WO2022064812A1 - 放射性標識物の製造方法及び放射性標識物の製造装置並びに放射性金属核種の蒸発濃縮方法 - Google Patents
放射性標識物の製造方法及び放射性標識物の製造装置並びに放射性金属核種の蒸発濃縮方法 Download PDFInfo
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- 238000002372 labelling Methods 0.000 claims description 25
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- 238000011084 recovery Methods 0.000 claims description 7
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- SBHDKYTVDCRMOE-JPAPVDFESA-L copper;n'-methyl-n-[(e)-[(3e)-3-[(n-methyl-c-sulfidocarbonimidoyl)hydrazinylidene]butan-2-ylidene]amino]carbamimidothioate Chemical compound [Cu+2].CN=C([S-])N\N=C(/C)\C(\C)=N\NC([S-])=NC SBHDKYTVDCRMOE-JPAPVDFESA-L 0.000 description 6
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- SBHDKYTVDCRMOE-NLRRAJSESA-L copper-64(2+);n'-methyl-n-[(e)-[(3e)-3-[(n-methyl-c-sulfidocarbonimidoyl)hydrazinylidene]butan-2-ylidene]amino]carbamimidothioate Chemical compound [64Cu+2].CN=C([S-])N\N=C(/C)\C(\C)=N\NC([S-])=NC SBHDKYTVDCRMOE-NLRRAJSESA-L 0.000 description 1
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B59/00—Introduction of isotopes of elements into organic compounds ; Labelled organic compounds per se
- C07B59/004—Acyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/14—Evaporating with heated gases or vapours or liquids in contact with the liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/08—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in rotating vessels; Atomisation on rotating discs
- B01D3/085—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in rotating vessels; Atomisation on rotating discs using a rotary evaporator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/10—Vacuum distillation
- B01D3/106—Vacuum distillation with the use of a pump for creating vacuum and for removing the distillate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
- B01D3/36—Azeotropic distillation
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21G—CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
- G21G1/00—Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation or particle bombardment, e.g. producing radioactive isotopes
- G21G1/001—Recovery of specific isotopes from irradiated targets
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B2200/00—Indexing scheme relating to specific properties of organic compounds
- C07B2200/05—Isotopically modified compounds, e.g. labelled
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the present invention relates to a method for producing a radioactively labeled substance obtained by labeling a compound or the like with a radioactive metal nuclide, an apparatus for producing a radioactively labeled substance, and a method for evaporating and concentrating the radioactive metal nuclide.
- Beta ( ⁇ ) rays which are a type of radiation, have low material permeability, and therefore have the property of giving a large amount of energy per unit transit length.
- radiological therapeutic agents have been developed in which a radioactive metal nuclide that emits ⁇ -rays is bound to a compound having a property of gathering in cells at a diseased lesion site.
- a radiotherapy drug When a radiotherapy drug is administered into the body, it concentrates on the lesion site, and by emitting ⁇ -rays there, the cells in the lesion site are selectively destroyed to treat the disease.
- 64 Cu One of the radioactive metal nuclides that emit ⁇ rays is 64 Cu. Since 64 Cu emits special electrons (Auger electrons) that effectively damage cancer cell DNA in addition to ⁇ rays, it is expected to be used as a therapeutic drug for cancer.
- 64 Cu is produced by irradiating a target such as a gold plate plated with metallic nickel (Ni) with a proton beam to cause a nuclear reaction of 64 Ni (p, n) 64 Cu.
- the 64 Cu produced on the target is dissolved and recovered using an acidic solution such as hydrochloric acid or nitric acid. Since the recovered solution contains not only 64 Cu but also Ni and other products, it is necessary to separate and purify 64 Cu from these.
- the work of separating and purifying 64 Cu from a solution containing 64 Cu, Ni, etc. is performed by the following method. First, a solution containing 64 Cu, Ni, etc. is flowed through a column filled with an anion exchange resin, and 64 Cu in the solution is adsorbed on the anion exchange resin. Then, an acidic separation solution such as hydrochloric acid is flowed through the column to separate 64 Cu adsorbed on the anion exchange resin from the resin, and the 64 Cu is recovered together with the separation solution ( 64 Cu separation step).
- an acidic separation solution such as hydrochloric acid
- a separation solution containing 64 Cu is placed in a flask, and the flask is heated with a heater while rotating to evaporate the separation solution. As a result, the separation solution is concentrated and 64 Cu is precipitated ( 64 Cu concentration step).
- the 64 Cu obtained in the concentration step is dissolved in an appropriate solution and then mixed with a reaction solution containing the compound (therapeutic agent) to be labeled. As a result, 64 Cu and the compound are bound to obtain a radioactive therapeutic agent labeled with 64 Cu ( 64 Cu labeling step).
- Patent Document 1 proposes a series of operations from the above-mentioned 64 Cu separation step to the 64 Cu labeling step.
- manual radiation exposure of workers is unavoidable. Therefore, for some processes and some processes of each process, an apparatus for automatically executing these processes has been developed (Patent Document 1).
- each treatment in the 64 Cu separation step and the 64 Cu concentration step is executed in the state where the radioactive metal nuclide such as 64 Cu is dissolved in an acidic solution such as hydrochloric acid or nitric acid.
- an acidic solution such as hydrochloric acid or nitric acid.
- the reaction between 64 Cu contained in the recovered product and the labeled compound is carried out under neutral conditions, an appropriate solution is added to the recovered product to adjust the pH value before mixing with the reaction solution containing the labeled compound. Work to adjust is done.
- the pH value of the recovered product depends on the amount of the residual acid solution contained in the recovered product, but the amount of the residual acid solution varies depending on various factors. Further, since the amount of the recovered product is small, it is difficult to measure the pH value of the recovered product, and it is necessary for the operator to measure the pH value while adding the solution to the recovered product.
- the problem to be solved by the present invention is to separate the radioactive metal nuclide from the radioactive solution formed by dissolving the radioactive metal nuclide in an acidic aqueous solution and react it with the compound to be labeled to produce a radioactive labeled substance. It is to be able to do it without the help of.
- the first aspect of the present invention made to solve the above-mentioned problems is a method for evaporating and concentrating radioactive metal nuclides.
