Methods of testing soil for engineering purposes - Part D - Soil chemical tests - Determination of the pH value of a soil - Colorimetric method (subsidiary method)
Methods of testing soil for engineering purposes - Part D - Soil chemical tests - Determination of the pH value of a soil - Colorimetric method (subsidiary method)
Methods for testing anodic oxidation coatings on aluminium and aluminium alloys, Part 2.5: Sealing property tests - Phosphoric-chromic acid test of anodic oxidation coatings