CN110917658B - Automatic strontium-90 discharging and separating device - Google Patents
Automatic strontium-90 discharging and separating device Download PDFInfo
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- CN110917658B CN110917658B CN201911033173.2A CN201911033173A CN110917658B CN 110917658 B CN110917658 B CN 110917658B CN 201911033173 A CN201911033173 A CN 201911033173A CN 110917658 B CN110917658 B CN 110917658B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/10—Selective adsorption, e.g. chromatography characterised by constructional or operational features
- B01D15/22—Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the construction of the column
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/10—Selective adsorption, e.g. chromatography characterised by constructional or operational features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/42—Selective adsorption, e.g. chromatography characterised by the development mode, e.g. by displacement or by elution
- B01D15/424—Elution mode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D59/00—Separation of different isotopes of the same chemical element
- B01D59/22—Separation by extracting
- B01D59/26—Separation by extracting by sorption, i.e. absorption, adsorption, persorption
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/405—Concentrating samples by adsorption or absorption
Abstract
The invention discloses an automatic strontium-90 radiochemical separation device. The device includes: a plurality of crown ether extraction chromatographic columns; a plurality of reservoirs comprising at least one balance reservoir, at least one eluent reservoir, and at least one waste reservoir; the multi-channel switching valve is provided with a main port, a sample inlet branch port, a plurality of chromatographic column branch ports and a plurality of liquid storage bottle branch ports, each chromatographic column branch port is connected with one crown ether extraction chromatographic column, and each liquid storage bottle branch port is connected with one liquid storage bottle; and one end of the reciprocating metering pump is connected with the main port. The device can realize the automatic radiochemical separation of strontium-90, obviously shorten the radiochemical separation time of a sample, and has high and stable strontium-90 recovery rate.
Description
Technical Field
The invention relates to the technical field of radioisotope separation, in particular to a strontium-90 automatic radiochemical separation device.
Background
Strontium-90 (C)90Sr) is a gamma-ray-free beta-decay radionuclide, which is measured at times by measuring strontium-90 or its decay daughter yttrium-90 ((II)90Y), the beta ray is a continuous spectrum and can be interfered by beta rays of other radionuclides during measurement. Therefore, in the measurement of strontium-90 in the environmental water, the sample needs to be subjected to radiochemical separation to remove other radionuclides in the sample and prepare the sample only containing strontium-90.
At present, the strontium-90 radiochemical separation in domestic environmental water mainly adopts a laboratory manual analysis method. The method has the problems of high requirement on operators, insufficient manual analysis professionals, low monitoring frequency on the strontium-90 in the environmental water and the like. At present, no automatic environmental water strontium-90 radiochemical separation system or method exists, and the most common manual radiochemical separation method is a fuming nitric acid method, an HDEHP extraction chromatography method and a crown ether extraction chromatography method. Crown ether chromatography uses crown ether resin as stationary phase and sample as mobile phase. Adsorbing strontium ions in the sample by using a resin through adsorbing the strontium ions by using crown ether (such as DCH18C6) in a high-concentration nitric acid environment, and extracting strontium-90 in the sample to a stationary phase to be separated from other radionuclides in a mobile phase. And (3) eluting strontium-90 adsorbed in the stationary phase into the sample by using low-concentration nitric acid or deionized water by utilizing the property that the strontium ion adsorption capacity of the crown ether is weakened in the low-concentration nitric acid environment.
The existing crown ether chromatographic extraction method needs manual analysis and is difficult to realize automation. The automation difficulty mainly comprises the following points: 1. crown ether chromatography requires switching of various reagents in the automation process, which can cause mutual contamination of the reagents. 2. Crown ether is lost after the crown ether extraction chromatographic resin is used for many times, so that the adsorption capacity of strontium-90 is weakened, and the long-term stable operation of an automatic system is not facilitated. 3. There is a need in automated radioactive separation to prevent the injection of bubbles into the column of the chromatographic column. In addition, the sample prepared by the existing crown ether extraction method can be measured only by drying treatment, and the step has the disadvantages of more accurate operation of operators, longer time consumption and difficult automation. If the liquid scintillator detector is used for measurement, the detection efficiency is reduced due to higher sample acidity, the phenomenon of quenching delamination occurs, and the measurement effect is poor.
In summary, the existing strontium-90 release separation means still needs to be improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to provide an automatic strontium-90 radiochemical separation apparatus. The device can realize the automatic radiochemical separation of strontium-90, obviously shorten the radiochemical separation time of a sample, and has high and stable strontium-90 recovery rate.