- the first evaporative concentration step of heating a radioactive solution formed by dissolving at least the radioactive metal nuclide in an acidic aqueous solution and evaporating the solvent in the radioactive solution to obtain a concentrated solution of the radioactive metal nuclide.
- a low boiling point organic solvent having a boiling point lower than that of water is added to the concentrated solution, and the mixture is heated to azeotrope the low boiling point organic solvent and the concentrated solution to obtain an evaporation concentrate of the radioactive metal nuclei. Process and It has.
- the radioactive solution when the radioactive solution is heated in the first evaporative concentration step, the water as the solvent in the radioactive solution mainly evaporates, and the concentrated solution having a higher dissolution concentration and acid concentration of the radioactive metal nuclei than the radioactive solution is produced. can get.
- the second evaporation concentration step when a low boiling point organic solvent is added to the concentrated solution and heated, the concentrated solution (concentrated acidic aqueous solution contained therein) and the low boiling point organic solvent azeotrope to the low boiling point organic solution.
- the solvent and acidic aqueous solution evaporate to obtain an evaporative concentrate of radioactive metal nuclei. Since the acidic aqueous solution contained in the concentrate evaporates, the evaporation concentrate tends to be more neutral than the concentrate.
- the low boiling point organic solvent is added to the concentrated liquid and heated, and then the same type or a different type of low boiling point organic solvent as the low boiling point organic solvent is added again and heated.
- the evaporative concentrate may be obtained. According to the above method, more acidic aqueous solution can be removed from the evaporation concentrate.
- an acidic aqueous solution containing one selected from evaporatively concentrating acids such as hydrochloric acid, nitric acid, and phosphoric acid can be used.
- the low boiling point organic solvent include ethanol (boiling point: about 78.5 ° C.), acetonitrile (boiling point: about 82 ° C.), acetone (boiling point: about 56 ° C.) and the like.
- the radioactive metal nuclei are selected from 61 Cu, 62 Cu, 64 Cu, 66 Cu, 67 Cu, 28 Mg, 43 Sc, and 68 Ga that are adsorbed on the ion exchange resin and can be eluted with an acidic eluate. It is a kind.
- a second aspect of the present invention which has been made to solve the above problems, is a method for producing a radioactively labeled substance obtained by labeling a compound with a radioactive metal nuclide.
- An adsorption step in which a radioactive solution prepared by dissolving a radioactive metal nuclei in an acidic solution is passed through an ion exchange resin to adsorb the radioactive metal nuclei on the ion exchange resin.
- An elution step in which an acidic eluate is flowed through the ion exchange resin and the radioactive metal nuclei adsorbed on the ion exchange resin are ion-exchanged with the eluate to be recovered as a radioactive solution.
- the radioactive solution recovered in the elution step is heated and the solvent in the radioactive solution is evaporated to obtain a concentrated solution of the radioactive metal nuclide.
- a low boiling point organic solvent having a boiling point lower than that of water is added to the concentrated solution, and the mixture is heated to azeotrope the low boiling point organic solvent and the concentrated solution to obtain an evaporation concentrate of the radioactive metal nuclei.
- Concentration process and It has a labeling step of reacting a radioactive metal nuclide contained in the evaporative concentrate with a compound to be labeled to obtain a radioactive labeled substance.
- the third aspect of the present invention made to solve the above-mentioned problems is an evaporation concentration device for radioactive metal nuclides.
- Concentration container and A heater that heats the concentrating container and An organic solvent tank for accommodating a low boiling point organic solvent having a boiling point lower than that of water, An introduction unit for introducing a low boiling point organic solvent contained in the organic solvent tank into the concentration container through an introduction path, and an introduction section.
- a temperature sensor that detects the temperature of the concentrating container and Equipped with a control unit The control unit drives the heater to heat the concentration container in a state where the radioactive solution in which the radioactive metal nuclei are dissolved in an acidic aqueous solution is contained in the concentration container, and the radioactive solution contains the radioactive solution.
- the heater is driven to heat the concentration container, and the concentrate and the low boiling point organic solvent are heated.
- a second evaporative concentration step of azeotropically boiling is configured to sequentially carry out a second evaporative concentration step of azeotropically boiling to obtain an evaporative concentrate of the radioactive metal nuclei.
- the fourth aspect of the present invention made to solve the above-mentioned problems is an apparatus for producing a radioactively labeled substance.
- a separation / recovery unit that separates the radioactive metal nuclei from the radioactive solution in which the radioactive metal nuclei and impurities are dissolved in an acidic solution and recovers the radioactive metal nuclei as a radioactive solution.
- An evaporative concentration unit that heats the radioactive solution recovered in the separation / recovery unit and evaporates the solvent in the radioactive solution to evaporate and concentrate the radioactive metal nuclide. It is provided with a labeling unit for producing a radioactively labeled substance by reacting the evaporatively concentrated radioactive metal nuclide with a compound to be labeled.
- the evaporative concentration section Concentration container and A heater that heats the concentrating container and An organic solvent tank for accommodating a low boiling point organic solvent having a boiling point lower than that of water, An introduction unit for introducing a low boiling point organic solvent in the organic solvent tank into the concentration container through an introduction path, and an introduction unit.
- a temperature sensor that detects the temperature of the concentrating container and Equipped with a control unit The control unit drives the heater to heat the concentration container in a state where the radioactive solution in which the radioactive metal nuclei are dissolved in an acidic aqueous solution is contained in the concentration container, and the radioactive solution contains the radioactive solution.
- the first evaporative concentration step of evaporating the solvent to obtain a concentrated solution of the radioactive metal nuclei.
- the heater After introducing the low boiling point organic solvent in the organic solvent tank into the introduction unit, the heater is driven to heat the concentration container, and the concentrate and the low boiling point organic solvent are heated. Is configured to carry out a second evaporative enrichment step of azeotropically boiling to obtain an evaporative concentrate of the radioactive metal nuclei.
