Testing of ceramic materials; chemical analysis of silicon carbide used as raw material and as constituent in materials; decomposition with sodium carbonate and boric acid— 2 стр.
Testing of ceramic materials; chemical analysis of alumosilicates; determination of the iron and manganese content by atomic absorption spectrometry— 4 стр.
Testing of ceramic materials; chemical analysis of materials of above 80 per cent by weight magnesium oxide content, determination of the total of magnesium oxide, calcium oxide and manganese(II)-oxide and calculation of magnesium oxide by substraction— 2 стр.
