Analytical chemistry

Analytical chemistry

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Analytical chemistry

cyclic chronopotentiometry

Chemistry; Analytical chemistry

An analytic electrochemical method in which instantaneous current reversal is imposed at the working electrode, and its potential is monitored with time.

visual colorimetry

Chemistry; Analytical chemistry

A procedure for the determination of the color of an unknown solution by visual comparison to color standards (solutions or color-tinted disks).

A variation of paper chromatography in which an electric current is applied to the ends of the electrolyte-impregnated absorbent paper, thus moving chargeable molecules of the unknown sample toward ...

density gradient centrifugation

Chemistry; Analytical chemistry

Separation of particles according to density by employing a gradient of varying densities; at equilibrium each particle settles in the gradient at a point equal to its density.

volumetric analysis

Chemistry; Analytical chemistry

Quantitative analysis of solutions of known volume but unknown strength by adding reagents of known concentration until a reaction end point (color change or precipitation) is reached; the most ...

paper-tape chemical analyzer

Chemistry; Analytical chemistry

Chemically treated paper tape that is continuously unreeled, exposed to the sample, and viewed by a phototube to measure the color change that is empirically related to changes in the sample’s ...

derichment

Chemistry; Analytical chemistry

In gravimetric analysis by coprecipitation of salts, a system with _ less than unity, when _ is the logarithmic distribution coefficient expressed by the ratio of the logarithms of the ratios of the ...