- a low boiling organic solvent is added to the radioactive solution formed by dissolving the radioactive metal nuclei in an acidic aqueous solution and heated, so that the acidic aqueous solution contained in the radioactive solution is a low boiling organic. Removed by co-boiling with a solvent. Therefore, the evaporative concentrate of the radioactive metal nuclide becomes neutral. Therefore, unlike the conventional method, it is not necessary to neutralize the evaporation concentrate before reacting the radioactive metal nuclide with the compound to be labeled. Therefore, the radioactive metal nuclide is dissolved in an acidic aqueous solution such as hydrochloric acid.
- the work of recovering the radioactive metal nuclide from the solution and reacting it with the compound to be labeled to produce a radioactively labeled substance can be performed without human intervention.
- the figure which shows the schematic whole structure of the manufacturing system of the radioactive label which is one Embodiment of this invention.
- the figure which shows the whole structure of a melting apparatus The figure which shows the whole structure of the separation purification part.
- Schematic block block diagram of the manufacturing system The figure for demonstrating the operation flow of each part of a melting apparatus and a radioactive label manufacturing apparatus in a manufacturing system.
- FIG. 1 shows a schematic overall configuration of a radioactively labeled manufacturing system 100.
- the manufacturing system 100 includes a melting device 1, a radioactively labeled product manufacturing device 2, and a gas supply device 10, and the radioactively labeled product manufacturing device 2 includes a separation and purification unit 3, an evaporation concentration unit 4, and a labeling unit 5. is doing.
- the melting device 1, the radioactive label manufacturing device 2, and the gas supply device 10 are collectively arranged in one hot cell 6.
- FIG. 2 shows a schematic overall configuration of the melting device 1 and the gas supply device 10. As shown in FIGS. 1 and 2, the melting device 1 and the gas supply device 10 are arranged side by side in the hot cell 6.
- the dissolution device 1 has a dissolution tank 11, a dissolution liquid tank 14, a dilution water tank 12, and a washing water tank 13.
- the dissolution tank 11 is a tank for melting nickel plating (gold plate) in which 64 Cu is generated by irradiation with a proton beam to generate a radioactive dissolution liquid.
- the solution tank 14 contains an acidic solution such as a nitric acid solution or a hydrochloric acid solution.
- the solution containing the radioactive metal nuclei obtained in the dissolving apparatus 1, that is, the solution obtained by dissolving the raw metal in which the radioactive metal nuclei are produced in the acidic solution is referred to as a radioactive solution.
- the radioactive solution is a solution before the radioactive metal nuclide is separated by the separation and purification section described later.
- the diluting water tank 12 stores diluted water for adjusting the concentration (nitrite concentration, hydrochloric acid concentration) of the solution in addition to the radioactive solution generated in the solution tank 11.
- the washing water tank 13 stores washing water for washing the flow path R1 from the dissolving device 1 to the radioactive labeled product manufacturing device 2 (evaporation concentration unit 4).
- the gas supply device 10 has a nitrogen gas supply unit 101 and an air supply unit 102.
- the nitrogen gas supply unit 101 supplies nitrogen gas, which is an inert gas, to each unit of the melting device 1 and the radioactive labeled product manufacturing device 2 through the gas supply path G1.
- the air supply unit 102 supplies air to each unit of the melting device 1 and the radioactive labeled product manufacturing device 2 through the gas supply path G2.
- a valve is provided in the middle of the gas supply paths G1 and G2, and the supply destination of nitrogen gas and air can be switched by opening and closing the valve.
- FIG. 3 shows a schematic overall configuration of the separation / purification unit 3.
- the separation / purification unit 3 corresponds to the separation / recovery unit of the present invention.
- the separation / purification unit 3 includes a buffer tank 31, a column 32, a column washing water tank 33, a column washing liquid tank 34, a first eluent tank 35, a second eluent tank 36, and a third eluent tank 37. , Has a waste liquid tank 38.
- the inside of the column 32 is filled with an ion exchange resin for separating 64 Cu from Ni and other components.
- a flow path R1 is connected to the inlet of the buffer tank 31, and the radioactive dissolution liquid sent from the dissolution device 1 is introduced into the buffer tank 31.
- the radioactive dissolution liquid introduced into the buffer tank 31 is housed in the waste liquid tank 38 through a flow path formed by a tube pump (peristaltic pump) 321 and a column 32 and the like. In this process, Ni and other components and 64 Cu are adsorbed on the column 32.
- the discharge port of the tube pump 321 is connected to the evaporation concentration unit 4 via the flow path R2.
- a flow rate sensor 321 is provided in the flow path R1 near the inlet of the column 32, and a radioactivity (RI) sensor 322 is provided between the column 32 and the tube pump 323.
- the buffer tank 31 collects the washing water flowing from the washing water tank 13 for washing the melting tank 11 and the flow path R1 via the flow path R1.
- the first eluent tank 35 contains an eluate for 64 Cu elution.
- 64 The eluate for Cu elution consists of an acidic aqueous solution.
- the second and third eluate tanks 36 and 37 contain eluates for recovering Ni.
- the eluates contained in the second and third eluent tanks 36 and 37 may be the same or different.
- the eluate containing 64 Cu which is discharged from the column 32 by flowing the eluate for elution of 64 Cu through the column 32, is referred to as a radioactive solution.
- the solution containing the radioactive metal nuclide separated by the separation / purification unit 3 is referred to as a radioactive solution in distinction from the above-mentioned radioactive solution.
- the acidic aqueous solution used for eluting the radioactive metal nuclide in the separation and purification unit 3 is referred to as an acidic aqueous solution to distinguish it from the above-mentioned acidic solution.
- the column cleaning water tank 33 and the column cleaning liquid tank 34 store cleaning water and cleaning liquid for cleaning the ion exchange resin in the column 32, respectively.
- the waste liquid tank 38 is for recovering the washing water and the washing liquid, or the eluate containing Ni and the like, which has flowed through the column 32.
- FIG. 4 shows a schematic overall configuration of the evaporation concentration unit 4.
- the evaporation concentration unit 4 has an evaporator unit 41, an organic solvent tank 42, a syringe pump 43, a vacuum pump 44, and a Dewar bottle 45.
- the organic solvent tank 42 contains an organic solvent having a boiling point lower than that of water (low boiling point organic solvent).
- the syringe pump 43 supplies the low boiling point organic solvent contained in the syringe to the evaporator unit 41 by operating a syringe (not shown) mounted therein.