In one aspect of the invention, the invention provides a strontium-90 automatic radiochemical separation device. According to an embodiment of the invention, the apparatus comprises: a plurality of crown ether extraction chromatographic columns; a plurality of reservoirs comprising at least one balance reservoir, at least one eluent reservoir, and at least one waste reservoir; the multi-channel switching valve is provided with a main port, a sample inlet branch port, a plurality of chromatographic column branch ports and a plurality of liquid storage bottle branch ports, each chromatographic column branch port is connected with one crown ether extraction chromatographic column, and each liquid storage bottle branch port is connected with one liquid storage bottle; and one end of the reciprocating metering pump is connected with the main port.
According to the strontium-90 automatic release separation device provided by the embodiment of the invention, the balancing, sample feeding, leaching and eluting operations of the crown ether extraction chromatographic column can be automatically completed by utilizing the reciprocating metering pump through the switching of the multi-channel switching valve, so that the automatic release separation of the strontium-90 is realized. Compared with the existing separation method, the device can obviously shorten the sample radiochemical separation time, the strontium-90 recovery rate is high and stable, and the separated sample can be directly measured by a liquid scintillator detector. In addition, the device can also effectively prolong the period of equipment maintenance and consumable replacement by adopting a plurality of color layer columns to be used in parallel.
In addition, the automatic strontium-90 discharge separation device according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the invention, the crown ether extraction chromatography column has a sample inlet and a flow outlet; the sample inlet is connected with the branch port of the chromatographic column, and a manual needle valve is arranged between the sample inlet and the branch port; the outflow port is connected with a waste liquid bottle and a liquid flash bottle, a first electromagnetic valve is arranged between the waste liquid bottle and the outflow port, and a second electromagnetic valve is arranged between the liquid flash bottle and the outflow port.
In some embodiments of the invention, the equilibrium liquid storage bottle contains concentrated nitric acid.
In some embodiments of the invention, the leacheate storage bottle contains leacheate, and the leacheate is nitric acid with the concentration of 1-8 mol/L.
In some embodiments of the invention, the eluent reservoir bottle contains water.
In some embodiments of the invention, the eluent reservoir bottle contains deionized water.
In some embodiments of the present invention, bubble sensors are disposed between the reciprocating metering pump and the main port and at the sample inlet branch.
In some embodiments of the present invention, the other end of the reciprocating metering pump is connected to the eluent storage bottle, and a third electromagnetic valve and a bubble sensor are arranged between the eluent storage bottle and the reciprocating metering pump.
In some embodiments of the invention, the main port and the reciprocating metering pump, the branch port of the chromatographic column and the crown ether extraction chromatographic column, and the branch port of the liquid storage bottle and the liquid storage bottle are connected through polytetrafluoroethylene tubes.
In some embodiments of the present invention, the strontium-90 automatic radiochemical separation apparatus further comprises: and the control system is connected with the multi-channel switching valve, the reciprocating metering pump, the first electromagnetic valve and the second electromagnetic valve.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of an automatic strontium-90 radiochemical separation apparatus according to one embodiment of the present invention;
FIG. 2 is a schematic structural view of an automatic strontium-90 radiochemical separation apparatus according to yet another embodiment of the present invention;
FIG. 3 is a schematic structural view from another perspective of an automatic strontium-90 radiocontraction separation apparatus according to yet another embodiment of the present invention;
FIG. 4 is a schematic structural view from another perspective of an automatic strontium-90 radiocontraction separation apparatus according to yet another embodiment of the present invention;
FIG. 5 is a schematic structural view from another perspective of an automatic strontium-90 radiocontraction separation apparatus according to yet another embodiment of the present invention;
fig. 6 is a schematic structural view of another perspective of an automatic strontium-90 radiocontraction separation apparatus according to still another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In one aspect of the invention, the invention provides a strontium-90 automatic radiochemical separation device. According to an embodiment of the invention, the apparatus comprises: a plurality of crown ether extraction chromatographic columns, a plurality of liquid storage bottles, a multi-channel switching valve and a reciprocating metering pump. Wherein the plurality of liquid storage bottles comprise at least one balance liquid storage bottle, at least one eluent storage bottle and at least one waste liquid storage bottle; the multi-channel switching valve is provided with a main port, a sample injection branch port, a plurality of chromatographic column branch ports and a plurality of liquid storage bottle branch ports, each chromatographic column branch port is connected with a crown ether extraction chromatographic column, and each liquid storage bottle branch port is connected with a liquid storage bottle; one end of the reciprocating metering pump is connected with a main port of the multi-channel switching valve.
