超高效液相-串联质谱法测定食品中罂粟壳成分

目的 建立超高效液相-串联质谱法测定食品中罂粟壳成分的分析方法。方法 罂粟壳经乙腈提取后, 经PCX固相萃取柱净化, 选择BEH HILIC柱(粒径1.7 μm, 2.1 mm×100 mm), 以含0.1%甲酸的10 mmol/L乙酸铵溶液和甲酸乙腈溶液(0.1%)作为流动相进行梯度洗脱, 在0.3 mL/min流速下, 以多反应监测(multiple reaction monitoring, MRM)扫描模式进行检测, 外标法定量。结果 吗啡、可待因在25~250 μg/kg添加浓度范围内, 回收率为68.30~80.81%。罂粟碱、那可丁、蒂巴因在0.5~2.5 μg/kg添加浓度范围内, 回收率为68.34%~78.91%。本方法罂粟碱、那可丁、蒂巴因、吗啡和可待因定量限分别为0.5、0.5、0.5、25、25 μg/kg。结论 该方法简便、快速、可靠, 可用于各种食品中罂粟壳生物碱的快速筛查与确证。     

液相色谱-串联质谱法检测火锅底料中罂粟壳

研究建立火锅底料中非法添加罂粟壳的液相色谱-串联质谱测定法。采用水提取,乙腈和无水醋酸钠萃取罂粟壳中的生物碱分,液质联用进行检测,采用色谱柱SHISEIDO CAPCELL PAK CR1∶4(5μm,2.0×150 mm)色谱分离,流动相为乙酸铵:乙腈(50∶50),0.5%甲酸为A相,乙腈为流动相B相。该方法的检出限为1 ng/mL,方法定量下限吗啡为37μg/kg,可待因、罂粟碱、蒂巴因和那可丁为1μg/kg,线性范围为1 ng/m～40 ng/mL,加标回收率64.2%～101.1%。该方法测定火锅底料罂粟碱中吗啡、可待因、罂粟碱、那可丁、蒂巴因5种生物碱的含量快速、准确,适合于火锅调味料食品中罂粟壳的检测。     

亲水作用液相色谱-串联质谱法快速测定食品中罂粟壳的生物碱残留

目的建立亲水作用液相色谱-串联质谱法快速测定食品中的罂粟壳残留生物碱的分析方法。方法样品中的罂粟壳成分采用优化后的Qu ECh ERS方法进行提取,BEH HILIC色谱柱分离(2.1 mm×100 mm,1.7μm),最后采用串联质谱仪对吗啡、可待因、罂粟碱、那可丁及蒂巴因进行检测。结果吗啡、可待因在2.0~100ng/mL范围内线性关系良好,罂粟碱、那可丁、蒂巴因在0.10~5.0 ng/mL范围内线性关系良好。平均加标回收率(n=6)在70%~120%之间,相对标准偏差小于12%。吗啡、可待因、粟碱、那可丁、蒂巴因的检出限分别为10、10、3.8、3.8、7.5μg/kg。结论该方法简便、快速、灵敏,可用于食品中残留罂粟壳成分的检测。     

熟肉制品中罂粟壳成分的液相色谱-串联质谱检测方法研究

采用液相色谱-串联质谱法定量检测分析掺罂粟壳的熟肉制品中罂粟碱和那可丁生物碱成分的残留。文中对熟肉制品中罂粟碱、那可丁的提取、净化预处理及液质联用分析方法进行了优化研究,建立了定量检测熟肉制品中罂粟碱和那可丁的有效方法。罂粟碱、那可丁的母粒子质荷比分别为340.0、414.4,定量用子离子分别为202.0、220.1,定性用子离子分别为324.1/171.0、353.1/179.0。研究结果表明罂粟碱、那可丁在1.0ng/m L~40.0ng/m L范围内线性关系良好,标准曲线相关系数均大于0.999。最低检出限(LOD)均为1.0μg/kg,加标回收率在70%~110%之间,相对标准偏差在0.25%~3.29%之间。本方法具有操作简单、灵敏度高、定量准确等优点,适用于熟肉制品中罂粟壳生物碱成分的检测,可为熟肉制品中罂粟壳类违禁添加物的安全监控提供技术保障。     

QuEChERS/UPLC-MS测定火锅调料中罂粟壳(粉)的研究

目的建立检测火锅调料中非法添加罂粟壳(粉)的方法。方法样品经QuEChERS方法提取、净化后,采用超高效液相色谱串联三重四极杆质谱仪(UPLC-MS),在多反应监测(MRM)模式下,通过色谱、质谱条件优化及方法学考察,建立了高效、准确检测火锅调料中非法添加罂粟壳(粉)的方法。结果本方法的线性范围为:那可丁2.470~49.405ng/mL,r=0.9994;罂粟碱2.090~41.804 ng/mL,r=0.9995;蒂巴因2.042~40.840 ng/mL,r=1.000;可待因11.287~225.733ng/mL,r=0.9996;吗啡10.420~208.400 ng/mL,r=0.9999。那可丁、罂粟碱、蒂巴因、可待因、吗啡的检测限分别为0.21,0.33,0.31,10.37,4.11μg/kg。回收率78.4%~100.6%。结论本方法快速、准确、灵敏度高,可用于检测火锅调料中的罂粟壳(粉)。     

