German standard methods for the examination of water, waste water and sludge; summary indices of actions and substances (group H); water hardness (H 6)— 4 стр.
Testing of surface active agents; determination of the stability of surface active agents and products made of such against hard water; stability against water with only calcium hardness— 3 стр.
Testing of surface active agents and textile auxiliaries - Testing of the effect of levelling agents on vat dyeings on cellulosic fibres, levelling-out test in the dyebath— 5 стр.
German standard methods for the examination of water, waste water and sludge; parameters characterizing effects and substances (group H); determination of biochemical oxygen demand after n days, BOD<(Index)n>, using the dilution method (H 51)— 17 стр.
