Degradation of Some Resistant Organic Compounds during Pressure Decomposition with Nitric Acid – Potassium Chlorate Reagent Solution

In a mixture of nitric acid and chloric acid, nitrate has been proven to be the oxidizing agent for the organic matrix to be digested. White precipitates obtained occasionally after microwave-assisted pressure digestion with potassium chlorate in dilute nitric acid solution, have been identified as nitrification products of phenyl alanine and tyrosine by 1H- NMR methods. Lowering sample weight leads to clear digests.