科技动态

食品添加剂检测方法又有突破厦门检验检疫局技术中心的食品化学检测专家组已研发出一套新方法,用于检测食品中的对位红,这也是他们继攻克苏丹红、孔雀石绿检测技术之后,在食品安全领域取得的又一突破。据介绍,厦门检验检疫局技术中心经过努力,在闽南地区率先建立起这套“对位红高效液相色谱检测法”,既可快速检出对位红,又可同时定性定量检出苏丹红1号、苏丹红2号、苏丹红3号、苏丹红4号。这一新的检测方法与欧盟检测苏丹红色素项目的方法是等效的,是欧盟认可的检测方法。另外,相关的液相串联质谱确证方法也正在积极研究中。(消息来源:《中…     

英国又发出“对位红”食品警告

据国际消息，英国政府发布“对位红”食品警告。到2005年5月8日英国食品标准局在原来35种含“对位红”的食品调料列表中，又新增加了12种发现含有“对位红”的食品添加剂或调料，自此，涉及“对位红”的食品调料达到47种之多。英国食品标准局称：“对位红”是一种工业染料，它的化学成分类似于苏丹红1号。英国食品标准局官方网站上显示，“对位红”食品列表会随时加入新涉及到的产品。     

固相萃取-超高效液相色谱串接四级杆质谱同时测定调味品中12种工业染料

目的建立调味品中苏丹橙、苏丹黄、苏丹Ⅰ～Ⅳ、溶剂蓝35、对位红、苏丹黑B、苏丹红7B、苏丹红G、苏丹棕等工业染料的固相萃取-超高效液相色谱串接四级杆质谱(SPE-UPLC-MS/MS)测定方法。方法以含10%乙醇的丙酮溶液作为提取溶剂,利用MAX强阴离子交换固相萃取柱(60mg,3ml)对样品进行净化,UPLC-MS/MS测定试样中12种工业染料的含量。结果方法的线性范围:对位红10.0～800.0ng/ml,其他11种染料5.0～400.0ng/ml。12种工业染料的定性检出限为0.3～10.4μg/kg。定量检出限为0.8～31.2μg/kg。高、中、低3个浓度水平的加标回收率77.1%～141.9%,相对标准偏差5.5%～26.4%。结论本方法灵敏、准确,可用于调味品中苏丹橙、苏丹黄、苏丹Ⅰ～Ⅳ、溶剂蓝35、对位红、苏丹黑B、苏丹红7B、苏丹红G、苏丹棕等12种非法添加的工业染料的同时测定及确证。     

苏丹红I在辣椒活性成分辣椒红和辣椒油树脂提取过程中的迁移规律研究

为了探究苏丹红I在辣椒活性成分辣椒油树脂和辣椒红提取过程中的迁移情况,本研究采用超高效液相色谱-串联质谱仪（UPLC-MS/MS）检测了辣椒、辣椒粉、辣椒粒、红辣素、辣椒红和辣椒油树脂中的苏丹红I含量,结合各产品的质量、色价、总辣椒碱变化分析苏丹红I迁移规律,并对迁移机理进行分析。结果显示,活性化合物的提取保留了辣椒原料中97%以上的色价和总辣椒碱。苏丹红I主要存在于辣椒皮中,其残留量占全辣椒的86%。辣椒中0.08~0.22 μg/kg的苏丹红I随着提取不断迁移到后续的提取产物中。辣椒经去籽粉碎后保留了70%的苏丹红I,随后的造粒、提取和分离过程并未引起苏丹红I迁移率显著变化。最终,67.56%的苏丹红I转移至辣椒红中,而辣椒油树脂中未检测到苏丹红I。苏丹红I的迁移性取决于苏丹红I、辣椒红和辣椒油树脂的溶解性能差异。     

胶体金免疫层析法快速检测食品中苏丹红I残留

通过设计合成苏丹红I衍生物,将其与明胶用混合酸酐法合成苏丹红I-明胶免疫抗原,免疫新西兰白兔制备抗苏丹红I多克隆抗体.采用柠檬酸三钠还原法制备颗粒大小为24.5 nm的胶体金,并制备苏丹红I-BSA抗原-胶体金复合物,组装检测试纸.实验结果表明,试纸条法的苏丹红I检测线为15 μg/kg,抗苏丹红I抗体与苏丹红Ⅱ、Ⅲ、Ⅳ均无交叉反应性,与高效液相测定差异不显著.检测时间5min,适用于食品中苏丹红I残留的快速检测.     

