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Analytical chemistry
Industry: Chemistry
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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 ...
