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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).
paper electrophoresis
Chemistry; Analytical chemistry
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 ...