液相色谱-串联质谱法测定猪肉中13种磺胺类药物残留

利用液相色谱-电喷雾串联质谱建立猪肉中13种磺胺类药物残留的同时、快速分析方法.猪肉样品中的残留药物用1%乙酸-乙腈均质提取,浓缩后用0.1%甲酸-乙腈定容,并用正己烷液-液分配除脂后,用Kinetex C18色谱柱(100mm×2.1mm,2.6μm)分离,以0.1%甲酸-乙腈作为流动相梯度洗脱,采用电喷雾正离子电离,多反应监测模式检测,基质匹配外标法定量.13种磺胺类药物在1~300μg/kg范围内线性关系良好,定量限均小于10μg/kg.在1、2μg/kg和10μg/kg这3个添加水平下,回收率在60.0%~78.1%之间,相对标准偏差(RSD)在0.24%~8.88%之间.此方法操作简便,灵敏度、准确度、精密度均满足残留分析的要求.     

超高效液相色谱-串联质谱法测定畜禽肉中17种磺胺类药物残留

目的建立超高效液相色谱-串联质谱(ultra performance liquid chromatography-tandem mass spectrometry,UPLC-MS/MS)测定畜禽肉组织中17种磺胺类药物残留的方法。方法样品经乙腈提取、浓缩,正己烷脱脂后在正离子模式下以电喷雾电离串联质谱进行测定,外标法定量。结果 17种磺胺类药物在5μg/L~100μg/L范围内线性良好,相关系数0.99,方法检出限为2μg/kg,定量限为5μg/kg。在10、20、100μg/kg的添加水平下,17种磺胺类药物的平均回收率在84.0%~114.2%之间,相对标准偏差(relative standard deviation,RSD,n=6)在0.59%~7.96%之间。结论本方法快速、准确、灵敏,可应用于畜禽肉中17种磺胺类药物残留的同时检测。     

高效液相色谱-四极杆-飞行时间质谱法检测猪肉中22种磺胺类兽药残留

目的建立猪肉中22种磺胺类兽药残留的定性定量分析方法。方法采用固相萃取技术处理样品,通过高效液相色谱-四极杆-飞行时间质谱法对猪肉中的22种磺胺类药物进行分离和检测,并对其进行方法学验证,考察方法检测限、精密度、回收率等指标。建立磺胺类药物的精确相对分子质量数据库,并通过碎片离子的精确质量数推测碎片结构。结果在最低定量限到150μg/kg范围内,标准曲线相关性良好(r≥0.99),所测定的22种化合物检测限为0.1~5μg/kg,化合物回收率在81.1%~118.0%之间,精密度在1.9%~13.6%(n=5)之间。建立了磺胺类共22种化合物的精确相对分子质量数据库。结论建立的方法准确、快速、灵敏度高,结合精确相对分子质量数据库,可应用于实际案例中磺胺类兽药残留的快速分析。     

UPLC-MS/MS法检测运动营养品中磺胺类药物的残留

建立一种超高效液相色谱-串联质谱法检测动物源性运动营养品中9种磺胺类药物残留的分析方法。样品前处理用乙醇沉淀蛋白后,采用HLB小柱进行净化和富集。采用Waters Atalantis T3色谱柱(2.1 mm×150 mm,3μm)分离,以0.1%甲酸-乙腈为流动相的梯度洗脱模式下,9种磺胺类药物在1.0~20.0 ng/m L浓度范围内线性良好,相关系数R2为0.994~0.999,检出限均为4.0μg/kg,定量限均为13.0μg/kg。当分别添加10,50和100μg/kg等3个浓度的标准混合溶液时,加标回收率达到80.6%~92.2%。该方法具有前处理简单、净化效果好、灵敏度高和检测速度快的优点,适用于动物源性运动营养品中磺胺类药物残留的分析和定量检测。     

液相色谱-串联质谱法检测蜂蜜中15种喹诺酮类和17种磺胺类药物残留

目的建立同时测定蜂蜜中15种喹诺酮和17种磺胺类药物残留的液相色谱-串联质谱(liquid chromatography-tandem mass spectrometry,HPLC-MS/MS)检测方法。方法样品经过磷酸盐缓冲溶液(pH=8)提取,过HLB(hydrophile-lipophile balance)固相萃取柱净化。以CORTECS C18色谱柱(2.1 mm×100 mm,1.6μm)分离,以5 mmol乙酸铵、0.1%甲酸水(A)和0.1%甲酸-乙腈(B)作为流动相进行梯度洗脱。质谱分析以电喷雾为离子源(electrospray ionization,ESI+),采用多反应监测(multiple reaction monitoring,MRM)。结果本方法在15 min内完成32种目标化合物的分离。15种喹诺酮和17种磺胺类药物在1.0、5.0和10.0μg/kg添加水平的回收率为54.9%~122.5%,相对标准偏差(relative standard deviation,RSD)小于18.7%(n=6),方法检出限为0.4μg/kg,定量限为1.0μg/kg。结论该方法快速、准确、灵敏,适合测定蜂蜜中喹诺酮和磺胺类药物残留。     