According to the strontium-90 automatic release separation device provided by the embodiment of the invention, the balancing, sample feeding, leaching and eluting operations of the crown ether extraction chromatographic column can be automatically completed by utilizing the reciprocating metering pump through the switching of the multi-channel switching valve, so that the automatic release separation of the strontium-90 is realized. Compared with the existing separation method, the device can obviously shorten the sample radiochemical separation time, the strontium-90 recovery rate is high and stable, and the separated sample can be directly measured by a liquid scintillator detector. In addition, the device can also effectively prolong the period of equipment maintenance and consumable replacement by adopting a plurality of color layer columns to be used in parallel.
The automatic strontium-90 radiocontraction separation apparatus according to an embodiment of the present invention is further described in detail with reference to fig. 1 to 6.
Fig. 1 is a schematic structural view showing an automatic strontium-90 radiocontraction separation apparatus according to an embodiment of the present invention. Referring to fig. 1, the strontium-90 automatic radiochemical separation apparatus includes 4 crown ether extraction chromatographic columns, namely, a crown ether extraction chromatographic column 110, a crown ether extraction chromatographic column 120, a crown ether extraction chromatographic column 130 and a crown ether extraction chromatographic column 140. When the device works, the sample can be radiochemical separated by sequentially using each crown ether extraction chromatographic column. In some embodiments, after one crown ether extraction chromatographic column is set to work for 8 times, the next crown ether extraction chromatographic column is switched to work continuously, so that 32 separation operations can be completed in one work cycle. Under the condition that the monitoring frequency is 1 time per day, the reagent is supplemented for about 1 month, thereby greatly prolonging the period of equipment maintenance and consumable replacement/supplement.
Referring to fig. 1, a multi-channel switching valve 100 has one main port 0 and a plurality of branch ports according to an embodiment of the present invention. The plurality of branch portals specifically include: a chromatographic column port 1, a chromatographic column port 2, a chromatographic column port 3, a chromatographic column port 4, a chromatographic column port 5, a liquid storage bottle port 6, a liquid storage bottle port 7, a liquid storage bottle port 8, a liquid storage bottle port 9 and a sample inlet port 10. Each branch port of the chromatographic column is connected with a crown ether extraction chromatographic column, and each branch port of the liquid storage bottle is connected with a liquid storage bottle. In this embodiment, since only 4 crown ether extraction chromatographic columns are provided, the chromatographic column port 5 is vacant.
Referring to fig. 1, according to an embodiment of the present invention, taking a crown ether extraction chromatographic column 110 as an example, the crown ether extraction chromatographic column 110 has an inlet and an outlet (not shown in the drawing); the sample inlet is connected with the chromatographic column branch port 1, and a manual needle valve 111 is arranged between the sample inlet and the chromatographic column branch port 1; the outlet is connected with a waste liquid bottle 112 and a liquid flash bottle 113, a first electromagnetic valve 301 is arranged between the waste liquid bottle 112 and the outlet, and a second electromagnetic valve 302 is arranged between the liquid flash bottle 113 and the outlet. The manual needle valve can be used for manually removing air bubbles in the device, the liquid discarding bottle is used for collecting discarded liquid flowing out of the chromatographic column, and the liquid flashing bottle is used for collecting a strontium-90 sample flowing out of the chromatographic column. In addition, it should be noted that other crown ether extraction chromatographic columns also have the configuration described above and are not shown in fig. 1.
Referring to fig. 1, the automatic strontium-90 radiochemical separation apparatus comprises a plurality of reservoirs 200, specifically comprising at least one equilibrium reservoir 210, at least one eluent reservoir 220, at least one eluent reservoir 230 and at least one waste reservoir 240. When the device works, the reciprocating metering pump firstly sucks the balance liquid from the balance liquid storage bottle and injects the balance liquid into the currently working chromatographic column to balance the chromatographic column, and the first electromagnetic valve is opened to enable the effluent liquid of the chromatographic column to flow to the waste liquid bottle; then injecting a sample to be separated into a working chromatographic column to ensure that strontium-90 is adsorbed on a stationary phase of the chromatographic column; then the reciprocating metering pump absorbs the leacheate from the leacheate storage bottle and injects the leacheate into the working chromatographic column for leaching, other nuclides in the sample are eluted and separated, and the first electromagnetic valve is opened to enable the effluent of the chromatographic column to flow to the waste liquid bottle; and finally, absorbing the eluent from the eluent storage bottle to elute the strontium-90 in the working chromatographic column, closing the first electromagnetic valve, opening the second electromagnetic valve, enabling the effluent of the chromatographic column to flow to the liquid flash bottle, and collecting the strontium-90. In addition, when the device works, the multi-channel switching valve can be automatically switched to the currently working main port and branch port. The waste liquid storage bottle 240 is mainly used for collecting waste liquid generated during maintenance and commissioning of the device.
