EJ/T 20057-2014 (English Version) PDF

Scope: This standard specifies the methods, procedures, results calculation, instruments and equipment, reagents and materials for measuring uranium concentration in gas sediments. This standard is applicable to the determination of dry deposition (fallen ash), wet deposition and uranium concentration in atmospheric fallout and precipitation. When the collection period of gas sedimentation ash and wet sedimentation is 30 days, and the area of the high tank bottom is 0.1m, the lower detection limit of this method is: the uranium concentration in sedimentation ash and filter residue is 0.18 μg/(d·m) (total mass of ash Calculated as 5g); the wet sedimentation filtrate is 0.1μg/(d·m) (the total volume of the filtrate is calculated as 2000mL); when the collection period of atmospheric precipitation is 24h, the area of the high tank bottom is 0.1m, and the total volume of precipitation is 2000mL, The lower detection limit of this method is: 3.0μg/(d·m).

EJ/T 20057-2014 history

2014 EJ/T 20057-2014 Determination of uranium concentration in atmospheric fallout.Liquid fluorometry by ultraviolet