METHOD OF DETERMINING CRYSTALLISATION OF HEAVY ISOTOPE TYPES OF WATER Russian patent published in 2011 - IPC G01N33/18 G01N21/39 C02F1/22 

FIELD: chemistry.

SUBSTANCE: method of determining crystallisation of heavy isotope types of water during volumetric, uniform cooling of natural water and formation of ice of heavy water involves determining and recording changes in optical properties of water using a laser beam and two photocells. The photocells are placed at different heights and the laser beam and its scattered radiation are picked up. The laser beam is pulsed with pulse duration of up to 1 second and period between pulses of 30-200 seconds. Measurements are taken after lowering temperature of the processed water to +4°C. Before each measurement, the water aeration process is stopped completely or only on the area under the beam for the period of time when bubbles surface.

EFFECT: invention increases quality of water and preserves its salt composition.

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