Analytical chemistry

Analytical chemistry

Industry: Chemistry

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Analytical chemistry

Dissymmetry coefficient

Chemistry; Analytical chemistry

Ratio of the intensities of scattered light at 45 and 135_, used to correct for destructive interference encountered in light-scatteringphotometric analyses of liquid samples.

Acidimetry

Chemistry; Analytical chemistry

The titration of an acid with a standard solution of base.

Phosphate buffer

Chemistry; Analytical chemistry

Laboratory pH reference solution made of KH 2 PO 4 and Na 2 HPO 4 ; when 0.025 molal (equimolal of the potassium and sodium salts), the pH is 6.865 at 25_C.

Distribution law

Chemistry; Analytical chemistry

The law stating that if a substance is dissolved in two immiscible liquids, the ratio of its concentration in each is constant.

Acrolein test

Chemistry; Analytical chemistry

A test for the presence of glycerin or fats; a sample is heated with potassium bisulfate, and acrolein is released if the test is positive.

Phosphorimetry

Chemistry; Analytical chemistry

Low-temperature, analytical procedure related to fluorometry; based on the nature and intensity of the phosphorescent light emitted by an appropriately excited molecule.

Distribution ratio

Chemistry; Analytical chemistry

The ratio of the concentrations of a given solute in equal volumes of two immiscible solvents after the mixture has been shaken and equilibrium established.