German standard methods for the examination of water, waste water and sludge; anions (group D); photometric determination of chromium(VI) using 1,5-diphenylcarbonohydrazide (D 24)— 10 стр.
Paints and varnishes; Determination of 'soluble' metal content; Part 5 : Determination of hexavalent chromium content of the pigment portion of the liquid paint or the paint in powder form; Diphenylcarbazide spectrophotometric method— 5 стр.
Characterisation of waste and soil - Determination of Chromium(VI) in solid material by alkaline digestion and ion chromatography with spectrophotometric detection; German version EN 15192:2006— 28 стр.