- the evaporator unit 41 includes a flask 411 which is a container for concentration, a heater 412 for heating the flask 411, and a rotary holder 413 for holding the flask 411.
- the flask 411 consists of an eggplant-shaped flask or a round-bottomed flask having a hemispherical bottom surface. The flask 411 held in the rotary holder 413 is rotated by the rotary holder 413.
- the mouth of the flask 411 is sealed with a lid 414.
- the lid 414 has a pressure reducing tube 415 for depressurizing the inside of the flask 411 and a pressure tube 416 for pressurizing the inside of the flask 411.
- the pressure reducing tube 415 is connected to the vacuum pump 44 via the Dewar bottle 45, and the pressure tube 416 is connected to the nitrogen gas supply unit 101 (see FIG. 2) through the gas flow path.
- the lid 414 has an introduction tube 417 and a lead-out tube 418.
- the introduction tube 417 is for introducing the radioactive solution sent from the separation / purification unit 3 and the low boiling point organic solvent supplied from the syringe pump 43 into the flask 411.
- the lead-out tube 418 is for leading out the contents in the flask 411 to the labeling unit 5.
- the flow path from the introduction tube 417 and the syringe pump 43 to the introduction tube 417, and the flow path from the organic solvent tank 42 to the flask 411 correspond to the introduction path of the present invention.
- the introduction path, the syringe pump 43, the vacuum pump 44, and the control unit 200 constitute the introduction unit.
- FIG. 5 shows a schematic overall configuration of the sign section 5.
- the labeling unit 5 has a reaction liquid tank 51, a dissolution liquid tank 52, and an additive liquid tank 53, and is arranged on the separation / purification unit 3 in the hot cell 6.
- the reaction solution tank 51 contains a reaction solution containing the compound to be labeled. Further, an appropriate dissolution liquid used for dissolving the radioactive metal nuclide is stored in the dissolution liquid tank 52, and the additive liquid tank 53 contains the additive necessary for the reaction between the radioactive metal nuclide and the compound. The liquid is stored.
- reaction liquid tank 51 the dissolution liquid tank 52, and the additive liquid tank 53 all use a container having a V-shaped cross section on the bottom surface. This is to make it easy to take out the entire amount of the liquid regardless of the amount of the liquid contained in each tank.
- the dissolution device 1, the separation / purification unit 3 of the radioactively labeled product manufacturing device 2, the evaporation concentration unit 4, and the labeling unit 5 include various liquids such as washing water and washing liquid in addition to the flow paths R1 to R3. It has a liquid flow path for flowing the gas, and a gas flow path for flowing nitrogen gas and air sent through the gas flow paths G1 and G2. A valve is provided in these liquid flow paths and gas flow paths, and the flow of liquid and gas can be switched by opening and closing the valves.
- FIG. 6 is a schematic block configuration diagram of the manufacturing system 100.
- the manufacturing system 100 includes a control unit 200, which includes a flow sensor 322, a temperature sensor 201, an RI sensor 323, a pressure sensor 202, a flow meter 203, a heater 412, and a tube.
- Pump 321, rotary holder 413, syringe pump 43, vacuum pump 44, gas supply device 10 (nitrogen gas supply unit 101, air supply unit 102), electromagnetic valve 204 for liquid flow path, electromagnetic valve 205 for gas flow path, And the operation unit 206 are connected.
- the temperature sensor 201 detects the temperature of the flask 411.
- the pressure sensor 202 detects the pressure of the gas supplied from the gas supply device 10.
- the control unit 200 Based on the signals input from the flow sensor 322, the temperature sensor 201, the RI sensor 323, the pressure sensor 202, and the flow meter 203, the control unit 200 has the heater 412, the tube pump 321 and the like according to a program stored in advance in the control unit 200. It controls the drive of the rotary holder 413, the syringe pump 43, the vacuum pump 44, the electromagnetic valve 204 for the liquid flow path, and the electromagnetic valve 205 for the gas flow path.
- a step of melting the nickel plating (gold plate) in which 64 Cu is generated by irradiation with a proton beam is executed.
- a nickel plating (gold plate) in which 64 Cu is generated is placed in the melting tank 11, and a predetermined amount of nitrogen gas is supplied from the nitrogen gas supply unit 10 to the dissolution liquid tank 14, and the dissolution liquid tank is used. It is started by pumping an acidic solution such as a nitrate solution or a hydrochloric acid solution in 14 to the dissolution tank 11.
- an acidic solution such as a nitrate solution or a hydrochloric acid solution in 14
- the control unit 200 controls the gas supply device 10 to supply the dissolution tank 11 with a predetermined amount of nitrogen gas from the nitrogen gas supply unit 101.
- the radioactive dissolution liquid in the dissolution tank 11 is pressure-fed to the buffer tank 31 of the separation / purification unit 3 through the flow path R1.
- the diluted water is pressure-fed from the dilution water tank 12 to the dissolution tank 11 in order to adjust the acid concentration of the radioactive dissolution liquid. You may do so.
- a step of separating / purifying 64 Cu from the radioactive solution is executed.
- 64 The Cu separation and purification step is started by introducing the radioactive dissolution liquid in the buffer tank 31 sent from the dissolution tank 11 into the column 32.
- the control unit 200 drives the tube pump 321.
- the radioactive solution introduced into the column 32 passes through the ion exchange resin, and at this time, 64 Cu and Ni existing as anions in the radioactive solution are adsorbed on the ion exchange resin ( 64 Cu adsorption step).
- control unit 200 controls the solenoid valves 204 and 205 to secure a flow path from the column cleaning water tank 33 to the waste liquid tank 38 via the column 32, and starts the tube pump 323 to start the column cleaning water tank 33 to the column.
- the washing water is sucked in and the column 32 is washed.
- a flow path from the column cleaning liquid tank 34 to the waste liquid tank 38 via the column 32 is secured, and the tube pump 323 is started to suck the column cleaning liquid from the column cleaning liquid tank 34 to remove impurities in the column 32.
- the tube pump 323 is started to use an acidic aqueous solution containing nitric acid, hydrochloric acid, etc. from the first eluent tank 35.
- a certain 64 Cu eluate for elution (hereinafter referred to as the first eluate) is sucked into the column 32.
