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1.
目的建立准确可靠的高效液相色谱法测定食品中苏丹红I~IV的方法。方法用乙腈提取样品中的苏丹红,经漩涡超声离心后,将乙腈层倾倒出,用乙腈重复提取,通过凝胶色谱的净化,用液相色谱进行检测。其中凝胶色谱柱为Bio-BeadsTM S-X3 Beads,液相色谱柱为Waters C18(4.6 mm×150 mm,5μm),液相色谱流动相为乙腈-水(V:V,90:10)。结果 4种苏丹红染料的检出限均能达到10μg/kg,满足国标要求。标准加入量为0.16μg/m L浓度时,辣椒粉的回收率为92.5%~97.5%、辣椒酱的回收率为83.8%~87.5%、香肠的回收率为82.5%~98.8%,相关系数0.9995以上,且重复性良好。结论高效液相色谱法可以测定食品中苏丹红I~IV,适用于批量样品的检测。  相似文献   

2.
高效萃取体系RP-HPLC测定食品中的对位红和苏丹红   总被引:4,自引:1,他引:3  
本文研究使用高效萃取体系,建立反相高效液相色谱(RP-HPLC)同时测定食品中对位红、苏丹红Ⅰ~Ⅳ号及苏丹红7B.样品用甲醇-乙腈-丙酮萃取液提取,采用聚硅烷C1s色谱柱(Shiseido C18 150mm×4.6 mm i.d,5μm)分离以水-乙腈为流动相,流速1.0mL/min,等度洗脱;用紫外-可见光二极管阵...  相似文献   

3.
目的建立一种凝胶渗透色谱-高效液相色谱法(gel permeation chromatography-high performance liquid chromatography,GPC-HPLC)同时测定糟蛋中4种苏丹红(苏丹红Ⅰ、Ⅱ、Ⅲ和Ⅳ)的方法。方法糟蛋样品经环己烷-乙酸乙酯提取,经Bio-Beads S-X3凝胶柱净化;采用Agilent Zorbax SB C_(18)色谱柱对糟蛋中4种苏丹红进行分离,以97%乙腈水溶液为流动相,流速为1.0 m L/min,用配有紫外检测器的液相色谱仪检测,检测波长为478 nm和520 nm。结果 4种苏丹红样品在0.1~25.0 mg/L浓度范围内线性良好(r~20.999),该方法的检测限为6.3~11.9μg/kg,加标回收率为86.0%~101.2%,相对标准偏差(RSD)在1.68%~4.58%之间。结论本方法操作简便、准确可靠,可应用于糟蛋中苏丹红的检测。  相似文献   

4.
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。  相似文献   

5.
液相色谱-质谱法测定辣椒中的苏丹红Ⅰ   总被引:1,自引:0,他引:1  
建立了液相色谱-质谱法测定辣椒中的苏丹红Ⅰ,用乙腈提取样品中的目标物,采用ACQUITY UPLCTM BEH C18柱,以乙腈:水=90:10为流动相,进行液相色谱.质谱检测.其线性范围为0.01μg/mL~10μg/mL:线性回归系数为0.9997;检出限为0.1μg/mL:回收率为87.9%~95.4%.  相似文献   

6.
建立了等梯度反相高效液相色谱法检测食品中苏丹红Ⅰ、Ⅱ、Ⅲ、Ⅳ的方法.样品用乙腈提取,C18作为固定相,乙腈作为流动相,检测器采用紫外可见光检测器.结果:该方法线性范围为0.15μg/mL~7.5μg/mL,相关系数均为0.999 以上(n=7),最低检出限为0.01μg/mL,回收率达到98%~102%.结论:该方法操作简便、快捷、灵敏度高,适用于一般实验室进行食品中苏丹红的检测.  相似文献   

