Analytical chemistry

Analytical chemistry

Industry: Chemistry

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Analytical chemistry

Absolute detection limit

Chemistry; Analytical chemistry

The smallest amount of an element or compound that is detectable in or on a given sample; expressed in terms of mass units or numbers of atoms or molecules.

In the separation of mixtures by paper chromatography or thin-layer chromatography, the production of coloured derivatives of the solutes by spraying the stationary phase with selective reagents in ...

Absolute method

Chemistry; Analytical chemistry

A method of chemical analysis that bases characterization completely on standards defined in terms of physical properties.

Peak width

Chemistry; Analytical chemistry

In a gas chromatogram (plot of eluent rise and fall versus time), the width of the base (time duration) of a symmetrical peak (rise and fall) of eluent.

Dielectric vapour detector

Chemistry; Analytical chemistry

Apparatus to measure the change in the dielectric constant of gases or gas mixtures; used as a detector in gas chromatographs to sense changes in carrier gas.

Absorptiometer

Chemistry; Analytical chemistry

1. An instrument equipped with a philtre system or other simple dispersing system to measure the absorption of nearly monochromatic radiation in the visible range by a gas or a liquid, and so ...