苏丹红Ⅰ、Ⅲ和对位红竞争ELISA检测方法的初步建立

以4-氨基苯甲酸重氮化后与2-萘酚反应,合成苏丹红Ⅰ号的衍生物（CSDI）,以活性脂法将CSDI与蛋白载体偶联,制备CSDI-BSA免疫抗原与CSDI-OVA检测抗原。以CSDI-BSA免疫Balb／c小鼠,适当免疫后取脾细胞与SP2／0融合,筛得抗CSDI的单克隆抗体细胞株5H3。以该细胞株生产抗体与CSDI-OVA建立CSDI的间接竞争ELISA检测方法,该方法对苏丹红Ⅰ、Ⅲ和对位红的灵敏度约为0．1ng／ml,IC50分别为1．03、1．13、0．89ng／ml,与其他染料交叉反应率低。该ELISA检测方法灵敏、特异,可用于苏丹红Ⅰ、Ⅲ和对位红的快速检测。     

辣椒油中苏丹红I号检测能力验证研究

为了解我国食品检测实验室的苏丹红I号检测能力,国家认监委组织实施了辣椒油中苏丹红I号检测能力验证工作。30个省、市、自治区的112个实验室参加了本次能力验证,推荐的测试方法为:食品中苏丹红染料的检测方法—高效液相色谱法(GB/T19681—2005)和欧盟官方方法,也可采用其他方法。结果显示:实验室满意结果率为79·5%,可疑结果率为6·3%,不满意结果率为14·2%;国标方法的满意结果率为79·8%,欧盟方法的结果满意率为54·5%。本次能力验证国标法的结果优于欧盟法的结果。参加能力验证的绝大多数实验室可以准确检测苏丹红I号。     

HPLC紫外检测法测定辣椒制品中苏丹红I～IV号含量的研究

实验选用氟罗里硅土(FLORISIL)固相萃取(SPE)柱对样品进行净化,用DIKMA公司C18(150×4.6mm,5μm)钻石柱为色谱柱,以含5%水的乙腈溶液为流动相,以229nm为检测波长,对辣椒食品中的苏丹红I～IV号进行了分离和检测。结果显示:苏丹红I～IV号分别在0.625～2000ng、2.5～2000ng、5～2000ng、5～2000ng范围内呈良好的线性关系,相关系数R2分别为1、1、0.9989和0.9990。其标准回收率分别为100.76%、100.20%、99.86%、100.09%,变异系数分别为1.04%、1.80%、3.29%、3.06%。辣椒粉样品中的苏丹红I～IV号的加样回收率分别为102.14%、103.69%、96.36%和101.93%,变异系数分别为1.49%、0.84%、0.93%和3.64%;辣椒油样品中的苏丹红I～IV号的加样回收率分别为97.03%、100.81%、94.53%和99.31%,变异系数分别为2.85%、1.71%、1.92%和2.79%。苏丹红I～IV号的最低检测限分别为1.88、2.5、6.25和10μg/kg。该方法样品处理简单,灵敏度高,可在有关实验室推广应用。     

氧化铝柱-高压液相色谱法测定重庆火锅底料中7种非食用色素及暴露评估

为了调查、评估重庆火锅底料中7种非食用色素的安全性,经氧化铝柱净化、高压液相色谱法同时测定100组重庆产火锅底料中7种非食用色素碱性橙Ⅱ、罗丹明B、对位红、苏丹红Ⅰ、苏丹红Ⅱ、苏丹红Ⅲ、苏丹红Ⅳ。利用基于Monte Carlo模拟技术的Crystal Ball风险评估软件模拟和抽样对重庆火锅底料中7种非食用色素暴露量和风险进行了非参数概率评估,结果表明,重庆产火锅底料中7种非食用色素均低于方法检出限(碱性橙Ⅱ0. 106 mg/kg、罗丹明B 0. 010 mg/kg、对位红0. 006 mg/kg、苏丹红Ⅰ0. 086 mg/kg、苏丹红Ⅱ0. 138 mg/kg、苏丹红Ⅲ0. 014 mg/kg、苏丹红Ⅳ0. 004 mg/kg),摄食重庆火锅底料对不同年龄段居民带来7种非食用色素危害概率为0%。该研究为指导重庆火锅的安全食用及今后的风险管理提供理论依据。     

高效萃取体系RP-HPLC测定食品中的对位红和苏丹红

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...     

