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Preparation process of radioactive isotope cadmium-109

A radioactive isotope and preparation process technology, applied in the field of radioactive isotope preparation, can solve problems such as troublesome operation and long process, and achieve the effect of improving removal rate and simplifying operating procedures

Inactive Publication Date: 2002-03-27
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the operation is troublesome and the process is long, see figure 1

Method used

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  • Preparation process of radioactive isotope cadmium-109
  • Preparation process of radioactive isotope cadmium-109

Examples

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Effect test

example 1

[0028] Example 1: Adding divalent copper ions as a protective agent

[0029] like figure 2 As shown, take 1.1 grams of silver target, dissolve Ag target with 15mL, 5MOL / L nitric acid; heat at 90°C, evaporate to dryness; 2+ ) 200 mg, dissolve it; add 464mL, 8% hydrazine to reduce the silver target raw material solution with copper ions added above, the silver ions are reduced to obtain precipitated Ag; filter it; heat (90°C), evaporate the filtrate to dryness; use 20mL, 0.1 MOL / L HBr / 0.3 MOL / L HNO 3 Dissolve it, pass through 717 anion resin column; use 80Ml 0.1 MOL / L HBr / 0.3 MOL / L HNO 3 Wash away the unreduced Cu 2+ , and in the silver target 65 Zn 2+ and other impurities, cadmium-109 remains on the resin; finally use 45mL, 3MOL / L HNO 3 Elution of cadmium-109 from the resin. After measuring the precipitated silver, resin filtrate, eluted impurities and eluted resin, its 109 The radioactivity of Cd is almost zero, indicating that the yield of cadmium-109 is close to 100...

example 2

[0030] Example 2: Adding divalent cobalt ions as protective agent

[0031] Adding cobalt ions (Co 2+ ) amount is 180 mg, and other conditions are the same.

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Abstract

The preparation process of radioisotope cadmium-109 (109Cd) relates to the separation and purification process of radioisotope cadmium-109 produced by utilizing proton beam accelerated by cyclotron to bombard silver target. It is characterized by that according to the principle of oxidation-reduction potential firstly adding metal ion whose standard electrode potential value of greater than cadmium ion and less than silver ion as protecting agent of cadmium ion in the silver target dissolved liquor, then adding excess hydrazine hydrate to quantitatively reduce silver ion, and also partially reduce added protecting agent so as to make cadmium ion do not be reduced.

Description

1. Technical field [0001] The invention belongs to the field of radioisotope preparation, and in particular relates to a process for separating and purifying radioisotope cadmium-109 produced by cyclotron irradiation. 2. Background technology [0002] Cadmium-109 is a radioactive isotope with a wide range of uses. This isotope is bombarded by a cyclotron-accelerated proton beam on a silver target, producing 109 Ag(p,n) 109 Cd reacts to generate the isotope cadmium-109( 109 Cd) obtained. Therefore, how to separate and purify cadmium-109 from a large amount of silver target matrix is ​​the key to the production of this isotope. The method reported in the latest foreign literature is to use hydrazine to reduce the monovalent silver ion (Ag 1+ ), this method is more convenient and fast than some previous methods, but its difficulty is that the amount of hydrazine added is not easy to control. 2+ ) reduction, when the amount of hydrazine added is insufficient, the removal ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B17/00G21G1/10
Inventor 沈德恒王刚
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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