食品中6种甜味剂同时检测方法的研究---优秀毕业论文 参考文献 可复制黏贴.docx
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1、 食品中 6 种甜味剂同 时 检测方法的研究 1 食品中 6 种甜味剂同时检测方法的研究 摘 要 甜味剂是食品添加剂中一类重要的产品 ,在世界范围内其应用量在各类食 品添加剂中一直排在前列 ,按营养性价值甜味剂分为非营养高倍甜味剂和营养 性甜味剂 ,被国际食品法典委员会 (CAC)确认的高倍甜味剂有糖精钠、甜蜜素、 AK 糖 (安赛蜜 ) 、阿斯巴甜、三氯蔗糖、阿力甜、纽甜、甜菊苷等。 随着经济的发展,人民生活水平的不断提高,人们对食品已经不再仅仅要求 温饱、美味, “ 吃的放心 ” 越来越成为人们简单却倍受困扰的愿望。近几年高倍 甜味剂在我国生产上已被越来越多的应用。因为高倍甜味剂的甜度是蔗
2、糖的几十 倍或是几百倍,而使用成本远远低于蔗糖,所以食品生产者不顾消费者的健康和 生命安全超范围、超量使用甜味剂等问题也确实存在,而且为了改善口感 , 提 高甜味剂的甜味稳定性 ,大多数甜味剂由多种成分复合使用。 事实上 ,我国卫生部 2011 年发布的食品添加剂使用标准 GB 2760 - 2011 中对人工甜味剂的加入量有严格规定。但是由于检测方法存在国家标准、行业标 准、地方标准和部分的国外标准等不统一性,使甜味剂的检测方法极度的不统一, 前处理和检测条件要求水品参差不齐,目标物的最低检出限量更是高低不一,有 的相差几倍甚至上百倍。因为当今法规标准的这些缺陷,使食品生产监管部门在 监督管
3、理和执法上存在了很大的困难,有法难依。而且已有的检测标准大都是单 一的甜味剂检测方法,对于复合使用的甜味剂检测,使用已有的检测方法不能同 时检出多种目标物,要进行多次检测,存在前处理重复性,检测过程重复性,检 测周期长,检测不全面,检测成本高,检测效率低等问题,所以为了保证食品质 量安全 , 防止甜味剂的滥用,给监督监管提供执法依据,现在迫切需要建立一 种能够 同时测定食品中多种甜味剂的方法。 已有的文献甜味剂的检测主要集中在糖精钠、甜蜜素、安赛蜜、阿斯巴甜等 项目上,或是甜味剂与山梨酸、苯甲酸、脱氢乙酸等防腐剂同时检测,有的是以 上几种甜味剂、防腐剂与诱惑红、赤藓红、日落黄等色素同时检测,通
4、过广泛查 阅国内外资料,发现,食品中甜味剂的研究在国外很早就是一个研究热点;我国 对甜味剂的研究也做了大量工作,有个别的常见的高倍甜味剂例如阿斯巴甜、纽 食品中 6 种甜味剂同 时 检测方法的研究 2 甜、阿力甜等的检测方法较成熟,并且已经制定了许多有关甜味剂的标准。这些 甜味剂的检测方法大都采用高效液相色谱法,但是由于这些甜味剂的结构不同, 大多采用不同的检测器,所以以上所涉及的甜味剂没有一个稳定有效的分析方法 可以同时将其检出。 本研究建立了食品中多种甜味剂同时测定的高效液相色谱 -质谱联用检测方 法。主要是通过对食品中的饮料类、果酒类、糕点类、腌菜类基质进行实验研究, 通过沉淀剂的添加,
5、 SPE 柱的选择等方法,建立适合各种基质的目标化合物的提 取和净化技术,进而富集目标化合物和去除杂质,同时消除食品中复杂基质的干 扰,建立了对目标物质进行分离的液相色谱及质谱仪器条件,使大多数目标化合 物都能达到良好的色谱 /质谱响应和分离。对目标化合物在确定的最佳仪器条件 下进行浓度与峰面积的线性关系测定,得到六种甜味剂在 0.01-0.5mg/L,三氯蔗 糖在 1.0-4.0mg/L 范围内浓度与峰面积呈 现良好的线性关系 ,相关系数 在 0.98919-0.99965 之间。 通过对不同基质进行标准添加回收,以 3 倍的信噪比确定方法的最低检测限, 最低检测限在 2.42-3.95 g
6、/L,三氯蔗糖在 6.67mg/L。对不同基质进行方法确证, 确保方法的科学性和适用性,不同基质样品回收率在 78.67%-102.23%范围内,确 定了方法的适用性,从而对食品中的甜味剂建立了一套系统性和完整性的检测方 法。对本实验建立的方法分别进行了三水平方 法验证实验,平均相对标准偏差在 2.21%-4.98%之间,结果表明:方法的重复性和再现性良好。 关键词: 甜味剂 高效液相色谱质谱法 检测 高效液相色谱 食品中 6 种甜味剂同 时 检测方法的研究 3 The Simultaneous detection Method Of 6 Types of Sweeteners In Food
7、 Abstract The sweetener is one of the important class of products in food additives. In the world, the mount of its application has been the top row in various types of food additives. According to nutritional value, the sweetener is divided into non-nutritive high-intensity sweeteners and nutritive
8、 sweeteners. The international Codex Alimentarius Commission (CAC) confirm the high-intensity sweeteners are Saccharin、 Cyclamate, Acesulfame, Aspartame, Sucralose, Alitame, Neotame, Stevioside, etc. With economic development, continuous improvement of living standards, the food is no longer require
9、d only food and clothing. Delicious, at ease to eat more and more become a simple but highly troubled people s desire. In recent years, sweeteners in China has been more and more applied. The sweetness of sweeteners is a few times or hundreds of times to sucrose, but the use cost is far lower than s
10、ucrose, so the sweeteners used beyond the scope of the excessive do exist by the food producers, that regardless of consumers health and safety. And in order to improve the taste and the stability of the sweetener sweet, a variety of sweeteners has been combined use. In fact, the use of artificial s