According to the embodiment of the invention, the equilibrium liquid storage bottle contains concentrated nitric acid. Nitric acid with the concentration of 1-8 mol/L is contained in the leacheate storage bottle to serve as leacheate, and the concentration of the concentrated nitric acid is larger than that of the nitric acid serving as the leacheate. The eluent reservoir contains water, preferably deionized water. Under the working condition, the system recovery rate is high and stable. In some embodiments, the strontium-90 automatic discharge separation is carried out by using the device provided by the invention, and the recovery rate of the strontium-90 can be ensured to be more than 80%.
Referring to fig. 1, according to the embodiment of the present invention, one end of the reciprocating metering pump 300 is connected to the main port 0 of the multi-channel switching valve, and bubble sensors 400 are disposed between the reciprocating metering pump 300 and the main port 0 and at the sample inlet branch port 10 of the multi-channel switching valve. Therefore, whether bubbles are generated in the working process of the device can be monitored through the bubble sensor.
Referring to fig. 1, the other end of the reciprocating metering pump 300 is connected to the eluent reservoir bottle 240, and a third solenoid valve 303 and a bubble sensor 400 are disposed between the eluent reservoir bottle 240 and the reciprocating metering pump 300 according to the embodiment of the present invention. From this, through opening the third solenoid valve, can make reciprocal measuring pump directly absorb the eluant from the eluant storage bottle to in wash the device inside, and be convenient for the internal gas pressure of balancing unit. Meanwhile, the bubble sensor can be used for monitoring whether bubbles are generated in the working process of the device.
According to the embodiment of the invention, a main port of the multi-channel switching valve and the reciprocating metering pump, a branch port of the chromatographic column and the crown ether extraction chromatographic column, and a branch port of the liquid storage bottle and the liquid storage bottle are connected through polytetrafluoroethylene tubes. This can further reduce the adhesion of reagents to the pipeline, thereby reducing contamination between different reagents.
According to an embodiment of the present invention, further comprising: a control system (not shown in the drawings). The control system is connected with the multi-channel switching valve, the reciprocating metering pump, the first electromagnetic valve and the second electromagnetic valve. The control system is suitable for automatic operation of the control device, and particularly can automatically switch the multi-channel switching valve to the corresponding main port and the branch port according to the specific working state of the current working chromatographic column, control the reciprocating metering pump to suck the reagent from the corresponding liquid storage bottle, and control the opening or closing of the electromagnetic valve.
FIGS. 2 to 6 are schematic views of a strontium-90 automatic discharge separation device according to still another embodiment of the present invention. Referring to fig. 2 to 6, the automatic strontium-90 radiochemical separation apparatus provided by the present invention may further include: backup pad 11, translation sample bottle subassembly 12, stay liquid support 13, motor 14, stock solution bottle fixing base 15. The supporting plate is suitable for supporting the components of a crown ether extraction chromatographic column, a reciprocating metering pump, a manual needle valve, a bubble sensor and the like in the fixing device. The translation sample bottle assembly is suitable for automatically moving the liquid flash bottle and the liquid abandoning bottle to the lower part of the working chromatographic column according to the working state of the crown ether extraction chromatographic column so as to collect the effluent liquid of the chromatographic column. The liquid-retaining bracket is suitable for supporting the liquid flashing bottle. The motor is adapted to drive the translation of the sample vial assembly, preferably 42 motors. The liquid storage bottle fixing seat is suitable for fixing a plurality of liquid storage bottles.
Referring to fig. 1, the working steps of the automatic strontium-90 radiochemical separation apparatus according to the present invention are specifically described by taking a crown ether extraction chromatographic column 110 as an example, according to a specific example of the present invention:
(1) translating the sample bottle assembly to move the liquid discarding bottle 112 and the liquid flashing bottle 113 to the position below the color layer column of the work;
(2) the multi-channel switching valve is switched to the main port 0 and the branch port 8 of the liquid storage bottle, and the reciprocating metering pump 300 sucks concentrated nitric acid from the balance liquid storage bottle 210. Then the multi-channel switching valve is switched to the main port 0 and the color layer column branch port 1, and the reciprocating metering pump 300 injects concentrated nitric acid into the crown ether extraction color layer column 110, so that the color layer column is in a concentrated nitric acid environment. The first electromagnetic valve 301 is opened, and the waste liquid from the chromatographic column enters the waste liquid bottle 112.
