German standard methods for the examination of water, waste water and sludge; gaseous constituents (group G); determination of oxygen saturation index (G 23)— 8 стр.
German standard methods for the examination of water, waste water and sludge; gaseous constituents (group G); determination of dissolved oxygen in water, Winkler iodometric method (G 21)— 11 стр.
German standard methods for the examination of water, waste water and sludge; gaseous constituents (group G); determination of dissolved oxygen using the membrane oxygen probe (G 22)— 15 стр.
