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1.
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。  相似文献   

2.
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   

3.
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。  相似文献   

4.
高效液相色谱法测定食品中的酸性橙Ⅱ   总被引:1,自引:0,他引:1  
建立食品中非食用色素酸性橙Ⅱ的高效液相色谱快速检测方法。样品用饱和乙腈提取,经饱和正己烷萃取除去油溶性色素及杂质,采用高效液相色谱柱分离,二极管阵列检测器(DAD)检测,结合标准物质保留时间和DAD光谱图进行定性分析,外标法定量。色谱柱为AgilentZORBAXSB-C18(150mm×4.6mm,5μm),流动相为乙腈-体积分数0.3%醋酸溶液进行梯度洗脱,检测波长为484nm,线性范围为0.01~1.0μg/mL,相关系数R2=0.9997。采用本方法对乳制品、辣椒粉、辣椒酱、卤肉制品、卤蛋、卤豆腐干6种常见基质进行验证,结果表明,HPLC-DAD测定食品中的酸性橙Ⅱ,对于1.0g样品定容至5mL、进样量为20μL时,检出限为0.05mg/kg;添加标准回收实验表明,本方法在添加水平分别为0.05、0.1、0.2mg/kg时的样品平均回收率在74.9%~100.0%之间,相对标准偏差(RSD)在1.41%~8.64%之间(n=6)。本方法准确、可靠。  相似文献   

5.
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   

6.
采用高效液相色谱法同时测定鸡精中4种黄素色素(柠檬黄、日落黄、核黄素、姜黄素)含量。样品经甲醇-水超声提取后通过高效液相色谱分析,以色谱峰保留时间和紫外可见光谱进行定性。采用C18色谱柱,以乙腈-乙酸铵(0.02mol/L)为流动相,梯度洗脱,进样量20μL,检测波长430nm,峰面积外标法定量。结果表明:4种色素在0.20~10 mg/L范围内线性良好,相关系数均大于0.99,检出限(LODs,S/N=3)分别为0.045,0.06,0.075,0.075mg/kg,加标回收率在86.2%~101.2%之间,相对标准偏差(n=6)在0.97%~4.71%之间。  相似文献   

7.
《食品与发酵工业》2016,(1):183-188
建立了多种食品(葡萄酒、乳饮料、调制乳、海虾,熟鸡蛋,咸鸭蛋,肉制品,辣椒酱,辣椒粉)中的9种非食用色素酸性红1、酸性橙7、酸性黄36、苏丹红Ⅰ、苏丹红Ⅱ、苏丹红Ⅲ、苏丹红Ⅳ、碱性橙31、罗丹明B的液相色谱-串联质谱定量检测方法。分别对提取方式、不同食品的分类预处理方法和质谱条件进行了优化。并选择离子检测进行阳性验证,外标法定量分析了上述食品样品中的色素含量。该方法对于酸性红的最低检出限、线性范围和方法回收率分别为:0.10 mg/kg、0.10~0.50 mg/L和86.5%~95.3%;对于其他8种非食用色素的最低检出限、线性范围和方法回收率分别为:0.010 mg/kg、0.010~0.10 mg/L和86.5%~95.7%。  相似文献   

8.
采用凝胶渗透色谱(GPC)分离棕榈油中的对位红和苏丹色素,浓缩后用纯乙腈淋洗的高效液相色谱双波长检测法测定其中各待测组分的含量.测定结果表明最低检测限:对位红、苏丹Ⅰ、Ⅱ、Ⅲ、Ⅳ分别为0.03、0.06、0.10、0.08、0.10 mg/kg;相对标准偏差为2.15%~5.23%,平均回收率为83%~95%.操作方法简便,结果准确可靠.  相似文献   

9.
高效液相色谱法测定棕榈油中苏丹红、对位红   总被引:1,自引:0,他引:1  
俞晔  孙建刚  曹文忠 《食品科技》2006,31(12):138-140
样品经己烷溶解,再用乙腈萃取浓缩,经乙腈 异丙醇(1∶1)溶解过滤后,用反相高效液相色谱法-DAD检测器进行检测。方法最低检测限:苏丹红Ⅰ、苏丹红Ⅱ、苏丹红Ⅲ、苏丹红Ⅳ和对位红检测限均为10μg/kg,相对标准偏差为1.85%~5.74%,回收率为93.42%~108.38%。该方法简便、快速,稳定可靠。  相似文献   

10.
文章中建立了通过GPC净化处理,应用高效液相色谱法检测辣椒粉中苏丹红的实验方法。样品经乙酸乙酯/环己烷(1∶1)提取,通过GPC分离净化,浓缩后用乙腈定容,以0.1%甲酸的水溶液和乙腈(85∶15)以及0.1%甲酸的乙腈溶液和丙酮(80∶20)作为流动相进行梯度洗脱,经高效液相色谱分离,紫外检测器测定,外标法定量。该方法在0.05~5.0mg/L范围内呈良好的线性关系,平均回收率为88.1%~98.1%,相对标准偏差为0.90%~4.02%,检出限为0.0054~0.0088mg/kg。该方法精密度好,灵敏度高,能简便、快速、准确地测定辣椒粉中的苏丹红(Ⅰ,Ⅱ,Ⅲ,Ⅳ)残留量。  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.
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   

14.
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   

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.
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   

17.
18.
Capillary electrophoresis (CE) and polarized light microscopy (PLM) were utilized in the detection of the adulteration of locust bean gum with guar gum. For CE analyses, standards of locust bean and guar gums were extracted with 30% CH3CN, removing the residual proteins from the gum matrix. A 8.75 mM NaH2PO4-20.6 mM Na2B4O7 buffer, pH 9, was used to separate these proteins and to identify marker proteins that were present in the guar gum. These markers did not co-migrate with components in the extracts of mechanically processed locust bean gum, and are used as indicators of adulteration. Using PLM with toluidine blue and iodine staining techniques, unadulterated locust bean gum samples were distinguished from mixed samples through the differential staining of components in locust bean versus guar and tara gums. These experiments in the use of CE and PLM provide orthogonal and complementary methods for the verification of 'true' positives and the elimination of 'false' positives.  相似文献   

19.
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   

20.
An investigation is described in which various polyfunctional compounds were applied to wool in attempts to stabilize the temporary improvements in wrinkle-recovery brought about by ‘annealing’. Several reactive systems involving formaldehyde were found to produce the desired permanently improved wrinkle-recovery.  相似文献   

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