第十二单元What_is_Analytical_Chemistry资料.docVIP

Unit 12 What is Analytical Chemistry Perhaps the most function definition of analytical chemistry is that it is the qualitative and quantitative characterization of matter .也许对分析化学最实用的定义是：对物质进行定性和定量的表征。The word characterization is used in a very broad sense .描述这个词被广泛的使用。It may mean the identification of the chemical compounds or elements present in a sample to answer questions such as Is there any vitamin E in this shampoo as indicated on the label ?or Is this white tablet an aspirin tablet ?orIs this piece of metal iron or nickel ?它可能意味着在回答诸如“在洗发香波中是否如标签所示有维生素E”“这是一个白色阿司匹林片？”或“这块金属是铁或镍”等问题时，对样本中的化合物或元素进行鉴定。This type of characterization ,to tell us what is present is called qualitative analysis .这种类型的表征，要告诉我们什么是目前被称为的定性分析。Qualitative analysis is the identification of one or more chemical species present in a material .定性分析是鉴定一个或多个化学物质存在于一个材料中。Characterization may also mean the determination of how much of a particular compound or element is present in a sample ,to answer questions such as How much acetylsalicylic acid is in this aspirin tablet ?or How much nickel is in this steel ?描述也意味着种化合物或元素存在于一个该药物可能有机和无机两种。湿化学方法这意味着分析化学家可能需要理解材料科学、冶金、生物学、药理学、农业科学、食品科学、地质学、和分析化学领域的迅猛发展。测量的物质被称为分析物。