| http://www.w3.org/ns/prov#value | - As the hydrogen donor, the colouring reagent generally contains a compound such as phenol, dimethylaniline, diethylaniline, o-tolidine, o-toluidine, p-toluidine, o-phenylenediamine, N,N'-dimethyl-p-phenylenediamine, benzidine, o-anisidine, p-anisidine, dianisidine, o-cresol, m-cresol, ??-naphthol, ??-naphthol, catechol, guaiacol, pyrogallol, 2,7-diaminofluorene or leucoindophenol, and as the elect
|
