This is Daily English Learning of Analytical Instrument. Today the topic is Ion Chromatography（IC） NOW let's begin the part 1
Vocabularies: 键合型离子交换剂 bonded ion exchanger 进样阀 injection valve 金属氧化物固定相 metal oxides stationary phase 可交换离子 exchangable ion 离子交换剂 ion exchanger 离子交换柱 ion exchange column 两性离子交换剂 zwitterion exchanger 淋洗离子 eluent ion 馏分收集器 fraction collector 电子迁移率检测器 electron mobility detector 二 Sentence: 1. 离子色谱仪测定工业循环水中阴离子含量 Determination of Five Anions in Industrial Recycled Water by Ion Chromatography
2. 国产离子色谱仪直接进样测定饮用水中溴酸盐 Determination of bromate in drinking water by direct injection with Chinese-made ion chromatograph
3. 详细介绍了离子色谱仪的构造、功能，以及离子色谱技术的发展状况。 This paper introduced in detail instrument structure, function and technique development of ion chromatography.
4. 离子色谱仪检测离子的几点体会 Some Experience on Ion Chromatographic Instrument
5. 低压过渡金属离子色谱仪在制革化学中的应用 Application of Low Pressure Transition Metal Ion Chromatography in Leather 三 Principles: Ion chromatography is a chromatography process that separates ions and polar molecules based on their affinity to the ion exchanger. It works on almost any kind of charged molecule—including large proteins, small nucleotides, and amino acids. It is often used in protein purification, water analysis, and quality control.The water-soluble and charged molecules such as proteins, amino acids, and peptides bind to moieties which are oppositely charged by forming ionic bonds to the insoluble stationary phase. The equilibrated stationary phase consists of an ionizable functional group where the targeted molecules of a mixture to be separated and quantified can bind while passing through the column—a cationic stationary phase is used to separate anions and an anionic stationary phase is used to separate cations.
Cation exchange chromatography is used when the desired molecules to separate are cations and anion exchange chromatography is used to separate anions. The bound molecules then can be eluted and collected using an eluant which contains anions and cations by running higher concentration of ions through the column or changing pH of the column.
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