液相色谱-串联质谱内标法同时测定调味品中11种工业染料

本研究成功建立了QuEChERS净化液相色谱-串联质谱内标法同时测定调味品中11种工业染料（碱性嫩黄O、碱性黄、碱性橙21、碱性橙22、碱性橙2、罗丹明B、罗丹明6G、苏丹红Ⅰ、苏丹红Ⅱ、苏丹红Ⅲ和苏丹红Ⅳ）的分析方法。样品经乙腈提取,采用C18和PSA吸附剂净化后进行液相色谱-串联质谱分析,多反应监测（MRM）模式检测,内标法定量。结果表明,在0.5~100 μg/L范围内,方法呈现良好的线性关系（r>0.9976）,检出限在0.01~0.4 μg/kg之间。当实际样品中添加水平为5~200 μg/kg时,方法平均回收率为70.7%~105.0%,相对标准偏差（RSD）为0.1%~9.3%。应用本方法对50个批次的调味品进行测定,发现其中4个批次样品检出不同浓度的罗丹明B。该方法操作简便,快速准确,可以用于调味品中11种非法添加工业染料残留的测定。     

辣椒制品中的苏丹红检测方法的优化

优化了辣椒及其制品中苏丹红Ⅰ~Ⅳ的检测方法。样品经固相萃取净化后,以乙腈和0.75%的乙酸水为流动相,梯度洗脱,经C18柱分离,于500nm波长下检测。结果表明:苏丹红Ⅰ~Ⅳ在0.08~2.56μg/mL时有良好的线性关系,在添加浓度为0.15~1.28μg/mL时,辣椒粉中苏丹红Ⅰ~Ⅳ回收率为86.2%~97.7%;辣椒油中苏丹红Ⅰ~Ⅳ回收率为87.2%~94.8%;辣椒酱中苏丹红Ⅰ~Ⅳ回收率为82.7%~92.0%。苏丹红Ⅰ~Ⅳ的检出限分别为0.03,0.05,0.03,0.06μg/mL。实验表明:优化后的方法比国标GB/T 19681-2005方法耗时短,灵敏度高,简便,重现性好,适于实验室的日常检测。     

改进分子印迹固相萃取—高效液相色谱法同时 测定辣椒制品中4种苏丹红含量

目的建立分子印迹固相萃取—高效液相色谱法同时测定辣椒制品中4种苏丹红(苏丹红Ⅰ、Ⅱ、Ⅲ和Ⅳ)的含量。方法改进GB/T19681-2005食品中苏丹红染料的检测方法高效液相色谱法中的试样处理方法,使用Welchrom~?SDH分子印迹固相萃取小柱对多种辣椒制品基质进行净化,并采用Ultimate~?XB-C18(250 mm×4.6 mm, 5μm)色谱柱,以乙腈和水为流动相进行等度洗脱,于500 nm波长下测定。结果苏丹红Ⅰ、Ⅱ、Ⅲ和Ⅳ在0.1～10.0μg/mL范围内线性关系良好,相关系数r~2为0.9995～0.9999,回收率为88.9%～106.6%,检出限为0.01 mg/kg。结论该方法简便、灵敏度高、准确性好,适用于食品中4种苏丹红的定量分析。     

超高效液相色谱-质谱联用法(UPLC-MS/MS)测定辣椒制品中苏丹红Ⅰ、Ⅱ、Ⅲ、Ⅳ的含量

建立简便快速的测定辣椒制品中4种苏丹红染料的检测方法,以乙腈为提取溶剂,采用乙腈-0.1%水溶液的流动相体系和正离子电离模式,用UPLC-MS/MS测定4种苏丹红染料;苏丹红Ⅰ、Ⅱ、Ⅲ、Ⅳ线性范围为0～200ng/mL,R2大于0.9911,检出限分别为1.0、2.0、2.0、4.0μg/kg,加标回收率均大于75%,RSD小于10%。该方法简便灵敏,准确快速,可用于辣椒制品中4种苏丹红染料的测定及确证。     

LC-MS/MS法快速筛查辣椒制品中8种禁用苏丹染料

建立辣椒制品中8种禁用苏丹染料(苏丹红Ⅰ、苏丹红Ⅱ、苏丹红Ⅲ、苏丹红Ⅳ、苏丹红7B、苏丹红G、苏丹蓝Ⅱ、苏丹黄)的液相色谱-串联质谱法快速筛查方法。辣椒制品经正己烷萃取,氧化铝柱净化,用乙腈和0.1%甲酸水溶液作为流动相,经C18色谱柱梯度洗脱分离,质谱仪定性定量。结果表明:8种苏丹染料在2.5 ng/mL～500.0 ng/mL质量浓度范围内,呈现良好的线性关系,相关系数r2≥0.999 5;检出限为0.62 ng/mL～6.25 ng/mL,测定下限为2.5 ng/mL～25.0 ng/mL;平均回收率在92.4%～98.6%之间,RSD在1.7%～3.8%之间。液相色谱-串联质谱(liquid chromatographtandem mass spectrometry,LC-MS/MS)法适用于快速筛查复杂基质辣椒制品中8种禁用苏丹染料。     