(3) The multi-channel switching valve is switched to the main port 0 and the sample inlet branch port 10, and the reciprocating metering pump 300 sucks a sample to be separated. Then the multi-channel switching valve is switched to a main port 0 and a chromatographic column branch port 1, a reciprocating metering pump 300 injects a sample into the crown ether extraction chromatographic column 110, and strontium-90 in the sample is adsorbed on the chromatographic column in a concentrated nitric acid environment. The first electromagnetic valve 301 is opened, and the waste liquid from the chromatographic column enters the waste liquid bottle 112.
(4) The multi-channel switching valve is switched to the main port 0 and the branch port 7 of the liquid storage bottle, and the reciprocating metering pump 300 sucks nitric acid leacheate (the concentration of which is lower than that of concentrated nitric acid in the step 2) from the leacheate storage bottle 220. Then the multi-channel switching valve is switched to a main port 0 and a chromatographic column branch port 1, the reciprocating metering pump 300 injects nitric acid leacheate into the crown ether extraction chromatographic column 110, and other radioactive nuclides except strontium-90 in the chromatographic column are removed by leaching. The first electromagnetic valve 301 is opened, and the waste liquid from the chromatographic column enters the waste liquid bottle 112.
(5) The multi-channel switching valve is switched to the main port 0 and the branch port 6 of the liquid storage bottle, and the reciprocating metering pump 300 sucks deionized water from the eluent storage bottle 230. Then the multi-channel switching valve is switched to a main port 0 and a chromatographic column branch port 1, deionized water is injected into the crown ether extraction chromatographic column 110 by the reciprocating metering pump 300, and strontium-90 adsorbed on the chromatographic column is eluted. The second solenoid valve 302 is opened and the sample from the chromatographic column enters the flash vial 113. Subsequent translation of the sample vial assembly moves the liquid flash vial to the measurement device.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. An automatic strontium-90 liberating separation device, comprising:
a plurality of crown ether extraction chromatographic columns;
a plurality of reservoirs comprising at least one balance reservoir, at least one eluent reservoir, and at least one waste reservoir;
the multi-channel switching valve is provided with a main port, a sample inlet branch port, a plurality of chromatographic column branch ports and a plurality of liquid storage bottle branch ports, each chromatographic column branch port is connected with one crown ether extraction chromatographic column, and each liquid storage bottle branch port is connected with one liquid storage bottle;
one end of the reciprocating metering pump is connected with the main port;
the crown ether extraction chromatographic column is provided with a sample inlet and a flow outlet; the sample inlet is connected with the branch port of the chromatographic column, and a manual needle valve is arranged between the sample inlet and the branch port; the outlet is connected with a waste liquid bottle and a liquid flash bottle, a first electromagnetic valve is arranged between the waste liquid bottle and the outlet, and a second electromagnetic valve is arranged between the liquid flash bottle and the outlet;
the other end of the reciprocating metering pump is connected with the eluent storage bottle, and a third electromagnetic valve and a bubble sensor are arranged between the eluent storage bottle and the reciprocating metering pump.
2. The automatic strontium-90 radioactive separation device according to claim 1, wherein the equilibrium liquid storage bottle contains concentrated nitric acid.
3. The automatic strontium-90 radioactive separation device according to claim 1, wherein an leacheate is contained in the leacheate storage bottle, and the leacheate is nitric acid with the concentration of 1-8 mol/L.
4. The automatic strontium-90 radioactive separation device according to claim 1, wherein the eluent reservoir contains water.
5. The automatic strontium-90 radioactive separation device according to claim 1, wherein the eluent reservoir contains deionized water.
6. The automatic strontium-90 radioactive separation device according to claim 1, wherein bubble sensors are arranged between the reciprocating metering pump and the main port and at the sample inlet branch.
7. The automatic strontium-90 radiochemical separation device according to claim 1, wherein the main port and the reciprocating metering pump, the branch port of the chromatographic column and the crown ether extraction chromatographic column, and the branch port of the liquid storage bottle and the liquid storage bottle are all connected by polytetrafluoroethylene tubes.
8. The automatic strontium-90 amplification separation device of claim 1, further comprising: and the control system is connected with the multi-channel switching valve, the reciprocating metering pump, the first electromagnetic valve and the second electromagnetic valve.
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| CN103901461A (en) * | 2014-04-22 | 2014-07-02 | 苏州热工研究院有限公司 | Method for rapidly analyzing strontium-90 in liquid state efflux of nuclear power plant |
| CN109499095A (en) * | 2018-11-30 | 2019-03-22 | 南京浦世环境科技发展有限公司 | Full-automatic element sepatation purification devices |
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