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Analytical chemistry

Contributors in Analytical chemistry

Analytical chemistry

Gradient elution analysis

Chemistry; Analytical chemistry

A form of gas-liquid chromatography in which the eluting solvent is changed with time, either by gradually mixing a second solvent of greater eluting power with the first, less powerful solvent, or ...

Carbon replication

Chemistry; Analytical chemistry

A faithful carbon-film, mould of a specimen surface (for example, powders, bones, or crystals) which is thin enough to be studied by electron microscopy.

Sedimentation equilibrium

Chemistry; Analytical chemistry

The equilibrium between the forward movement of a sample’s liquid-sediment boundary and reverse diffusion during centrifugation; used in molecular-weight determinations.

Gravimetric absorption method

Chemistry; Analytical chemistry

A method of measuring the moisture content of a gas in which a known volume of gas is passed through a suitable desiccant, such as phosphorus pentoxide or silica gel, and the change in weight of the ...

Carrier gas

Chemistry; Analytical chemistry

In gas chromatography, a gas used as an eluant for extracting the sample from the column as the gas passes through. Also known as eluant gas.

Sedimentation velocity

Chemistry; Analytical chemistry

The rate of movement of the liquid-sediment boundary in the sample holder during centrifugation; used in molecular-weight determinations.

Column chromatography

Chemistry; Analytical chemistry

Chromatographic technique of two general types: packed columns usually contain either a granular adsorbent or a granular support material coated with a thin layer of high-boiling solvent ...

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