Mineralization (chemistry)

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Mineralization of organic nitrogen in sulfuric acid (Kjeldahl method)

Mineralisation - in analytical chemistry it is the total decomposition of organic matter into simple solid inorganic compounds, usually by careful oxidation or evaporation. As a result of this process, hydrogen, carbon, sulfur and nitrogen are completely removed from the sample, which evaporate in the form of water vapor and corresponding gaseous oxides, and the residue is the oxides and salts of other elements present in the substance being analyzed. Once the mineralization was carried out so-called. usually by heating the samples with the addition of strong oxidizing acids such as sulfuric acid. At present, analytical laboratories practice a dry method that involves heating samples in well ventilated microwave ovens. Mineralization is usually carried out to determine the presence of trace elements and to determine their concentration in the test substance.

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