基于UPLC-Q/Orbitrap HRMS多目标快速筛查鱼肉中30种蛋白同化激素及糖皮质激素

建立基于超高效液相色谱-四极杆/静电场轨道阱高分辨质谱联用技术快速筛查和确证鱼肉中30种蛋白同化激素及糖皮质激素的分析方法.鱼肉样品用80％乙腈溶液(含0.2％甲酸)提取,离心,Oasis PRiME HLB固相萃取柱净化,氮吹后复溶.采用Waters Acquity BEH C18色谱柱(2.1 mm×100mm,1...     

超高效液相色谱-串联质谱法测定动物源性食品中12种青霉素类药物残留量

应用PRiME HLB净化技术,采用超高效液相色谱-串联四级杆质谱(ultra performance liquid chromatography-tandem mass spectrometry,UPLC-MS/MS)分析手段,建立动物源性食品中12种青霉素族抗生素类药物残留量的检测方法。该文着重对样品的净化、浓缩、液相分离及串联质谱等相关检测参数进行了最佳化研究。样品经80%乙腈水混合溶液提取,PRiME HLB固相萃取柱净化,经CORTECS C_(18)色谱柱(100 mm×2.1 mm,2.7μm),以甲醇和0.1%甲酸水溶液为流动相梯度洗脱,以MRM方式进行定量分析。结果表明,各组分在各自浓度范围内线性关系良好,相关系数r~2≥0.998,平均回收率在81.7%~111.9%,相对标准偏差在0.89%~8.56%。该方法用于食品中青霉素族抗生素药物残留检测,具有准确、快速、简便、灵敏度高等优点,可满足我国对青霉素族抗生素类药物检测限要求。     

液相色谱—串联三重四极杆复合线性离子阱质谱法测定水生蔬菜中45种抗生素

目的:建立超高效液相色谱—三重四极杆复合线性离子阱质谱法同时测定水生蔬菜中多种抗生素类化合物。方法:样品以含0.1%甲酸的乙腈溶液为溶剂,加入N-丙基乙二胺(PSA)、无水Na₂SO₄和C₁₈净化处理,质谱采用分时段多反应检测—信息关联—增强子离子(SMRM-IDA-EPI)扫描模式及谱库检索技术,通过对化合物保留时间、离子对及EPI谱库检索对比,外标法定量。结果:45种抗生素在1.0~100.0 μg/L质量浓度范围内线性关系良好(R²＞0.99),检出限为0.3~1.0 μg/kg,定量限为1.0~3.0 μg/kg,在3个浓度添加水平下,45种抗生素的回收率为60.4%~121.7%,相对标准偏差为0.9%~10.2%。结论:该方法快速简便、定性能力强,适用于水生蔬菜中45种抗生素类化合物的筛查确证和定量检测。     

蜂胶胶囊中多种硝基咪唑类药物残留的检测

本文建立了采用液相色谱-串联质谱法测定蜂胶胶囊(以蜂胶为主要原料的保健食品)中多种硝基咪唑类药物(甲硝唑、洛硝哒唑、异丙硝唑、二甲硝基咪唑、羟基甲硝唑、羟甲基甲硝咪唑)残留的检测方法。样品经0.1 mol/L盐酸溶液溶解分散,涡旋混匀,超声提取目标成分,通过HLB SPE小柱净化;采用Waters ACQUITY UPLC?BEH C18(1.7μm,2.1 m×100 mm)色谱柱进行分离,流动相为0.1%甲酸水溶液-乙腈,梯度洗脱,经三重四级杆串联质谱测定,电喷雾正离子MRM模式检测,离子丰度比定性,外标法定量。结果6种目标分析物线性关系良好,相关系数均大于0.998;在2.5、5.0、10.0μg/kg三个水平下,回收率为68.12%～92.20%,RSD为1.20%～5.83%;该方法简单可靠,重复性好,推广应用前景较好,能适用于蜂胶保健食品中多种痕量硝基咪唑类药物的同时检测。     

液相色谱—串联质谱测定水产品中15种苯二氮卓类镇静剂的药物残留

目的:建立一种同时测定水产品中15种苯二氮卓类镇静剂类药物残留的液相色谱—串联质谱(HPLC-MS/MS)分析方法。方法:样品采用乙腈提取,上清液经固相萃取柱(Oasis PRIME HLB柱)净化,浓缩后乙腈定容。以1%甲酸水溶液—乙腈为流动相,在多反应监测(MRM)模式下测定,以内标法定量。结果:在1~100 ng/mL的质量浓度范围内15种苯二氮卓类镇静剂线性关系良好,相关系数均大于0.99,方法的检出限(LOD)为0.1~0.3 μg/kg,定量限(LOQ)为0.3~1.0 μg/kg。在3个不同浓度加标水平下的平均回收率为78%~125%,相对标准偏差为1.52%~12.02%。结论:该方法前处理简单,净化效果好,灵敏度高,适用于水产品中15种镇静剂类药物分析的快速检测。     

