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Analytical chemistry
Industry: Chemistry
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Analytical chemistry
Thiele melting-point apparatus
Chemistry; Analytical chemistry
A stirred, specially shaped test-tube device used for the determination of the melting point of a crystalline chemical.
Tollen’s aldehyde test
Chemistry; Analytical chemistry
A test that uses an ammoniacal solution of silver oxides to test for aldehydes and ketones.
USP acid test
Chemistry; Analytical chemistry
A United States Pharmacopoeia test to determine the carbonizable substances present in petroleum white oils.
Van Deemter rate theory
Chemistry; Analytical chemistry
A theory that the sample phase in gas chromatography flows continuously, not stepwise.
Vigreaux column
Chemistry; Analytical chemistry
An obsolete apparatus used in laboratory fractional distillation; it is a long glass tube with indentation in its walls; a thermometer is placed at the top of the tube and a side arm is attached to a ...
Volhard titration
Chemistry; Analytical chemistry
Determination of the halogen content of a solution by titration with a standard thiocyanate solution.
Wagner’s reagent
Chemistry; Analytical chemistry
An aqueous solution of iodine and potassium iodide; used for microchemical analysis of alkaloids. Also known as Wagner’s solution.
