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Qualitative chemical analysis --- Quantitative chemical analysis --- Petroleum --- Coal --- Geochemistry --- Mechanical Engineering --- Engineering & Applied Sciences --- Metallurgy & Mineralogy --- Sulfur content --- Sulphur content --- Congresses --- Petroleum - Sulphur content - Congresses. --- Coal - Sulphur content - Congresses. --- Geochemistry - Congresses.
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Organonitrogen compounds --- Polycyclic aromatic hydrocarbons
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