超高效液相色谱-四极杆串联离子阱复合质谱法同时测定药食同源中药材中6种玉米赤霉醇类真菌毒素

目的 建立超高效液相色谱-四极杆串联离子阱复合质谱法检测药食同源中药材中6种玉米赤霉醇类真菌毒素的方法。方法 样品经乙腈-甲酸-水(80:1:19)提取, MLJ-1多重基质吸附型固相萃取柱净化, C18色谱柱分离, 以乙腈和0.1％甲酸水溶液为流动相进行梯度洗脱, 电喷雾负离子模式电离, 多反应监测-信息关联扫描-增强子离子扫描(MRM-IDA-EPI)扫描模式检测, 外标法定量。结果 6种玉米赤霉醇类真菌毒素在0.1～20 ng/mL范围内均呈现良好的线性关系, 相关系数(r)均大于0.994。检出限为0.3～0.5 μg/kg, 平均加标回收率为83.4%～99.7%, 相对标准偏差为2.7%～7.4%。结论 本方法应用超高效液相色谱-四极杆串联离子阱复合质谱特有的MRM-IDA-EPI扫描模式,可同时实现化合物的准确定性、定量分析及可疑峰筛查、确证。     

高分辨质谱法快速筛查肉制品中28种着色剂

目的:建立超高效液相色谱-四极杆/静电场轨道阱高分辨质谱法快速分析肉制品中28种合成着色剂的方法。方法:样品经乙腈和乙酸乙酯提取、净化后,经色谱柱分离,流动相梯度洗脱。在正、负离子切换模式下测定28种合成着色剂;通过28种合成着色剂的保留时间和一级母离子精确质量数以及同位素丰度比,实现对28种合成着色剂的快速测定;以二级碎片离子精确质量数进行确证。结果:目标物线性关系良好,相关系数大于0.99;方法检出限为2.5～500μg/kg;回收率73.5%～109.2%,相对标准偏差4.9%～10.0%。结论:该方法简单、快速、可靠,适用于肉制品中28种合成着色剂的定性筛查和定量分析。     

超高效液相色谱-串联质谱法检测预包装畜禽肉制品中多种兽药残留

目的 建立预包装畜禽肉制品中54种兽药残留的超高效液相色谱-串联质谱检测方法。方法 样品经甲酸乙腈提取,Oasis PRIME HLB固相萃取柱净化,经Waters Acquity UPLC BEH C18色谱柱分离,以甲醇和0.1％甲酸水溶液为流动相进行梯度洗脱,电喷雾正离子(ESI+)模式电离,MRM-IDA-EPI扫描模式检测。结果 经方法学验证,54种化合物在0.5ng/mL～50 ng/mL范围内均呈现良好的线性关系,相关系数均?0.990,检出限0.5 μg/kg ～10 μg/kg,回收率为76.3%～92.4%,相对标准偏差为3.1%～15.2%。结论 本方法操作简便,回收率高。适用于预包装畜禽肉制品中54种兽药残留的同时定性、定量分析及确证。     

超高效液相色谱-三重四极杆/复合线性离子阱质谱法快速测定动物源性食品中5种硝基咪唑类药物残留

目的 采用通过式净化柱-超高效液相色谱-三重四级杆/复合线性离子阱质谱技术,建立了动物源性食品中5种硝基咪唑类药物残留的快速确证检测方法。方法 样品经1%甲酸-乙腈溶液提取后离心,上清液直接通过PRiME HLB柱净化,然后进入超高效液相色谱-三重四极杆/复合线性离子阱质谱（UPLC-QTRAP MS）进行分析。对净化条件、流动相、色谱柱等进行了优化。确定以PRiME HLB柱净化,Acquity BEH C₁₈柱为分析柱,0.1%甲酸水和乙腈溶液做为流动相,电喷雾正离子模式下多反应监测-触发增强子离子扫描（MRM-IDA-EPI）方式检测,同位素内标法定量。结果 方法的定量限为0.30~0.80 μg/kg。蛋、肉及水产中加标回收率范围为73.2%~115.2%,相对标准偏差为3.2%~9.3%。结论 该方法快速、灵敏、准确,适用于动物源性食品中硝基咪唑类药物残留的检测,可应用于大批量样品的筛查及确证。     

