Analytical chemistry

Analytical chemistry

Industry: Chemistry

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Analytical chemistry

Weisz ring oven

Chemistry; Analytical chemistry

A device for vaporization of solvent from filter paper, leaving the solute in a ring (circular) shape; used for qualitative analysis of very small samples.

Wijs’ iodine monochloride solution

Chemistry; Analytical chemistry

A solution in glacial acetic acid of iodine monochloride; used to determine iodine numbers. Also known as Wijs’ special solution.

Winkler titration

Chemistry; Analytical chemistry

A chemical method for estimating the dissolved oxygen in seawater: manganous hydroxide is added to the sample and reacts with oxygen to produce a manganese compound which in the presence of acid ...

Zerewitinoff reagent

Chemistry; Analytical chemistry

A light-colored methylmagnesium iodide-n-butyl ether solution that reacts rapidly with moisture and oxygen; used to determine water, alcohols, and amines in inert solvents.

Zimm plot

Chemistry; Analytical chemistry

A graphical determination of the root-square-mean end-toend distances of coillike polymer molecules during scattered-light photometric analyses.

Acree’s reaction

Chemistry; Analytical chemistry

A test for protein in which a violet ring appears when concentrated sulfuric acid is introduced below a mixture of the unknown solution and a formaldehyde solution containing a trace of ferric ...