Analysis
Radioactive Isotopes
A variety of radioactive isotope systems are used in the environmental science:
| Isotop | Medium | Methode |
| 3H | water (H2O), methane (CH4) | LSC |
| 14C |
water (DIC, DOC), gas (CH4, CO2), biomass, food additives, alcoholic drinks, renewable resources (renewable proportion) |
LSC or Ams |
| 85Kr | water | low-level proportional counter |
| 39Ar | water | low-level proportional counter |
| 81Kr | water | ATTA |
| 36Cl | water | AMS |
| 222Rn |
water, soil gas, indoor air |
γ-spectrometry, dosimeter |
| 223Ra, 224Ra, 226Ra, 228Ra | water, solids | α- and γ-spectrometry as well as β-/γ-coincidence spectrometry |
| 210Pb | water, solids | LSC |
| 210Po | water, solids | α-spectrometry |
| 234U, 235U, 238U | water, solids | α- and γ-spectrometry, ICP-MS |
| 227Th, 228Th, 230Th, 232Th | water, solids | α- and γ-spectrometry , ICP-MS |
| 134Cs, 137Cs | water, solids, food | γ-spectrometry |
| 131I, 129I | water, solids, food | LSC |
| 86Sr/87Sr | water, solids, food | TIMS |
| 90Sr | water, solids, food | β-spectrometry |
| 40K, 60Co etc. | solids | γ-spectrometry |
Feel free to contact us for additional radioactive parameters.
The EU drinking water directive constitutes the evaluation of the radioactive load of water for human use by determining the total indicative dose. The limit of the total indicative dose is given as 0.1 mSv/a. The total dose comprises an evaluation of the yearly radiation dose which results from the consumption of the water.
Corresponding to the German drinking water directive the determination of total indicative dose is done using the measurement of the isotopes Radium-226, Radium-228, Uranium-234, Uranium-238, Lead-210, and Polonium-210.
Informationen about possibilities for the reduction of radioactive load in water can be found here.