FIELD: analysis of materials. SUBSTANCE: method involves the steps of: treating a sample of matter to be analyzed with a mixture of methanol and propanol taken in volume ratio of 1: 1, sequentially treating the obtained solution with concentrated sulfuric acid and 1 % potassium permanganate aqueous solution taken in volume ratio of 7: 1 respectively, further repeated sequential treatment with concentrated sulfuric acid and 1% potassium permanganate aqueous solution taken in volume ratio of 0.08: 0.04. The obtained solutions are subjected to fluorimetry at fluorescence excitation maximum of 385 nm and fluorescence emission of 500 nm. EFFECT: enhanced accuracy.
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SU1783391A1 | |
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