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Testing (Process of examining their)

the process of examining their composition. The term testing is usually confined to such examinations as reagents, with the view of discovering seek to determine what chemical elements or groups of elements are contained in any substance , without inquiring as to the quantity of these elements. Testing is carried out either by the application of chemical reactions to of reagents in solution to a solution of the substance under examination. solid substances, seek to determine what chemical elethe application instrument by which it is authenticated