Analytical chemistry

Analytical chemistry

Industry: Chemistry

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Analytical chemistry

Ascending chromatography

Chemistry; Analytical chemistry

A technique for the analysis of mixtures of two or more compounds in which the mobile phase (sample and carrier) rises through the fixed phase.

Precipitation indicator

Chemistry; Analytical chemistry

In a titration, a substance that precipitates from solution in a clearly visible form at the end point.

Electron-capture detector

Chemistry; Analytical chemistry

Extremely sensitive gas chromatography detector that is a modification of the argon ionisation detector, with conditions adjusted to favour the formation of negative ions.

Ashing

Chemistry; Analytical chemistry

An analytical process in which the chemical material being analysed is oven-heated to leave only noncombustible ash.

Precipitation number

Chemistry; Analytical chemistry

The number of millilitres of asphaltic precipitate formed when 10 millilitres of petroleum-lubricating oil is mixed with 90 millilitres of a special-quality petroleum naphtha, then centrifuged ...

Electron probe x-ray microanalysis

Chemistry; Analytical chemistry

An analytical technique that uses a narrow electron beam, usually with a diameter less than 1 millimeter, focused on a solid specimen to excite an x-ray spectrum that provides qualitative and ...