Fertilizers. Determination of different forms of nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods— 20 стр.
Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods— 20 стр.
Methods of test for petroleum and its products, Determination of the manganese content of gasoline. Atomic absorption spectrometry (AAS) method— 12 стр.