GB/T 5750.13-2006 Standard examination methods for drinking water—Radiological parameters

Scope

This standard specifies three methods for determining the total alpha radioactive volume activity of alpha-emitting radionuclides in drinking water and its source water. This method is applicable to the determination of the total alpha radioactive volume activity of alpha-emitting radionuclides (excluding volatile radionuclides under the conditions specified in this method) in drinking water and its source water. If drinking water contains 226Ra, the alpha-emitting daughter nuclide 222Rn generated during the burning of solid residues until the completion of the measurement of the sample source may interfere with the measurement results. By shortening the time of placing the solid residues after burning and making the sample source, the interference can be reduced; by regularly measuring the increase in the alpha radioactive activity of the solid residues with the increase in the placement time, this interference can be deducted. After expansion, this method can also be used to determine the total alpha radioactive volume activity of salt water and mineralized water, but the sensitivity has decreased. The detection limit of this method depends on various factors such as the amount of inorganic salts in the water sample, the counting efficiency of the counting measurement system, the background counting rate, and the counting time. Under typical conditions, the detection limit of this method is 1.6×10-2Bq/L.

Development Information

Same series standard

Replace the following standards

Superseded by the following standards

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