FIELD: sanitary; measurement technology; environment control. SUBSTANCE: method involves taking water samples from deep water cavities of Baikal lake in winter at a depth of 800-1200 m and taking ice samples in February-March period when it is sunny wether. Water samples are taken from the Central, Northern and Southern deep water cavities of Baikal lake. In taking water samples with continuous flow bathometer or after its having been done, water sample filtration is considered to be of use. Water filtration is to be carried out by means of silver or platinum filters. Magnetic treatment of water samples is also of use. Water samples are poured into vessels made of materials resistant to attack of chemical agents and the vessels are sealed in the fresh air or in air tight chambers. After being encapsulated in the chemically inert vessels, the water samples are exposed to ultra- violet, ultrasonic or radioactive radiation treatment. Before the samples being encapsulated, standard ingredients in predefined concentrations are introduced into the chemically inert vessels. EFFECT: enhanced accuracy in following potable water standards, when producing sweet water samples. 17 cl
