2017/12/17 21:53
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方案摘要:
方案详情:
Plastics are ubiquitous in our society and are extensively used in a large variety of
packaged foods. A variety of chemicals that enhance the physical quality of plastics
are often added as well. Some commonly used additives include plasticizers (such
as phthalates) to improve flexibility, UV filters for protection from sunlight,
brightening agents, coloring agents, and preservatives. Enhanced by a number of
environmental factors, some of these additives may migrate into food products that
have been packaged using plastics. There is currently a great deal of interest in
measuring the migration of these compounds into food products, as considerable
uncertainty exists regarding the human health risks associated with exposure to
such compounds.
Gel permeation chromatography (GPC) is a highly effective method for the removal
of high molecular weight interferences such as lipids from a fatty food prior to
analysis for the compounds of interest. GPC has been used to clean up fatty foods
contaminated with plasticizers and other plastics additives.
This note describes the use of GPC clean‐up
to separate a variety of plastics additives,
such as phthalates, Chimassorb® 81 (a UV
absorber and stabilizer), Irganox® 1076 (an
optical brightener) and Uvitex® OB (an
antioxidant and thermal stabilizer) from a
representative edible oil sample prior to
analysis.
下载本篇解决方案:
使用Millipak® Final Fill过滤器及吹扫步骤达到最大化产品收率
Millipak® Final Fill过滤器的特殊层叠式设计可最大程度地减少残留体积,从而增加产品回收。过滤器吹扫亦可有效降低折叠膜和层叠式过滤器使用后的残留量。
生物产业
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Milli-Q IX 纯水系统:溶出度检测纯水解决方案
纯水是制备溶出溶剂或生物相关溶液的重要成分,因此水质的好坏会影响结果。一旦水质选择不当,就会引入污染物,主要有以下几种类型。使用高质量纯水来制备溶出溶剂,是获取精确、可重现结果并满足监管要求的重要保障。
制药/生物制药
2020/07/29
方向效应:解决食品中金属检测的挑战难题
金属检测技术的局限性之一是对于像电线和大头针这样相对比较小的、长条形金属异物就很难检测出来。这些类型的污染物通常表现出“方向效应”,即金属探测器所检测到的信号很大程度上取决于污染物与探测孔的方向关系。方向效应给金属检测系统带来了挑战——这一挑战乍一看并不是那么严重,但事实上它可能会给消费者的安全以及品牌声誉带来严重的影响和危害。
食品/农产品
2021/01/19
基于紫外分光光度法的水中油测试方法
矿物油组成中的共轭体系物质在紫外光区有较强的吸收,依据朗博 - 比尔定律,在256nm紫外光波长,可测定油样的吸光度来确定相应油的量。 由于紫外光度法对于油种的敏感性较强,本方法的油样需采用标准物质。
环保
2021/05/31