11、weeteners has been strict required by the use of food additives standard GB 2760 2011”, which is released by Chinas Ministry of Health in 2011. However, national standards, industry standards, local standards, and some foreign standards make the detection methods not unity., Pre-treatment and testin
12、g conditions , target minimum detection limit are different, and some difference is between times or even a hundred times. Because of these shortcomings of the current regulations and standards, there are a lot of difficulties in the supervision and management and law enforcement by supervision depa
13、rtment for food production, it is difficult to according law. Existing testing standards are the single sweetener detection method, The compound used of sweetener can not be detected by the existing detection methods at the same time, it should be tested many times. Pre-treatment repeatability, test
14、ing long cycle, testing not comprehensive, high cost of detection and low detection efficiency are exist. Therefore, in order to ensure food quality and safety, to prevent abuse of the sweetener, to providing enforcement supervision and regulatory basis, a determination of multiple sweeteners at the
15、 same time is now urgently need to establish. Researcher or scientist has focused on the detection of sweeteners Saccharin, Cyclamate, Acesulfame, Aspartame and other projects, or sweeteners and Sorbic Acid, Benzoic Acid, Dehydroacetic Acid and other preservatives simultaneous detection, Some of the
16、se types of sweeteners, preservatives and the temptation to red, erythrosine, sunset yellow and other colors simultaneously detect, through a wide access to domestic and international data, it is found that the sweetener in food research is a hot spot early abroad . A lot of work on the sweeteners h
17、as been done in China, some of the common high-intensity sweeteners such as aspartame, Neotame, Alitame detection methods are mature and have developed a number of the sweetener the standards. Most of these sweeteners detection method use high performance liquid chromatography, but due to the differ
18、ent structure of these sweeteners, different detectors has been used. So there is not a stable and efficient analytical methods can detect more than one sweetener 食品中 6 种甜味剂同 时 检测方法的研究 4 involved. This study established 6 types of Sweeteners in food in the simultaneous determination of high-performa
19、nce liquid chromatography - mass spectrometry detection. Mainly through the food in the beverage, wine classes, pastry classes, pickles class matrix. By the addition of the precipitant, the SPE column selection and so on, optimize extraction and purification technology of the target compounds for a
20、variety of matrix, and thus enrich target compounds and remove impurities, and eliminate interference of the complex food matrix at the same time. The target substance liquid chromatography separation and mass spectrometer conditions were optimized device selection, the majority of target compounds
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