German standard methods for the examination of water, waste water and sludge - Anions (group D) - Part 52: Photometric determination of dissolved chromium(VI) in water (D 52)— 33 стр.
German standard methods for the examination of water, waste water and sludge - Anions (group D) - Part 52: Photometric Determination of dissolved chromium(VI) in water (D 52)