的检测研究

针对当前面粉中添加剂严重超标的现象，本文分析了面粉中过氧化苯甲酰超标的原因，对影响过氧化苯甲酰检测的因素进行研究，并提出改进过氧化苯甲酰含量测定的方法，新方法简便易行，准确度高，可以为企业生产、使用过氧化苯甲酰提供依据。     

面粉中过氧化苯甲酰及其测定方法研究进展

因过氧化苯甲酰安全性倍受争议,中国政府于2011年全面禁止添加过氧化苯甲酰,但在多种因素影响下,部分小型面粉企业开始重新使用过氧化苯甲酰。文章阐述过氧化苯甲酰的危害,并对近3年来有关面粉中过氧化苯甲酰测定方法的研究成果进行综述,旨在推动科研究工作者深入研究适用于现场快速测定过氧化苯甲酰的方法。     

过氧化苯甲酰在面粉中的作用及其安全性分析

综述了过氧化苯甲酰在面粉加工中的主要作用、增白机理及安全性评价等方面的研究,调查分析了国内外对过氧化苯甲酰的最新使用限量标准,为企业的规范生产和对外贸易提供了参考,并对可以采取的应对措施进行了分析和展望.     

新乡市面粉中过氧化苯甲酰的抽样检测

过氧化苯甲酰(BPO)作为面粉增白剂,过量添加会对人体造成危害。本实验随机抽查了新乡市5个面粉厂的50个样品,利用气相色谱法对过氧化苯甲酰的含量进行了检测,并证明了实验结果的准确可靠性;实验检测样品的不合格率为20%,依此,以95%的置信度推测到整个新乡市市售面粉中过氧化苯甲酰超标率在0~45.48%范围内。通过本实验,了解到了新乡市市售面粉中过氧化苯甲酰的使用情况,有利于今后在面粉生产过程中采取针对性的监督管理措施。     

面粉中过氧化苯甲酰检测方法的研究进展

由于过氧化苯甲酰具有漂白和杀菌作用,已被许多国家作为面粉增白剂,考虑到食入过量过氧化苯甲酰可能对人体造成一定危害,各国都规定了限量使用标准,并且要求越来越严格,因此面粉中过氧化苯甲酰的检测方法也随之不断发展.建立速度快、成本低、准确度高的检测体系将成为今后研究的热点.本文对目前常用的一些测定方法进行了综述,并初步进行了分类统计,供从事相关工作的科研工作者参考.     

国内小麦粉中过氧化苯甲酰检测方法研究进展

随着我国禁止在小麦粉制品添加过氧化苯甲酰规定的实施,过氧化苯甲酰的检测方法成为了热点研究方向.对过氧化苯甲酰的分析方法及其优缺点进行了综述,重点阐述了气相色谱法、液相色谱法、光谱法、化学发光法、离子色谱法、示波极谱法、分子印迹及生物传感器法等方法,同时还对便携、快速法检测过氧化苯甲酰的方法进行了探讨,在此基础上对过氧化苯甲酰的分析方法进行了总结.     

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