Ключевые слова:
Precipitation methods, Coke, Sulfur, Test equipment, Determination of content, Spectrochemical analysis, Gravimetric analysis, Lignite, Volumetric analysis, Calibration, Precision, Coal products, Iron, Testing conditions, Chemical analysis and testing, Fuels, Pyrites, Reproducibility, Atomic absorption spectrophotometry, Sulfur inorganic compounds, Solid fuels, Sulfur organic compounds, Specimen preparation, Colorimetry, Extraction methods of analysis, Sulfates, Coal, Equations, Fossil fuels