Analytical chemistry

Analytical chemistry

Industry: Chemistry

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Analytical chemistry

adsorption indicator

Chemistry; Analytical chemistry

An indicator used in solutions to detect slight excess of a substance or ion; precipitate becomes colored when the indicator is adsorbed. An example is fluorescein.

photoelectric colorimetry

Chemistry; Analytical chemistry

Measurement of the colorant concentration in a solution by means of the tristimulus values of three primary light filter-photocell combinations.

dry point

Chemistry; Analytical chemistry

The temperature at which the last drop of liquid evaporates from the bottom of the flask.

affinity chromatography

Chemistry; Analytical chemistry

A chromatographic technique that utilizes the ability of biological molecules to bend to certain ligands specifically and reversibly; used in protein biochemistry.

photometric titration

Chemistry; Analytical chemistry

A titration in which the titrant and solution cause the formation of a metal complex accompanied by an observable change in light absorbance by the titrated solution.

duplicate measurement

Chemistry; Analytical chemistry

An additional measurement made on the same (identical) sample of material to evaluate the variance in the measurement.

alkalimeter

Chemistry; Analytical chemistry

1. An apparatus for measuring the quantity of alkali in a solid or liquid. 2. An apparatus for measuring the quantity of carbon dioxide formed in a reaction.