超高效液相色谱-串联四极杆-线性加速离子阱复合质谱法检测加工肉制品中6种合成着色剂

建立了加工肉制品中6种合成着色剂检测的超高效液相色谱-串联质谱分析方法。样品经甲醇-5%氨水(3∶7)混合溶液提取,正己烷除脂,经Oasis WAX固相萃取小柱净化,6种着色剂经Waters Acquity UPLC BEH C18色谱柱分离,以甲醇和0.02 mol/L乙酸铵水溶液为流动相进行梯度洗脱,电喷雾负离子(ESI-)模式电离。结果表明:6种色素在0.05~5.0μg/m L范围内呈良好的线性关系,相关系数(r)均大于0.991;酱牛肉样品中3个浓度添加水平平均回收率为83.5%~96.8%;相对标准偏差为3.84%~9.26%。该方法应用Qtrap特有的MRM-IDA-EPI扫描模式,可实现化合物的进一步确证。     

三通道自动固相萃取-高效液相色谱四极杆串联质谱法检测水中8种痕量微囊藻毒素

目的 建立三通道自动固相萃取-高效液相色谱-四极杆串联质谱法检测水中痕量的8种微囊藻毒素的分析方法.方法 采用高自动化的前处理设备,采用C18固相萃取小柱富集浓缩,应用液相色谱-四极杆串联质谱法定性定量地检测8种微囊藻毒素.结果 该方法检测水中的8种微囊藻毒素检出限为0.01～0.6μg/L,在0.25～62.5μg/...     

QuEChERS结合UPLC-Q/Orbitrap HRMS法测定小麦粉中9种真菌毒素

建立QuEChERS-高效液相色谱-四极杆/静电轨道离子阱高分辨质谱法同时测定小麦粉中9种真菌毒素的方法.样品经2.0％甲酸-乙腈提取,QuEChERS盐包脱水盐析后,用dSPE净化管净化,超高效液相色谱分离,在正离子模式下进行检测.在全扫描模式下测定目标化合物的一级精密质量数,与理论精密质量数相比,相对偏差不大于1....     

超高效液相色谱-四极杆/静电场轨道阱高分辨质谱快速筛查测定几种食品中的8种碱性色素

本文研究了超高效液相色谱-四极杆/静电场轨道阱高分辨质谱法快速测定面包、橙汁、卤豆干等食品中8种碱性色素的方法。样品用乙酸乙酯提取后,以C18(3.0 mm×100 mm,1.8μm)色谱柱分离,乙腈和10 mmol/L乙酸铵水溶液为流动相梯度洗脱,在正负离子切换模式下检测8种碱性色素。在全扫描模式下提取8种碱性色素的保留时间和一级母离子精确质量数以及同位素丰度比,实现对食品中8种碱性色素的快速测定;以自动触发采集的二级碎片离子精确质量数进行确证。8种碱性线性关系较好,相关系数(R2)大于0.99,回收率在82.2%～105.3%之间,相对标准偏差在6.0%～9.9%之间。该方法简单、快速、可靠,可定性筛查和定量分析食品中8种碱性色素。     

超高效液相色谱-四极杆/静电场轨道阱高分辨质谱法测定动源性食品中33种兽药残留及质谱库的建立

目的 建立超高效液相色谱-四极杆/静电场轨道阱高分辨质谱法测定动源性食品中33种兽药残留的检测方法.方法 采用乙腈-水(80:20,V:V)为提取溶剂,QuEChERS方法净化,在Full MS-ddMS2正离子扫描模式下,快速对动源性食品中的目标化合物进行检测.结果 在r=70000,扫描范围80～1000 m/z内...     

基于质谱特征碎裂片段的巴氏杀菌乳中氯化烟碱类药物及其代谢产物非定向筛查方法构建

该研究利用超高效液相色谱-四极杆-静电场轨道离子阱高分辨质谱技术,对12种氯化烟碱类药物及其代谢产物色谱信息、分子离子质荷比和二级碎裂片段的质荷比进行采集,解析了碎裂途径,建立了氯化烟碱类药物及其代谢产物标准数据库,筛选特征碎裂片段;采用数据非依赖扫描模式,获取可追溯的样品质谱信息,构建了乳制品中氯化烟碱类药物及其代谢产物的非定向筛查方法。该方法确定限和检测容量分别为0.01 μg/kg~0.33 μg/kg与0.03 μg/kg~0.59 μg/kg,回收率为84%~104%,其相对标准偏差为4.4%~7.1%。将所建立的方法用于81个批次巴氏杀菌乳中氯化烟碱类药物及其代谢产物的筛查工作当中,发现样品中含有未检出的啶虫脒-代谢物-IM-1-4,含量为0.32 μg/kg。结果显示该方法快速、简便,可实现乳制品中氯化烟碱类药物及其代谢产物准确定性和精准定量。     

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