Stabilized materials for civil engineering purposes, General requirements, sampling, sample preparation and tests on materials before stabilization— 20 стр.
Fertilizers. Chemical analysis. Determination of nitrogen, Method for determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide (titrimetric method)— 14 стр.
Fertilizers. Chemical analysis. Determination of potassium, Preparation of the test solution for determination of water-soluble potassium content— 10 стр.
Fertilizers. Chemical analysis. Determination of potassium, Preparation of the test solution for determination of acid-soluble potassium content— 10 стр.
Fertilizers. Chemical analysis. Determination of nitrogen, Method for determination of total nitrogen content (titrimetric method after distillation)— 14 стр.