- a hydrochloric acid solution having a pH of about 1 is used as the first eluate.
- ion exchange occurs and 64 Cu is eluted ( 64 Cu elution step).
- the control unit 200 controls the solenoid valve that switches to the flow path R2 to the evaporation concentration unit 4, and sends a radioactive solution containing 64 Cu to the evaporation concentration unit 4. Liquid.
- the tube pump 323 is stopped and the liquid feeding is terminated.
- control unit 200 controls the solenoid valves 204 and 205 to secure a flow path from the second eluent tank 36 to the waste liquid tank 38 via the column 32, and starts the tube pump 323.
- Ni in the column 32 is eluted and collected in the waste liquid tank 38.
- the number of times the eluate for Ni recovery is introduced into the column 32 is not limited to two times, and may be one time or three times or more.
- the evaporation concentration step of heating the radioactive solution to evaporate the solvent in the radioactive solution and concentrating 64 Cu is executed.
- the evaporation concentration step is started by introducing the radioactive solution sent from the separation / purification unit 3 through the flow path R2 into the flask 411 via the introduction tube 417.
- the control unit 200 drives the vacuum pump 44 to reduce the pressure in the flask 411. Further, the flask 411 is heated from the heater 412 and the rotary holder 413 is rotated.
- the radioactive solution in the flask 411 is heated in a state where the flask 411 is rotated, and the solvent (mainly the first eluate) contained in the radioactive solution evaporates. A part of the evaporated solvent is liquefied (condensed) in the upper part of the flask 411 and refluxed.
- 64 Cu of the radioactive solution is concentrated to obtain a concentrated solution ( 64 Cu first evaporation concentration step).
- 64 Cu first evaporation concentration step water and hydrochloric acid in the first eluate are refluxed in the same manner. Therefore, the hydrochloric acid concentration of the concentrated solution is almost the same as the hydrochloric acid concentration of the radioactive solution, and the concentrated solution becomes acidic.
- the control unit 200 stops the rotation of the rotary holder 413 and stops the heating by the heater 412. Then, when a predetermined time has elapsed (when the temperature of the concentrated solution becomes equal to or lower than a predetermined value), the vacuum pump 44 is driven to suck a predetermined amount of low boiling point organic solvent from the organic solvent tank 42 into the flask 411. Add to the concentrate of. Then, the flask 411 is heated again by the heater 412, and the rotary holder 413 is rotated. As a result, the concentrated solution in the flask 411 and the low boiling point organic solvent azeotrope, and the first eluate and the low boiling point organic solvent contained in the concentrated solution evaporate. As a result, 64 Cu, a small amount of the hydrochloric acid solution that did not evaporate, and the low boiling point organic solvent remain in the flask 411.
- the syringe pump 43 is then driven to add a predetermined amount of low boiling organic solvent to the residue in flask 411. Then, the flask 411 is heated again by the heater 412, and the rotary holder 413 is rotated. As a result, the first eluate contained in the residue and the low boiling point organic solvent azeotrope, and almost all of the small amount of eluate contained in the residue evaporates together with the low boiling point organic solvent.
- the control unit 200 stops the heater 412 when a predetermined time has elapsed from the start of heating by the heater 412. As a result, an evaporative concentrate of 64 Cu is produced in the flask 411 ( 64 Cu second evaporative concentration step).
- the evaporative concentrate of 64 Cu consists of a dry solid of 64 Cu or a mixture of a small amount of the first eluate and a low boiling organic solvent and 64 Cu. Whether it is a dry product or a mixture is determined by conditions such as the heating time by the heater 412 and the heating temperature, but in either case, the first eluate, which is an acidic aqueous solution, is not contained at all or is contained.
- the evaporative concentrate is in the neutral region, if at all.
- control unit 200 controls the solenoid valves 204 and 205 to secure a flow path from the dissolution liquid tank 52 of the labeling unit 5 to the flask 411 via the flow path R3, and drives the vacuum pump 44 to drive the flask.
- the entire amount of the solution in the solution tank 52 is sucked into the 411.
- the rotary holder 413 and the vacuum pump 44 are stopped.
- control unit 200 controls the solenoid valves 204 and 205 to secure a flow path from the flask 411 to the flow path R3, and the entire amount of the solution in the flask 511 is filled in the reaction tank of the labeling unit 5 through the flow path R3. Send to 51.
- a 64 Cu labeling step of reacting 64 Cu in the solution with the compound to be labeled to obtain a radioactively labeled substance is executed.
- the labeling step is started by introducing the dissolution liquid sent from the evaporation concentration unit 4 into the reaction liquid tank 51.
- the control unit 200 controls the gas supply device 10 to supply nitrogen gas from the nitrogen gas supply unit 101 to the additive liquid tank 53.
- the entire amount of the additive liquid contained in the additive liquid tank 53 is introduced into the reaction liquid tank 51.
- the reaction liquid tank 51, the dissolution liquid tank 52, and the additive liquid tank 53 contain in advance an amount of the reaction liquid, the dissolution liquid, and the additive liquid necessary for the reaction between 64 Cu and the compound to be labeled. Therefore, in the reaction liquid tank 51, the reaction between 64 Cu and the compound to be labeled proceeds at an accurate liquid volume, and a radioactively labeled substance is produced.
- 64 Cu-ATSM 64 Cu-diacetyl-bis (N 4 -methylthiosemicarbazone)] as a radioactive label is manufactured using the manufacturing system 100 of the above embodiment.
- 64 Cu-ATSM is a radioactive therapeutic agent developed for the treatment of malignant brain tumors.
- the melting device 1 and the hot cell 6 used products manufactured by Sumitomo Heavy Industries, Ltd. Further, as the ion exchange resin to be filled in the column 32, a cationic resin (AG 50W-X8 100-200 H + manufactured by Bio-Rad Laboratories Co., Ltd.) was used. Then, the melting device 1, the radioactively labeled product manufacturing device 2, and the gas supply device 10 are connected by a flow path, and are provided in the melting device 1, the radioactively labeled product manufacturing device 2, the gas supply device 10, and each flow path. By centrally controlling the valve with one control system, all the steps from 64 Cu melting step to 64 Cu separation and purification step, 64 Cu evaporative concentration step, and 64 Cu labeling step were automatically executed.
