METHOD FOR DETERMINING DEGREE OF TECHNOGENOUS SNOW COVER POLLUTION WITH HEAVY METALS OF IRON GROUP (COBALT, IRON, NICKEL) Russian patent published in 2001 - IPC

FIELD: environment control engineering. SUBSTANCE: method involves taking snow samples, melting them, filtering and drying. Solid residue is sieved to obtain fraction composed of particles of less than 1 mm limit size. The residue is placed in turn into a cell manufactured from non-magnetic material, set on magnetic susceptibility platform and measurements are done. The received values are marked on the map of territory under examination. Magnetic susceptibility isometric lines are built. Magnetic susceptibility values showing norm violation three times as large being found, the areas on the territory are marked as ones contaminated with heavy metals of iron group. EFFECT: accelerated method for revealing snow pollution in industrial areas and populated areas. 4 dwg