文献导读

<正>高效液相色谱-四极杆/离子阱质谱确证测定面粉及面制品中氨基脲采用高效液相色谱-四极杆/离子阱质谱(HPLC-QTRAP-MS)建立了面粉及面制品中氨基脲的确证及测定方法。样品采用盐酸(HCl)提取,在超声辅助下与衍生剂邻硝基苯甲醛反应。衍生产物在中性条件下经PLS固相萃取柱净化、乙酸乙酯洗脱,经Shim-Pack XR-ODSⅢC18柱(2.0 mm×50 mm,     

超高效液相色谱-四极杆/静电场轨道阱质谱快速筛查和定量检测食用油脂中的天然辣椒素、合成辣椒素和二氢辣椒素

建立超高效液相色谱-四极杆/静电场轨道阱质谱(UHPLC-Q/Orbitrap)快速筛查和定量检测食用油脂中天然辣椒素、合成辣椒素和二氢辣椒素的分析方法。结果表明,前处理最佳条件为:样品经二氯甲烷溶解,氢氧化钠水溶液提取,硫酸酸化,PRiME HLB固相萃取小柱净化;液质最佳条件为:0.1%甲酸水-0.1%甲酸乙腈梯度洗脱,Thermo Scientific Accucore Vanquish C₁₈+色谱柱(100 mm×2.1 mm,1.5 μm)分离,静电场轨道阱质谱分析检测。结果表明:3种辣椒素在0.1~40 μg/L范围内线性关系良好,R2≥0.999;3个加标水平(n=6)的平均回收率在66.7%~112.8%范围内,相对标准偏差在3.2%~9.7%范围内;检出限在0.02~0.05 μg/kg之间,定量限在0.1~0.2 μg/kg之间。该方法可在无标准物质的情况下对食用油脂中3种辣椒素进行快速筛查及确证,同时可在有标准物质下进行准确定量,为食用油脂中非法添加回收油脂的筛查确证和准确定量检测提供新的技术和思路。     

双重净化法结合液质联用法快速测定鸡蛋中的磺胺类药物残留

目的 通过双重净化建立鸡蛋中磺胺类药物残留的液相色谱-质谱检测方法。方法 样品经乙腈提取,通过式吸附净化和阳离子交换净化,液相色谱分离,四极杆-静电场轨道阱质谱定性定量测定,平行反应监测模式检测,内标法定量。结果 磺胺类药物保留时间分布在3~7 min,在0.5~20 μg.kg_^-1范围内呈现良好的线性关系,日内、日间精密度均小于20 %,回收率稳定在85~115 %之间,定量限为0.5 μg.kg_^-1。结论 此方法快速、准确且灵敏度高,为监测磺胺类药物在鸡蛋中的残留监控提供了快速准确的技术手段。     

PRiME HLB固相萃取-高效液相色谱-串联质谱法同时快速测定鸡蛋中48种兽药残留

建立固相萃取-高效液相色谱-串联质谱同时快速测定鸡蛋中48种兽药残留的分析方法。样品采用90%乙腈水溶液提取,用PRiME HLB小柱净化浓缩后用电喷雾离子源,正负离子扫描,多反应监测模式的高效液相色谱-串联质谱法进行检测,以基质匹配曲线外标法定量。正离子采用CAPCELL PAK C18 MGⅢ-H色谱柱,流动相为0.05%甲酸乙腈和0.1%甲酸水;负离子采用ACQUITY UPLC BEH C18色谱柱,流动相为5 mmol/L乙酸铵和乙腈。结果表明,鸡蛋样品中的48种兽药残留在0.5~50 μg/kg浓度范围内线性关系良好,相关系数(r)为0.9952~1.0000。方法检出限为0.01~0.55 μg/kg,定量限为0.03~1.83 μg/kg,样品回收率在63.3%~111.4%之间,相对标准偏差小于10%(n=3)。本方法操作快速简单,重复性好,灵敏度较高,适用于鸡蛋中48种兽药残留的快速筛查检测。     

通过式固相萃取-超高效液相色谱串联质谱法快速测定中兽药制剂中４种硝基咪唑类药物

目的建立通过式固相萃取-超高效液相色谱串联质谱法(ultra performance liquid chromatographytandem mass spectrometry,UPLC-MS/MS)同时快速测定中兽药制剂中4种硝基咪唑类药物的方法。方法样品(2.0 g)经乙醇超声提取,采用PRiME HLB固相萃取柱净化,以0.1%甲酸溶液和乙腈为流动相,ACQUITY BEH C18色谱柱分离,电喷雾正离子扫描,多反应监测模式进行液相色谱串联质谱检测。结果 4种目标化合物在1～100 ng/mL范围内线性良好,相关系数r~20.999。在3个加标水平(25、50和250μg/kg)下,4种化合物的平均回收率范围为70.0%～93.8%,相对标准偏差范围为1.2%～13.0%。方法的检出限为10μg/kg;定量限为25μg/kg。结论该方法操作简便、灵敏度高,可满足中兽药制剂中硝基咪唑类药物的监测需求。     

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.     

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.     

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.     

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.     

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.     

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.     

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