- a cationic resin AG 50W-X8 100-200 H + manufactured by Bio-Rad Laboratories Co., Ltd.
- the amount of the radioactive solution introduced into the flask 411 from the separation / purification unit 3 in the evaporation concentration step is 60 mL, and this radioactive solution is heated by using the evaporator unit 41 to carry out the evaporation concentration step.
- the desired evaporative concentrate could be obtained 30 minutes after the start.
- the method of the present invention in which ethanol (low boiling point organic solvent) is added to the concentrate in the step of evaporating and concentrating 64 Cu takes 1/3 of the time to obtain the evaporative concentrate as compared with the conventional method.
- this evaporative concentrate in the neutral region can be obtained in the 64 Cu evaporative concentration step, this evaporative concentrate can be used in the 64 Cu labeling step without the intervention of an operator. It turned out that it can be migrated to. Therefore, by using the evaporative concentration method of the present invention, all the steps from the 64 Cu melting step to the 64 Cu labeling step can be automated in the production of the radioactively labeled product.
- the amount of radiation exposed to workers can be significantly reduced (according to the experiments of the present inventor, it could be reduced to about 1/5), and the radiopharmaceuticals and the like are radioactive. It is possible to stably and mass-produce labeled products.
- a low boiling point organic solvent is added to the flask 411 to azeotrope with the first eluate.
- the process of allowing the sample to evaporate was performed twice, but in some cases, the azeotropic treatment may be performed once.
- the mixture is concentrated by one azeotropic treatment. Almost all of the first eluate contained in the liquid can be evaporated to obtain an evaporative concentrate in the neutral region.
- the present invention relates to the radioactive metal nuclide that is processed in a state of being dissolved in an acidic aqueous solution and adsorbed on an ion exchange resin. Evaporation concentration methods can be applied.
- radioactive metal nuclides include 61 Cu, 62 Cu, 64 Cu, 66 Cu, 67 Cu, 28 Mg, 43 Sc, and 68 Ga.
- the acidic aqueous solution in which the radioactive metal nuclide is dissolved is selected according to the type of the radioactive metal nuclide, and hydrochloric acid, nitric acid, and phosphoric acid are exemplified.
- ethanol is used as the low boiling point organic solvent, but the present invention is not limited to this, and any solvent having a boiling point lower than that of water such as acetonitrile and acetone can be used.
- the low boiling point organic solvent one kind of organic solvent may be used, or a mixed solvent composed of a plurality of kinds of organic solvents may be used.
- Heater 413 ... Rotary holder 414 ... Lid 415 ... Decompression tube 416 ... Pressurized tube 417 ... Introduction tube 418 ... Derivation Tube 42 ... Organic solvent tank 43 ... Syringe pump 44 ... Vacuum pump 45 ... Dewar bottle 5 ... Labeling part 51 ... Reaction liquid tank 52 ... Dissolution tank 53 ... Additive liquid tank 6 ... Hot cell
