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A branch of chemistry that deals with the development and use of techniques for chemical measurement. These techniques are used in analysing the chemical composition of substances. Chemical analysis may be qualitative or quantitative. Qualitative analysis involves attempting to identify what materials are present in a sample. Answering the question: "What is it?". Quantitative analysis involves determining how much of a material is present in a sample. Answering the question: "How much is present?".
Modern analytical methods make it possible to identify hundreds of components in a single sample and to detect specific substances present in less than one part per million.

See also: Tetrahedron Letters - procedures for the synthesis of organic compounds.