--subdivision Analysis under substances or chemicals for works on methods of analyzing these items or analyzing a sample to determine the presence or quantity of these items, and for works presenting the results of analyzing substances not produced naturally, e.g. Concrete--Analysis; Corn--Analysis
-- See Also Metallurgical analysis Here are entered works dealing on the analysis of metals, ores, slags, etc. treated collectively. Works on the analysis of metals are entered under Metals--Analysis. --subdivision Analysis under substances, e.g. Copper--Analysis; Alloys--Analysis; Iron ores--Analysis
--subdivision Separation under individual chemicals and groups of chemicals, e.g. Insulin--Separation
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-- See Also the narrower term Speciation (Chemistry) Here are entered works on the determination of the various physico-chemical forms or species of chemicals present in environmental samples and the description of their distribution and transformation, particularly those species which are biologically active. --subdivision Speciation under individual chemicals and groups of chemicals, e.g. Copper--Speciation; Trace elements--Speciation