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Abstract
Description
まず、64Cu、Ni等を含む溶解液をアニオン交換樹脂が充填されたカラムに流し、溶解液中の64Cuをアニオン交換樹脂に吸着させる。その後、カラムに塩酸等の酸性の分離溶液を流してアニオン交換樹脂に吸着している64Cuを該樹脂から離脱させ、分離溶液とともに回収する(64Cu分離工程)。
濃縮工程で得られた64Cuは適宜の溶解液に溶解された後、標識対象の化合物(治療薬)を含む反応液と混合される。これにより、64Cuと化合物が結合し、64Cuで標識された放射性治療薬が得られる(64Cu標識工程)。
少なくとも放射性金属核種が酸性水溶液に溶解して成る放射性溶液を加熱し、該放射性溶液中の溶媒を蒸発させて、前記放射性金属核種の濃縮液を得る、第1蒸発濃縮工程と、
前記濃縮液に、水よりも沸点の低い低沸点有機溶媒を加え、加熱して前記低沸点有機溶媒と前記濃縮液を共沸させ、前記放射性金属核種の蒸発濃縮物を得る、第2蒸発濃縮工程と、
を有するものである。
前記第2蒸発濃縮工程が、前記濃縮液に前記低沸点有機溶媒を加え、加熱した後、再度、前記低沸点有機溶媒と同じ種類又は異なる種類の低沸点有機溶媒を加え、加熱することにより、前記蒸発濃縮物を得るようにしても良い。
上記方法によれば、蒸発濃縮物からより多くの酸性水溶液を除去することができる。
また、前記低沸点有機溶媒としては、エタノール(沸点:約78.5℃)、アセトニトリル(沸点:約82℃)、アセトン(沸点:約56℃)等が挙げられる。
また、前記放射性金属核種は、イオン交換樹脂に吸着し酸性の溶出液で溶出可能な61Cu、62Cu、64Cu、66Cu、67Cu、28Mg、43Sc、及び68Gaから選択される一種である。
放射性金属核種が酸性の溶解液に溶解されて成る放射性溶解液を、イオン交換樹脂に通して前記放射性金属核種を前記イオン交換樹脂に吸着させる吸着工程と、
前記イオン交換樹脂に酸性の溶出液を流して、前記イオン交換樹脂に吸着している前記放射性金属核種を前記溶出液とイオン交換することで、放射性溶液として回収する溶出工程と、
前記溶出工程で回収された放射性溶液を加熱し、前記放射性溶液中の溶媒を蒸発させて、前記放射性金属核種の濃縮液を得る、第1蒸発濃縮工程と、
前記濃縮液に、水よりも沸点の低い低沸点有機溶媒を加え、加熱して前記低沸点有機溶媒と前記濃縮液を共沸させて、前記放射性金属核種の蒸発濃縮物を得る、第2蒸発濃縮工程と、
前記蒸発濃縮物に含まれる放射性金属核種と標識対象化合物とを反応させて放射性標識物を得る標識工程と
を有するものである。
濃縮用容器と、
前記濃縮用容器を加熱するヒータと、
水よりも沸点の低い低沸点有機溶媒を収容するための有機溶媒槽と、
前記有機溶媒槽内に収容されている低沸点有機溶媒を導入路を通して前記濃縮用容器に導入する導入部と、
前記濃縮用容器の温度を検出する温度センサと、
制御部とを備え、
前記制御部が、前記濃縮用容器内に放射性金属核種が酸性水溶液に溶解して成る放射性溶液が収容されている状態で前記ヒータを駆動して前記濃縮用容器を加熱し、前記放射性溶液に含まれる溶媒を蒸発させて前記放射性金属核種の濃縮液を得る第1蒸発濃縮工程と、
前記導入部に、前記有機溶媒槽内の前記低沸点有機溶媒を前記濃縮用容器に導入させた後、前記ヒータを駆動して前記濃縮用容器を加熱し、前記濃縮液と前記低沸点有機溶媒を共沸させて前記放射性金属核種の蒸発濃縮物を得る、第2蒸発濃縮工程とを
順に実行するように構成されているものである。
放射性金属核種及び不純物が酸性の溶解液に溶解されて成る放射性溶解液から前記放射性金属核種を分離し、放射性溶液として回収する分離回収部と、
前記分離回収部で回収された前記放射性溶液を加熱し、前記放射性溶液中の溶媒を蒸発させることにより放射性金属核種を蒸発濃縮する蒸発濃縮部と、
前記蒸発濃縮された放射性金属核種を、標識対象化合物と反応させて放射性標識物を製造する標識部とを備え、
前記蒸発濃縮部が、
濃縮用容器と、
前記濃縮用容器を加熱するヒータと、
水よりも沸点の低い低沸点有機溶媒を収容するための有機溶媒槽と、
前記有機溶媒槽内の低沸点有機溶媒を導入路を通して前記濃縮用容器に導入する導入部と、
前記濃縮用容器の温度を検出する温度センサと、
制御部とを備え、
前記制御部が、前記濃縮用容器内に放射性金属核種が酸性水溶液に溶解して成る放射性溶液が収容されている状態で前記ヒータを駆動して前記濃縮用容器を加熱し、前記放射性溶液に含まれる溶媒を蒸発させて前記放射性金属核種の濃縮液を得る第1蒸発濃縮工程と、
前記導入部に、前記有機溶媒槽内の前記低沸点有機溶媒を前記濃縮用容器に導入させた後、前記ヒータを駆動して前記濃縮用容器を加熱し、前記濃縮液と前記低沸点有機溶媒を共沸させて前記放射性金属核種の蒸発濃縮物を得る、第2蒸発濃縮工程とを
実行するように構成されているものである。
図1は、放射性標識物の製造システム100の概略的な全体構成を示している。ここでは、放射性標識物として、放射性金属核種の一つである64Cuで化合物を標識して成る放射性標識物を例に挙げて説明する。
製造システム100は、溶解装置1、放射性標識物製造装置2、及びガス供給装置10を備えており、前記放射性標識物製造装置2は、分離精製部3、蒸発濃縮部4、標識部5を有している。これら溶解装置1、放射性標識物製造装置2、ガス供給装置10は、まとめて一つのホットセル6内に配置されている。
第1溶出液槽35には64Cu溶出用の溶出液が収容されている。64Cu溶出用の溶出液は酸性の水溶液から成る。また、第2及び第3溶出液槽36、37にはNi回収用の溶出液が収容されている。第2及び第3溶出液槽36、37に収容されている溶出液は同じでも良く、異なるものでもよい。なお、以下の説明では、64Cu溶出用の溶出液がカラム32に流されることにより該カラム32から排出される、64Cuを含んだ溶出液を放射性溶液という。即ち、分離精製部3にて分離された放射性金属核種を含む溶液を、前述の放射性溶解液と区別して放射性溶液という。また、以下の説明では、分離精製部3にて放射性金属核種を溶出するために用いられる酸性の水溶液を、前述の酸性の溶解液と区別して酸性水溶液という。
次に、図7を参照して、上述した製造システム100における溶解装置1及び放射性標識物製造装置2の各部のそれぞれの動作を概略的に説明する。
次に、上記実施形態の製造システム100を用いて放射性標識物としての64Cu-ATSM[64Cu-diacetyl-bis (N4-methylthiosemicarbazone)]を製造した実施例について説明する。64Cu-ATSMは、悪性脳腫瘍の治療を目的として開発された放射性治療薬である。