QuEChERS-高效液相色谱-串联质谱法测定火锅调料中罂粟壳

目的 建立了用QuEChERS/高效液相色谱-串联质谱法测定火锅调料中的吗啡、可待因、罂粟碱、蒂巴因、那可丁五种生物碱含量的方法。方法 样品通过QuEChERS法处理后,样品液采用C18色谱分离柱,以10 mmol/L甲酸铵溶液(含0.1%甲酸)-乙腈(含0.1%甲酸)作为流动相进行梯度洗脱,电喷雾正离子模式下多反应监测(MRM)模式检测。结果 样品平均回收率为84.5%～100.5%,RSD为0.8%～3.1%。吗啡、可待因的线性范围为5.0 ng/ml～250.0 ng/ml,相关系数为0.9990～0.9994,最低检出限为2.0 ng/ml,罂粟碱、那可丁、蒂巴因的线性范围为1.0 ng/ml～50.0 ng/ml,相关系数为0.9998～0.9999,最低检出限为0.1 ng/ml。结论 该方法快速、简单、安全、有效、灵敏、准确,适用于火锅调料中罂粟壳的检测。     

超高效液相色谱-串联质谱法检测汤料食品中罂粟壳成分

目的建立超高效液相色谱-串联质谱法(ultra performance liquid chromatography tandem mass spectrometry, UPLC-MS/MS)定性定量检测市售麻辣烫、火锅底料及牛肉汤等汤料食品中罂粟碱、吗啡、可待因、那可丁和蒂巴因的分析方法。方法样品经0.1 mol/L HCl提取、混合阳离子(mixed-cation, MCX)固相萃取柱净化。选用Waters BEH HILIC(2.1 mm×100 mm, 1.7μm)色谱柱进行分离,以0.1%(V/V)甲酸-乙腈和0.1%甲酸-10mmol/L甲酸铵溶液为流动相,进行梯度洗脱。采用正离子源模式(positive electrospray ionization, ESI+)和多反应检测(multi reaction monitor, MRM)模式进行检测,内标法定量。结果在0.1～20μg/L(吗啡和可待因)以及0.1～4.0μg/L(蒂巴因、那可丁和罂粟碱)的浓度范围内, 5种罂粟壳物质线性良好,相关系数均大于0.995,检出限为0.1～0.5μg/L,方法回收率的范围在77.9%～95.5%之间,相对标准偏差1.75%～9.49%(n=6)。结论方法简单易行可操作,且精密度及准确度均较高,适用于汤料食品中罂粟壳的检测。     

QuEChERS-高效液相色谱-串联质谱法测定火锅底料中5种罂粟壳生物碱

目的建立QuEChERS-高效液相色谱-串联质谱法测定火锅底料中5种罂粟壳生物碱的分析方法。方法火锅底料用QuEChERS方法去除杂质,选择Agilent Eclipse Plus C18色谱柱(100 mm×4.6 mm,3.5μm),以0.01 mol/L乙酸铵溶液(含0.1%甲酸)和乙腈作为流动相进行梯度洗脱,在0.4 m L/min流速下,以多反应监测(multiple reaction monitoring,MRM)扫描模式进行检测,外标法定量。结果吗啡、可待因、蒂巴因、罂粟碱、那可丁5种罂粟壳生物碱在火锅底料中的回收率范围为50.3%~105.4%,精密度范围为1.79%~7.91%,方法检出限分别为1.25、1.25、0.25、0.25、0.25μg/kg。结论该方法简便、快速、可靠,可用于火锅底料等食品中罂粟壳生物碱的快速筛查与确证。     

液相色谱-质谱法测定火锅汤料中的罂粟碱

采用高效液相色谱-三重四极杆串联质谱,多反应检测模式定量,建立火锅汤料中5 种罂粟碱残留的分析方法,优化了样品的前处理过程、色谱条件、质谱参数等条件。吗啡、可待因、蒂巴因、罂粟碱、那可丁的检出限分别为2.4、2.4、1.2、0.048、0.024 ng/mL,定量限分别为8.0、8.0、4.0、0.16、0.08 ng/mL,加标回收率介于81.3%～103.5%,相对标准偏差介于3.02%～4.55%。本方法具有操作简单、准确、灵敏度高等优点,可对火锅汤料中是否添加了罂粟壳进行快速检测分析。     

高效液相色谱-串联质谱法测定药酒中5种罂粟壳生物碱

目的 建立高效液相色谱-串联质谱法测定药酒中非法添加吗啡、可待因、蒂巴因、罂粟碱和那可丁５种罂粟壳生物碱的分析方法。方法 药酒在60 ℃水浴锅上挥去乙醇, 再加入含0.2%(V/V)甲酸的乙腈溶液提取, 最后用分散固相萃取(dispersive solid phase extraction, d-SPE)纯化管净化待测。以乙腈和10 mmol/L乙酸铵溶液（含0.1%甲酸）作为流动相进行梯度洗脱, 选用色谱柱为Xtimate TM C18柱, 在0.4 mL/min流速下, 质谱采用电喷雾电离源正离子扫描, 多反应监测模式检测。结果 吗啡和可待因线性范围为5.0~250.0 ng/mL, 蒂巴因、罂粟碱、那可丁的线性范围为1.0~50.0 ng/mL, 相关系数均在0.997以上。5种生物碱的方法检出限和定量限分别为0.02～0.80 μg/L 和 0.07～3.00 μg/L, 回收率范围为80.3%～101.5%, 相对标准偏差(relative standard deviation, RSD)在3.2%～8.1%之间(n=6)。结论 该方法简便、快速、准确可靠, 可用于药酒中罂粟壳生物碱含量的检测。     

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