液相色谱-串联质谱法同时测定保健食品中四种违禁药物含量

目的建立超高效液相色谱-串联质谱法测定保健食品中西地那非、他达那非、伐地那非以及红地那非四种违禁药物含量的方法。方法采用ACQUITY UPLC BEH C18(100 mm×2.1 mm,1.7μm)色谱柱,以甲醇和添加0.1%甲酸5 mmol乙酸铵为流动相,梯度洗脱程序,进样分析20 min,在电喷雾正离子模式下以多反应监测(MRM)方式检测,外标法定量。结果四种那非类违禁药物的检出限(LOD,S/N=3)和定量限(LOD,S/N=10)分别0.1~0.5μg/kg和0.3~2.0μg/kg在0.1~100μg/kg浓度范围内线性关系良好(r0.99),加标回收率为73.6%~90.4%,相对标准偏差为1.0%~8.9%。结论该方法操作简单,重现性好,背景噪音低,具有较高的灵敏度和选择性。     

液相色谱-串联质谱法同时测定蜂蜜中17种 磺胺类药物的残留量

目的建立液相色谱-串联质谱法(1iquid chromatography-tandem mass spectrometry,LC-MS/MS)同时测定蜂蜜中的17种磺胺类药物。方法蜂蜜样品经0.1 mol/L盐酸溶液溶解,经正己烷除脂、固相萃取柱净化,采用CAPCELL PAK C_(18)色谱柱分离;质谱采用电喷雾正离子电离模式(electrospray ionization,ESI+)和多反应扫描监测模式(multi reaction monitoring,MRM)进行测定,以内标法定量。结果 17种磺胺类药物的检出限为0.1~1.0μg/kg;在0.5~50μg/kg范围内线性关系良好,相关系数r0.99;回收率在82.40~100.6%之间,相对标准偏差为1.0~6.0%(n=6)。结论本方法灵敏度高、准确性好,可适用于蜂蜜中多种磺胺类药物残留的检测。     

超高效液相色谱-串联质谱法测定鸡肉中9种大环内酯类抗生素

目的建立超高效液相色谱-串联质谱法测定9种大环内酯类抗生素药物的分析方法。方法采用响应面法优化净化方法。样品经1%甲酸-乙腈提取,提取液经50 mg C₁₈、80 mg N-丙基乙二胺(primary secondary amine,PSA)、100 mg MgSO₄净化,Waters ACQUITY UPLC HSS T₃色谱柱(2.1 mm×100 mm,1.8μm)进行分离,采用电喷雾正离子多反应监测扫描(multiple reaction monitoring,MRM)模式下进行测定,外标法定量。结果其中8种抗生素线性范围1~50 ng/mL,替米考星为5~50 ng/mL,相关系数(r²)在0.9910-0.9993之间。替米考星检出限为2.5μg/kg,定量限为10μg/kg,其余8种化合物检出限均为0.5μg/kg,定量限均为2μg/kg。在低(替米考星10μg/kg,其他2μg/kg)、中(替米考星20μg/kg,其他10μg/kg)、高(替米考星40μg/kg,其他20μg/kg)3个添加水平下进行加标回收实验,9种抗生素平均回收率在81.30%~105.30%之间,相对标准偏差在0.77%~2.41%之间(n=6)。结论该方法操作简单、净化效果好、灵敏度、准确度和精密度均符合多残留检测技术要求,解决了大环内酯抗生素检测提取过程过于繁琐的问题,可为食品抗生素残留检测提供更方便、更快捷的检测方法支持。     

离子交换固相萃取-超高效液相色谱-串联质谱法快速测定腐竹中的乌洛托品

目的建立腐竹中乌洛托品的超高效液相色谱-串联质谱(UPLC-MS/MS)测定方法。方法样品经乙腈/水(1:1,v:v)溶液超声提取,阳离子交换柱净化后,经Waters Acquity UPLC BEH HILIC(2.1 mm×100 mm,1.7μm)色谱柱分离,在电喷雾正离子多反应监测模式下进行测定。结果乌洛托品在0.5~100.0μg/L范围内线性关系良好,相关系数(r)大于0.999。方法检出限和定量限分别为6μg/kg和20μg/kg。在20、40、100μg/kg 3个空白加标水平下,乌洛托品的加标回收率为100.1%~103.9%,相对标准偏差为4.7%~8.9%。结论该方法快速、简便、准确可靠,适用于腐竹中非法添加的乌洛托品的含量测定。     

通过型固相萃取净化-超高效液相色谱-串联质谱法检测鸡肉中23种磺胺类药物残留

建立了通过型固相萃取净化超高效液相色谱-串联质谱法同时检测鸡肉中23种磺胺类药物残留的分析方法。鸡肉样品经80%乙腈溶液（含0.2%甲酸）提取,Oasis PRiME HLB固相萃取柱进行净化,用Waters Acquity UPLC CSH C18色谱柱（100 mm×2.1 mm,1.7 μm）分离,以甲醇和0.1%甲酸溶液为流动相梯度洗脱,电喷雾源正离子扫描及依赖保留时间的多反应监测模式下（Scheduled MRM）检测,外标法定量。结果表明:23种磺胺类药物在线性范围0.2~20 ng/mL上有良好的线性关系,相关系数均大于0.9996;检出限为0.1~2.0 μg/kg,定量限为0.25~5.0 μg/kg;在1.0、2.0、5.0 μg/kg三个加标水平上平均回收率为66.12%~99.83%,相对标准偏差（RSD,n=6）为0.72%~10.36%;该方法操作简单、灵敏度高、重现性好,适用于鸡肉中多种磺胺类药物残留的检测。     

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