また、本実施例では、蒸発濃縮工程において、分離精製部3からフラスコ411に導入された放射性溶液は60mLであり、この放射性溶液は、エバポレータユニット41を用いて加熱することにより、蒸発濃縮工程を開始してから30分で所期の蒸発濃縮物を得ることができた。
なお、濃縮液に10mLのエタノールを加えて加熱する処理を1回だけ行った場合、この処理は2分で終了したが、得られた蒸発濃縮物のpHは3であり、依然として酸性であった。
したがって、本発明の蒸発濃縮方法を用いることにより、放射性標識物を製造する際において、64Cu溶解工程から64Cu標識工程までの全ての工程を自動化することができる。また、全工程を自動化することにより、作業者の被爆量を大幅に低減することができる(本発明者の実験によると1/5程度まで低減することができた)とともに、放射性医薬品等の放射性標識物を安定的に且つ大量生産に対応することが可能となる。
また、上記実施形態では、低沸点有機溶媒としてエタノールを用いたが、これに限らず、アセトニトリル、アセトン等の水よりも沸点の低い溶媒であれば使用することができる。また、低沸点有機溶媒として、一種類の有機溶媒を用いても良く、複数種の有機溶媒から成る混合溶媒を用いても良い。
1…溶解装置
10…ガス供給装置
101…窒素ガス供給部
102…空気供給部
11…溶解槽
12…希釈水槽
13…洗浄水槽
14…溶解液槽
2…放射性標識物製造装置
3…分離精製部
31…バッファタンク
32…カラム
32…該カラム
321…流量センサ
322…RIセンサ
323…チューブポンプ
33…カラム洗浄水槽
34…カラム洗浄液槽
35…第1溶出液槽
36…第2溶出液槽
37…第3溶出液槽
38…廃液タンク
4…蒸発濃縮部
41…エバポレータユニット
411…フラスコ
412…ヒータ
413…ロータリホルダ
414…蓋体
415…減圧チューブ
416…加圧チューブ
417…導入チューブ
418…導出チューブ
42…有機溶媒槽
43…シリンジポンプ
44…真空ポンプ
45…デュワー瓶
5…標識部
51…反応液槽
52…溶解液槽
53…添加剤液槽
6…ホットセル
Claims (9)
- 少なくとも放射性金属核種が酸性水溶液に溶解して成る放射性溶液を加熱し、該放射性溶液中の溶媒を蒸発させて、前記放射性金属核種の濃縮液を得る、第1蒸発濃縮工程と、
前記濃縮液に、水よりも沸点の低い低沸点有機溶媒を加え、加熱して前記低沸点有機溶媒と前記濃縮液を共沸させ、前記放射性金属核種の蒸発濃縮物を得る、第2蒸発濃縮工程と、
を有する、放射性金属核種の蒸発濃縮方法。 - 請求項1に記載の放射性金属核種の蒸発濃縮方法において、
前記第2蒸発濃縮工程が、前記濃縮液に前記低沸点有機溶媒を加え、加熱した後、再度、前記低沸点有機溶媒と同じ種類又は異なる種類の低沸点有機溶媒を加え、加熱することにより、前記蒸発濃縮物を得る、放射性金属核種の蒸発濃縮方法。 - 請求項1又は2に記載の放射性金属核種の蒸発濃縮方法において、
前記酸性水溶液が塩酸、硝酸、りん酸から選ばれる一種を含む、放射性金属核種の蒸発濃縮方法。 - 請求項1~3のいずれかに記載の放射性金属核種の蒸発濃縮方法において、
前記低沸点有機溶媒が、エタノール、アセトニトリル、アセトンから選択される一種の溶媒または複数種の混合溶媒である、放射性金属核種の蒸発濃縮方法。 - 請求項1に記載の放射性金属核種の蒸発濃縮方法において、
前記放射性金属核種が、イオン交換樹脂に吸着し酸性の溶出液で溶出可能な61Cu、62Cu、64Cu、66Cu、67Cu、28Mg、43Sc、及び68Gaから選択される一種である、放射性金属核種の蒸発濃縮方法。 - 化合物を放射性金属核種で標識して成る放射性標識物を製造する方法であって、
放射性金属核種が酸性の溶解液に溶解されて成る放射性溶解液を、イオン交換樹脂に通して前記放射性金属核種を前記イオン交換樹脂に吸着させる吸着工程と、
前記イオン交換樹脂に酸性の溶出液を流して、前記イオン交換樹脂に吸着している前記放射性金属核種を前記溶出液とイオン交換することで、放射性溶液として回収する溶出工程と、
前記溶出工程で回収された放射性溶液を加熱し、前記放射性溶液中の溶媒を蒸発させて、前記放射性金属核種の濃縮液を得る、第1蒸発濃縮工程と、
前記濃縮液に、水よりも沸点の低い低沸点有機溶媒を加え、加熱して前記低沸点有機溶媒と前記濃縮液を共沸させて、前記放射性金属核種の蒸発濃縮物を得る、第2蒸発濃縮工程と、
前記蒸発濃縮物に含まれる放射性金属核種と標識対象化合物とを反応させて放射性標識物を得る標識工程と
を有する、放射性標識物の製造方法。 - 濃縮用容器と、
前記濃縮用容器を加熱するヒータと、
水よりも沸点の低い低沸点有機溶媒を収容するための有機溶媒槽と、
前記有機溶媒槽内に収容されている低沸点有機溶媒を導入路を通して前記濃縮用容器に導入する導入部と、
前記濃縮用容器の温度を検出する温度センサと、
制御部とを備え、
前記制御部が、前記濃縮用容器内に放射性金属核種が酸性水溶液に溶解して成る放射性溶液が収容されている状態で前記ヒータを駆動して前記濃縮用容器を加熱し、前記放射性溶液に含まれる溶媒を蒸発させて前記放射性金属核種の濃縮液を得る第1蒸発濃縮工程と、
前記導入部に、前記有機溶媒槽内の前記低沸点有機溶媒を前記濃縮用容器に導入させた後、前記ヒータを駆動して前記濃縮用容器を加熱し、前記濃縮液と前記低沸点有機溶媒を共沸させて前記放射性金属核種の蒸発濃縮物を得る、第2蒸発濃縮工程とを
順に実行するように構成されている、放射性金属核種の蒸発濃縮装置。 - 放射性金属核種及び不純物が酸性の溶解液に溶解されて成る放射性溶解液から前記放射性金属核種を分離し、放射性溶液として回収する分離回収部と、
前記分離回収部で回収された前記放射性溶液を加熱し、前記放射性溶液中の溶媒を蒸発させることにより放射性金属核種を蒸発濃縮する蒸発濃縮部と、
前記蒸発濃縮された放射性金属核種を、標識対象化合物と反応させて放射性標識物を製造する標識部とを備え、
前記蒸発濃縮部が、
濃縮用容器と、
前記濃縮用容器を加熱するヒータと、
水よりも沸点の低い低沸点有機溶媒を収容するための有機溶媒槽と、
前記有機溶媒槽内の低沸点有機溶媒を導入路を通して前記濃縮用容器に導入する導入部と、
前記濃縮用容器の温度を検出する温度センサと、
制御部とを備え、
前記制御部が、前記濃縮用容器内に放射性金属核種が酸性水溶液に溶解して成る放射性溶液が収容されている状態で前記ヒータを駆動して前記濃縮用容器を加熱し、前記放射性溶液に含まれる溶媒を蒸発させて前記放射性金属核種の濃縮液を得る第1蒸発濃縮工程と、
前記導入部に、前記有機溶媒槽内の前記低沸点有機溶媒を前記濃縮用容器に導入させた後、前記ヒータを駆動して前記濃縮用容器を加熱し、前記濃縮液と前記低沸点有機溶媒を共沸させて前記放射性金属核種の蒸発濃縮物を得る、第2蒸発濃縮工程とを
実行するように構成されている、放射性標識物製造装置。 - 請求項8に記載の放射性標識物製造装置において、
前記標識部が、断面V字状の底面を有する反応液槽を備える、放射性標識物製造装置。
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