ISO 10390:1994 PDF

Specifies an instrumental method for the routine determination of pH using a glass electrode in a 1:5 (V/V) suspension of soil in water (pH-H2O), in a solution of 1 mol/l potassium chloride (pH-KCl) or in a solution of 0,01 mol/l calcium chloride (pH-CaCl2). Is applicable to all types of air-dried soil samples, e.g. pretreated according to ISO 11464.