The radioactivity of foodstuffs is monitored by the federal authorities and the cantonal laboratories. The most frequently used analytical methods are gamma spectrometry and analysis of tritium and strontium-90.
Step 1: Collection
3 to 5 liters of milk are collected from various farms or central dairies.
Step 2 : Conditioning
The milk is frozen and then lyophilized. This process produces powdered milk, concentrating most radionuclides in the dry matter and tritium in the extracted water.
Step 4 : Evaluation & publication
Results are evaluated, stored in the laboratory database and published on Radenviro.ch.
Step 3: Measurements
By means of gamma spectrometry, certain radioactive elements, such as cesium-137, iodine-131 or potassium-40, can be identified by measuring the energy of the gamma rays they emit. Tritium can be identified in the extracted water with liquid scintillation measurements, while the measurement of strontium-90 requires more complex techniques..
Step 1: Collection
3 to 5 liters of milk are collected from various farms or central dairies.
Step 2 : Conditioning
The milk is frozen and then lyophilized. This process produces powdered milk, concentrating most radionuclides in the dry matter and tritium in the extracted water.
Step 4 : Evaluation & publication
Results are evaluated, stored in the laboratory database and published on Radenviro.ch.
Step 3: Measurements
By means of gamma spectrometry, certain radioactive elements, such as cesium-137, iodine-131 or potassium-40, can be identified by measuring the energy of the gamma rays they emit. Tritium can be identified in the extracted water with liquid scintillation measurements, while the measurement of strontium-90 requires more complex techniques..
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