Solutions of individual nuclides
Activity standards in the form of solutions are delivered in sealed Jena glass ampoules. They are 15.2 mm in diameter, about 60 mm in height, and their wall thickness is 0.5 mm. They normally contain 2 mL of the respective solution.
The chemical composition of the solution is selected such that its stability is guaranteed at a minimum concentration of solid matter and acid. When dilutions are prepared, in particular in glass jars, the concentration of the inactive carrier stated in the calibration certificate should at least be maintained to avoid wall adsorption of the radionuclide.
On request, solutions of lower specific activity can be prepared by dilution of the solutions available. The customer will be charged with the production costs of the solution.
At irregular intervals, activity standards of other nuclides than those stated in the Table "Activity standards in the form of solutions" can be delivered in the form of solutions.
Table 2: Activity standards in the form of solutions
Nuclide | Half- life | Chemical compo- sition of the solution | Specific Activity in kBq/g | Uncer- tainty in % (3) | Availa- bility |
H-3 | 12.33 a | H2O | 5 50;500 5000;50000 | 1.7 1.4 1.4 | ex stock |
Be-7 | 53.23 d | BeCl2 HCL 0.1 mol/L | 200;2000 | 1.4 | (2) |
C-14 | 5730 a | Na2CO3 NAOH 0.001 mol/L | 10;100 1000;10000 | 3.3 3.3 | ex stock |
Na-22 | 950.5 d | NaCl HCL 0.1 mol/L | 10 100;1000 | 1 0.7 | ex stock |
Cr-51 | 27.71 d | CrCl3 HCL 0.1 mol/L | 20 200;2000 | 1.4 1 | (1) |
Mn-54 | 312.15 d | MnCl2 HCL 0.1 mol/L | 10 100;1000 | 1 0.7 | ex stock |
Fe-55 | 1005 d | FeCl3 HCL 0.1 mol/L | 200;2000 | 2.5 | ex stock |
Co-57 | 271.83 d | CoCl2 HCL 0.1 mol/L | 20 200:2000 | 1.4 1 | ex stock |
Co-60 | 1925.3 d | CoCl2 HCL 0.1 mol/L | 4:40 400:4000 | 1 0.7 | ex stock |
Zn-65 | 243.94 d | ZnCl2 HCL 0.1 mol/L | 20 200;2000 | 1.4 1.4 | ex stock |
Sr-85 | 64.85 d | SrCl2 HCL 0.1 mol/L | 20 200;2000 | 1.4 1 | (2) |
Y-88 | 106.63 d | YCl3 HCL 0.1 mol/L | 10 100;1000 | 1.4 1 | (2) |
Sr-89 | 50.53 d | SrCl2 HCL 0.1 mol/L | 2;20 200;2000 | 2 1.7 | (1) |
Sr-90 | 28.81 a | SrCl2 + YCl3 HCL 0.1 mol/L | 0.4;4 40;400;4000 | 1.7 1.5 | ex stock |
Cd-109 | 462.1 d | CdCl2 HCL 0.1 mol/L | 10;100 1000 | 1.7 1.7 | ex stock |
Sb-125 | 1007.7 d | SbCl3 und Weinsäure HCL 2 mol/L | 10 100;1000 | 1.7 1.4 | ex stock |
I-125 | 59.39 d | NaI und Na2S2O3 mit 0.1 % Formalin | 10 100;1000 | 1.7 1.4 | (1) |
I-129 | 1.57*107 a | NaI und Na2S2O3 mit 0.1 % Formalin | 1 | 3.3 | ex stock |
I-131 | 8.021 d | NaI und Na2S2O3 mit 0.1 % Formalin | 4 1000 | 1 1.7 | March/ April |
Ba-133 | 10.54 a | BaCl2 HCL 0.1 mol/L | 0.4;4 40;400;1000 | 1.4 1 | ex stock |
Cs-134 | 754.0 d | CsCl HCL 0.1 mol/L | 10 100;1000 | 1 0.7 | ex stock |
Cs-137 | 30.13 a | CsCl HCL 0.1 mol/L | 0.4;4 40;400;4000 | 1.4 1 | ex stock |
Ce-139 | 137.66 d | CeCl3 HCL 1 mol/L | 10;100 1000 | 1 1 | (2) |
Ce-144 | 284.7 d | CeCl3 HCL 1 mol/L | 10;100 1000 | 1.4 1.4 | ex stock |
Pm-147 | 958.20 d | NdCl3 HCL 0.5 mol/L | 40;400 4000 | 2 2 | ex stock |
Eu-152 | 13.53 a | EuCl3 HCL 0.1 mol/L | 4 40;400;4000 | 2 1.4 | ex stock |
Tl-204 | 1381 a | Tl2SO4 HNO3 0.1 mol/L | 6 60;600 | 1.7 1.4 | ex stock |
Bi-207 | 31.55 a | BiCl3 HCL 1 mol/L | 15 | 1.5 | ex stock |
Pb-210 | 22.3 a | Pb(NO3)2 + Bi(NO3)3 HNO3 1.2 mol/L | 1.5 15;150;1500 | 2 1.5 | ex stock |
Ra-226 | 1600 a | BaCl2 HCL | 0.1;1 | 1.4 | ex stock |
Am-241 | 432,2 a | La(NO3)3 HNO3 0.1 mol/L | 1;4 10;400;4000 | 1.4 1 | ex stock |
(1) | The solutions are prepared and delivered yearly. The dates of delivery will be announced in good time. Please let us know about which deliveries you wish to be informed by sending us this form. Our contact details can be found under Order and contact. |
(2) | Raw solutions of this radionuclide are offered only rarely by the producers. The dates of delivery for activity standards are, therefore, undefined. |
(3) | The uncertainty stated is the relative expanded uncertainty of measurement in percent obtained by multiplying the standard uncertainty by a coverage factor k = 2. |