Review of techniques to manufacture micro-hydrogel particles for the food industry and their applications

Microgels are ‘soft’ microscopic cross-linked polymeric particles that are being increasingly exploited in a variety of industries for rheology control, encapsulation and targeted delivery. They are valued because of the ability to tune their functionality to address specific applications in oil recovery, coatings, drug delivery, cosmetics, personal care and foods. Food microgels are typically biopolymer hydrogels in the form of microspheres, nanospheres (also called nanogels), spheroids and fibres. The utilisation of engineered microgels in foods has so far been limited, despite their great potential to address several needs in the food industry, including: satiety control, encapsulation of phytonutrients and prebiotics, texture control for healthier food formulations (e.g. reduced fat products), and targeting delivery to specific areas in the digestive tract. We review the scientific and patent literature on the utilisation and manufacturing methods for producing microgels with an emphasis on micro-hydrogels for food applications.     

12—A CRITIQUE OF SOME HYPOTHESES RELATING TO THE HETEROGENEITY OF THE HIGH-SULPHUR PROTEINS OF WOOL

Joubert and Burns prepared a large number of fractions from the high-sulphur proteins of wool and estimated their molecular weights and amino-acid compositions. Their data have been re-examined in order to look for statistically significant interrelations between amino acids and between the proportion of various amino acids and molecular weight. Statistical analysis of the data is also used to examine the credibility of some hypotheses concerning the mechanism of keratin biosynthesis and to provide further evidence for the existence of families of proteins within the high-sulphur fractions of wool.     

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 Latest Data about Development of Chinese Printing Industry in 2013

In the 2014 China（Shanghai）International Printing Week,Director Wang Yanbin released the latest data about development of Chinese printing industry in 2013.According to statistics,in 2013,the total output value of Chinese printing industry exceeded 1trillion Yuan for the first time,reaching 1.03985 trillion Yuan.There were 105,000 printing enterprises in China,employees were 3.415 million.The total asset was 1.06247 trillion Yuan;     

The State Council Issued "Directory of Government Approved Investment Projects(2013 Edition)"

正On December 2nd,2013,the State Council issued the notification of"Directory of Government Approved Investment Projects(2013 Edition)"(hereafter referred to as"notification").It is pointed out in the"notification"that in order to further deepen reforms in investment systems and administrative examination and approval systems,simplify administrative procedures and delegate powers to lower levels,earnestly     

Top Ten News of China's Paper Industry 2013

On December 24th, 2013, the meeting on the selection of top 10 news of China＇s paper industry 2013 sponsored by 〈China Paper Newsletters〉 was held in Beijing. The yearly selection of the top l0 news, which began in 2000, has become a brand activity widely recognized in the industry thanks to the support from the authorities at all levels and public participation.     

National Development and Reform Commission Issued Announcement for Selection of Major Preliminary Research Projects for the "13~(th) Five-Year Plan"

In Apri Commi major p Plan＂ （h 2014, the National Development and Reform ssion issued an announcement for selection of reliminary research projects for the ＂13th Five-Year ereafter referred to as ＂The Announcement＂）     

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 latest scientific     

China textile machinery: taking off in progress

正Among the 1600 exhibitors who take apart in the ITMA ASIA+CITME2014 2/3 are Chinese manufactures.If the numerous figures failed to attract your attention,the increase of quality should draw your focus.To adopt the demand of developing textile machine market,domestic textile machinery enterprises now follow the slogan of"technology drives development"to enhance product competitiveness.Our domestic sellers will showcase product ranging from spinning,weaving,dyeing and printing,     

Anti-mutagenic compounds from corn

In previous studies with aflatoxin-contaminated corn an uncharacteristic response for AFB₁ in the Salmonella/microsomal mutagenicity assay (Ames test) was observed and the presence of anti-aflatoxin factors in the corn was suggested. In the current study, corn was extracted and fractionated using thin layer chromatography (TLC) using different developing solvent systems and the Ames test was used to monitor for anti-mutagenic activity in the corn fractions. Both Salmonella tester strains TA98 and TA100 with metabolic activation (S9) were used. Several corn fractions, at different stages in the isolation and purification process, showed anti-mutagenic dose-responses when exposed to pure AFB₁. Corn extracts were non-toxic to the tester strains and TLC fractions that showed the best anti-mutagenic dose-responses were selected for further partial characterization analyses.