7.
超高效液相色谱-质谱法测定禽蛋中苏丹红   总被引:2,自引:0,他引:2  
建立了一种快速测定禽蛋中苏丹红含量的超高效液相色谱-串联四极杆质谱联用(UPLE-MS/MS)分析方法.样品经乙腈提取后,加水反沉淀除去蛋白质和脂肪等杂质,冷冻后取上层清液,经C18>超高效液相色谱柱分离,串联四极杆质谱多反应监测模式检测.苏丹红Ⅰ、Ⅱ、Ⅲ、Ⅳ方法检出限为5 μg/kg,相关系数是0.9999,在100~300μg/kg范围内,回收率在70.1%~107%之间.  相似文献   

8.
建立了郫县豆瓣中苏丹红Ⅰ~Ⅳ的固相分散萃取(SPDE)-高效液相色谱(HPLC)分析方法。样品用无水硫酸钠作为分散剂,以乙腈提取样品中的苏丹红,提取液用中性氧化铝层析柱进行净化。用Inertsil ODS-sp C18柱(4.6mm×250mm,5μm))分离,流动相A为乙腈,流动相B为0.1%甲酸水溶液(A∶B为90∶10,V/V),等度洗脱,流速1mL/min,柱温40℃。二极管阵列检测器检测,检测波长为517nm,利用保留时间和光谱图定性,外标法定量。4种苏丹红染料在0.10~20.00μg/mL范围内线性关系良好,相关系数均大于0.9999,苏丹红Ⅰ~Ⅳ的检出限(LOD)分别为0.009~0.013mg/kg(信噪比S/N=3)。在添加浓度为0.5~10.0mg/kg范围内平均回收率达81.67%~93.28%,相对标准偏差(RSD)为1.07%~4.61%(n=6)。  相似文献   

9.
目的建立同时测定鸡蛋中7种色素含量的超高效液相色谱串联质谱(ultra performance liquid chromatography-tandem mass spectrometry,UPLC-MS/MS)法。方法鸡蛋样品用乙腈超声提取。经Phenomenex Kinetex F5(100 mm×3.0 mm,2.6μm)色谱柱分离,流动相A:0.1%的甲酸/水溶液;流动相B:0.1%的甲酸/乙腈溶液作为流动相梯度洗脱。电喷雾离子源(electrospray ionization,ESI)正离子多反应监测模式定量分析。结果7种色素在浓度1~20μg/L范围内线性关系良好,相关系数r~2≥0.998。叶黄素、角黄素、苏丹红Ⅰ、苏丹红Ⅱ、苏丹红Ⅲ、苏丹红Ⅳ的检出限均为0.1μg/kg,核黄素的检出限为0.2μg/kg。7种色素在加标量2~10μg/kg范围内,回收率为80.2%~106.7%,相对标准偏差为1.5%~6.0%。结论该方法准确、快速、高效,可用于鸡蛋中色素的定性、定量分析。  相似文献   

10.
目的建立禽蛋中苏丹红Ⅰ、Ⅱ、Ⅲ、Ⅳ染料残留的液相色谱-串联质谱的检测方法。方法禽蛋样品中的苏丹红经溶解、冷冻离心及过滤提取纯化,经ZorbaxSB-C_(18)(2.1 mm×50 mm, 3.5μm)色谱柱,以乙腈和0.2%的甲酸水溶液为流动相进行等度洗脱,温度为35℃,流速为0.2mL/min,外标法定量。结果在1~50μg/kg的浓度范围内,线性关系良好(r0.99),样品中的检出限0.5μg/kg,分析时间仅为5 min,加标回收率为69.5%~108.2%,相对标准偏差为1.6%~17.5%。结论该方法准确、快速、灵敏度高,适用于禽蛋中苏丹红染料的测定。  相似文献   

11.
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.  相似文献   

12.
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.  相似文献   

13.
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.  相似文献   

14.
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.  相似文献   

15.
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.  相似文献   

16.
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.  相似文献   

17.
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.  相似文献   

18.
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.  相似文献   

19.
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.  相似文献   

20.
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