Analytical chemistry

Analytical chemistry

Industry: Chemistry

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Analytical chemistry

Spiral wire column

Chemistry; Analytical chemistry

An analytical rectification (distillation) column with a wire spiral the length of the inside of the column to serve as a liquid-vapor contact surface.

Variation on paper-chromatography analysis; a labelled radioisotope of the same type as the one being quantitated is added to the solution, then quantitatively analysed afterward via radioactivity ...

Circular paper chromatography

Chemistry; Analytical chemistry

A paper chromatographic technique in which migration from a spot in the sheet takes place in 360_ so that zones separate as a series of concentric rings.

Spot test

Chemistry; Analytical chemistry

The addition of a drop of reagent to a drop or two of sample solution to obtain distinctive colours or precipitates; used in qualitative analysis.

Kauri-butanol value

Chemistry; Analytical chemistry

The measure of millilitres of paint or varnish petroleum thinner needed to cause cloudiness in a solution of kauri gum in butyl alcohol.

Standardisation

Chemistry; Analytical chemistry

A process in which the value of a potential standard is fixed by a measurement made with respect to a standard whose value is known.

Sedimentation balance

Chemistry; Analytical chemistry

A device to measure and record the weight of sediment (solid particles settled out of a liquid) versus time; used to determine particle sizes of fine solids.