加强质量监督工作 提高食品检测实验室工作效率

正在食品检测工作中,食品检测实验室起到的作用至关重要,其操作的规范性、人员的素质等均会影响到检测结果的准确性,因此加强对食品检测实验室的质量监督工作十分必要。一、食品检测实验室质量监督存在的问题监督工作人员的能力不足。由于我国涉及     

食品检测实验室的质量监督策略探析

<正>质量监督在食品检测实验室中具有重要的意义,也是重要环节,是提升实验室人员能力的有效手段,质量监督能够有效确保检测结果的准确性以及客观性。质量监督是为了确保产品满足一定的质量要求而对食品进行监视和验证,从而记录产品风险。近年来随着我国食品产业的快速发展,食品质量监督也在不断进步。但我国的食品质量监督机制不够健全,从而使我国食品的质量存在一定的问题。在我国食品产业方面,经常能听     

食品检测实验室的质量监督

<正>质量监督作为食品检验实验室中的重点管理流程,对食品检测实验室工作人员的工作能力要求较高。加强质量监督,可以有效保证食品检测质量,确保检测结果的客观性与准确性。否则,在食品检测过程中,一旦缺少完善的质量监督模式与制度,例如监督人员的综合能力较差、监督记录情况不实、监督评价不正确等,将严重影响食品检验实验室的质量监督效果。     

食品实验室质量控制

在食品检测实验室质量控制中,构建完善的控制制度,实行全过程质量管理,是全面提高食品检测质量的关键所在。本文立足于食品检测实验室质量控制管理的重要性,分析了质量控制管理中存在的问题,并在此基础上,从完善质量管控制度、实行全过程质量控制、提高检测人员综合素质等方面,论述了强化食品检测实验室质量控制及管理的措施。     

探析食品检测实验室质量控制与管理

进入新时期后,人们日趋重视食品安全问题。食品检测实验室的主要功能是检测食品,然后向社会提供检测结果。而检测数据的准确性会直接受到食品检测实验室人员管理和质量控制的影响,需要结合现阶段存在的问题,采取针对性的控制管理措施。     

食品理化检测实验室的质量管理

食品种类与数量丰富的当今社会,繁荣发展的食品理化检测实验室不仅维护了食品行业的公平竞争,也为广大人民的食品安全保驾护航。因此,全方位地提高食品理化检测实验室的检验能力对食品质量的提升具有至关重要的作用。本研究在长期食品理化检测实验室中工作和学习的基础上,参考《实验室质量控制规范食品理化检测》、《食品检验机构资质认定条件》建立一套科学、有效、可靠、全面的实验室质量管理体系,分析归纳食品理化检测实验室的管理要素,提出有效措施,以期提高实验室检测人员的检测能力,从而全面提高实验室管理能力,减少风险。     

食品检测实验室质量管控策略

正食品检测实验室的主要工作是对食品质量进行检测,再将检测结果提供给社会相关部门参考,从而保障群众食用安全,促进食品行业的可持续发展。尽管食品检测实验室的设备更加先进,但仍存在诸如检测人员的专业素质不强、仪器设备的维护与保养不到位、实验室环境水平滞后、过程管理不到位等问题,极大影响到实验室检测质量。抽样及样品管理抽样及样品管理是食品检测实验室过程管理中的非常关键的环节,实     

加强质量监督工作提高食品检测实验室工作效率分析

质量监督是食品检测工作的重要部分,能够在督促实验工作者进行高质量工作的同时提高工作人员的能力,让检测结果更加准确,从而提高了食品检测工作效率。由此可以看出,质量工作的重要性。因此,本文就对加强质量监督工作,提高食品检测实验室工作效率进行分析和研究。     