HPLC法同时检测辣椒制品中8种非食用红色色素

建立了凝胶柱净化-高效液相色谱法同时检测辣椒制品中苏丹红Ⅰ、苏丹红Ⅱ、苏丹红Ⅲ、苏丹红Ⅳ、对位红、苏丹红G、苏丹红7B和苏丹红B等8种红色色素的方法。样品用正己烷或正己烷/丙酮提取,提取液经BioBeadsS-X3凝胶柱净化。净化后的样品采用ZorbaxSBC18柱分离,以0.1%甲酸水溶液(A)和含0.1%甲酸的甲醇丙酮(9∶1,V/V)溶液(B)为流动相,流速1mL/min,检测波长505nm。上述8种色素组分在其质量浓度为0.16～2.56mg/L时有良好的线性关系,方法的检测限为15～46μg/kg;平均加标回收率为89.9%～118.2%,相对标准偏差为2.3%～4.8%。该方法灵敏可靠,适合于辣椒制品中多种脂溶性红色色素的同时检测。     

辣椒粉中非法添加苏丹红色素快速检验分析

目的建立辣椒粉中苏丹红色素快速检验分析方法。方法以苏丹红Ⅰ、苏丹红Ⅱ、苏丹红Ⅲ、苏丹红Ⅳ为对照,以正己烷-乙酸乙酯(7:1,V:V)为展开剂,采用薄层色谱法迚行定性鉴别;以苏丹红Ⅰ、苏丹红Ⅱ、苏丹红Ⅲ、苏丹红Ⅳ为对照,Agilent C_(18)(250 mm×4.6 mm,5μm)为色谱柱,乙睛-0.2磷酸(92:8,V:V)为流动相,流速为1.0 m L/min,检测波长为495 nm,柱温30℃,采用高效液相色谱法迚行检测。结果建立薄层色谱法能很好分离各成分;苏丹红Ⅰ、苏丹红Ⅱ、苏丹红Ⅲ、苏丹红Ⅳ的线性范围分别在16.49~245.59μg(r=0.9999)、16.30~334.88μg(r=0.9997)、16.81~478.02μg(r=0.9999)、16.82~438.21μg(r=0.9996);平均回收率(n=6)分别为97.68%、98.35%、98.32%、98.14%。结论本法简便可行、重复性好,可用于辣椒粉中非法添加苏丹红色素的质量控制和快速检验。     

基质分散固相萃取-超高效液相色谱法检测辣椒制品中苏丹红染料

本文结合基质分散固相萃取和超高效液相色谱技术,建立一种快速、简单的测定辣椒制品苏丹红类染料残留的分析方法。该方法简单、快速、准确,适用于辣椒制品中苏丹红类染料的测定。4种苏丹红在0.05~2.0μg/m L的范围内,浓度与峰面积呈良好的线性关系,检出限为0.01mg/kg,加标回收率在83.7%~101.2%之间,相对标准偏差在1.16%~7.58%之间。     

超高效液相色谱-串联四级杆质谱法测定辣椒制品中的4种苏丹红

本文采用与苏丹红染料作用更强的碱性氧化铝柱为固相萃取小柱,建立了超高效液相色谱-质谱法测定辣椒制品中4种苏丹红的测定方法。分别对提取溶剂、固相萃取小柱淋洗液、洗脱液及液相色谱条件进行了优化。10mL乙腈-二氯甲烷(3:2,V/V)混合溶液作为提取液,依次用10mL正己烷、4mL乙酸乙酯-正己烷(1:1,V/V)混合溶液作为淋洗液,12mL的5%酸化甲醇-乙酸乙酯(1:1,V/V)混合溶液作为洗脱液。采用ACQUITY BEHC18色谱柱(2.1×100mm,1.7μm),以0.3%甲酸乙腈溶液,0.3%甲酸水溶液为流动相,等度洗脱。4种苏丹红基质添加标准曲线在10~500μg/L的浓度范围内有良好的线性关系,线性相关系数均大于0.995。苏丹Ⅰ~Ⅳ的检出限分别为5.0、5.0、4.0、4.0μg/kg。在10~150μg/kg浓度范围做空白样品添加实验,平均回收率在71.4~104.2%之间,相对标准偏差(RSD,n=6)在4.6~8.9%之间。应用本方法测试380份样品,其中阳性样品36份,阳性样品检出组分主要为苏丹Ⅳ。     

固相萃取-在线光化学衍生-荧光检测法同时测定辣椒制品中4种苏丹红染料

建立了固相萃取-在线光化学衍生-荧光检测法同时测定辣椒制品中苏丹红Ⅰ,Ⅱ,Ⅲ,B的方法。用丙酮和乙腈的混合溶液(2∶8)提取样品中4种苏丹红染料,提取液浓缩后经C18固相萃取柱净化,采用高效液相色谱进行分离,在线光化学衍生后进入荧光检测器测定,外标法定量。结果表明:4种苏丹红在0.10~1.0μg/mL范围内线性关系良好,相关系数均大于0.999;低、中、高3个不同加标浓度下,4种苏丹红的回收率均大于85%,相对标准偏差为1.58%~4.36%;方法的检出限(LOD)为0.30~0.45μg/kg,定量限(LOQ)为1.00~1.50μg/kg。该方法具有重现性好、灵敏度高、结果准确的特点,适用于食品中苏丹红残留的分析检测。     

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