浅谈系统准确适应度检测食品化学证实方法的实施和优化

随着国民素质的不断提高,食品检测实验室面临着越来越艰巨的任务,食品检测是食品流通领域的重要防线。食品检测实验室的工作直接关系到国民经济、民生和食品安全。它与其它工业试验不同,但在食品检测方面仍存在一些不足。人们越来越重视食品的健康,食品检测有其特殊性有待改进,这与食品安全和人们的健康息息相关。因此,有必要专门实验室开展检测活动,特别是加强食品检测实验室的质量控制方法。     

食品检测实验室质量控制与管理问题研究

近年来,食品安全事故频发,成为社会各界关注的重点问题。食品检测实验室是保障食品安全的重要场所,为全社会提供可靠的检测数据和参考标准。当前食品检测实验室虽然拥有健全的检测设备,但是在人员培训、设备使用、实验室布局及质量管理等方面有诸多问题。本文立足于现实,首先分析食品检测实验室在工作中存在的问题,其次针对质量控制及管理提出有效策略,希望具有一定的借鉴意义和参考价值。     

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.     

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.     

Textural Properties of Cold-set Gels Induced from Heat-denatured Whey Protein Isolates

A 9% whey protein (WP) isolate solution at pH 7.0 was heat-denatured at 80°C for 30 min. Size-exclusion HPLC showed that native WP formed soluble aggregates after heat-treatment. Additions of CaCl2 (10–40 mM), NaCl (50–400 mM) or glucono-delta-lactone (GDL, 0.4–2.0%, w/v) or hydrolysis by a protease from Bacillus licheniformis caused gelation of the denatured solution at 45°C. Textural parameters, hardness, adhesiveness, and cohesiveness of the gels so formed changed markedly with concentration of added salts or pH by added GDL. Maximum gel hardness occurred at 200 mM NaCl or pH 4.7. Increasing CaCl2 concentration continuously increased gel hardness. Generally, GDL-induced gels were harder than salt-induced gels, and much harder than the protease-induced gel.     

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.     

Occurrence of bisphenol-F-diglycidyl ether (BFDGE) in fish canned in oil

The levels of bisphenol-F-diglycidyl ether (BFDGE) were quantified as part of a European survey on the migration of residues of epoxy resins into oil from canned fish. The contents of BFDGE in cans, lids and fish collected from all 15 Member States of the European Union and Switzerland were analysed in 382 samples. Cans and lids were separately extracted with acetonitrile. The extraction from fish was carried out with hexane followed by re-extraction with acetonitrile. The analysis was performed by reverse phase HPL C with fluorescence detection. BFDGE could be detected in 12% of the fish, 24% of the cans and 18% of the lids. Only 3% of the fish contained BFDGE in concentrations considerably above 1mg/kg. In addition to the presented data, a comparison was made with the levels of BADGE (bisphenol-A-diglycidyl ether)analysed in the same products in the context of a previous study.     

Contribution of European research to risk analysis

The European Commission's, Quality of Life Research Programme, Key Action 1—Health, Food & Nutrition is mission-oriented and aims, amongst other things, at providing a healthy, safe and high-quality food supply leading to reinforced consumer confidence in the safety of European food. Its objectives also include the enhancing of the competitiveness of the European food supply. Key Action 1 is currently supporting a number of different types of European collaborative projects in the area of risk analysis. The objectives of these projects range from the development and validation of prevention strategies including the reduction of consumers risks; development and validation of new modelling approaches; harmonization of risk assessment principles, methodologies, and terminology; standardization of methods and systems used for the safety evaluation of transgenic food; providing of tools for the evaluation of human viral contamination of shellfish and quality control; new methodologies for assessing the potential of unintended effects of genetically modified (genetically modified) foods; development of a risk assessment model for Cryptosporidium parvum related to the food and water industries; to the development of a communication platform for genetically modified organism, producers, retailers, regulatory authorities and consumer groups to improve safety assessment procedures, risk management strategies and risk communication; development and validation of new methods for safety testing of transgenic food; evaluation of the safety and efficacy of iron supplementation in pregnant women; evaluation of the potential cancer-preventing activity of pro- and pre-biotic ('synbiotic') combinations in human volunteers. An overview of these projects is presented here.