JP2007333624A - Solid/liquid interface reaction evaluating method and solid/liquid interface reaction evaluating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid/liquid interface reaction evaluating device capable of accurately evaluating solid/liquid interface reaction. <P>SOLUTION: The solid/liquid interface reaction evaluating device A1 provided with a flow passage 5 formed along a surface of an evaluation target 3 (solid phase) to make a solution including a tracer material flow and a radiation measuring device (concentration measuring means) for measuring concentration variation of the tracer material in the solution passing through the flow passage 5 is further provided with a valve 6 (pressure controlling means) for controlling a pressure of the solution in the flow passage 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a solid-liquid interface reaction evaluation method and a solid-liquid interface reaction evaluation apparatus. For example, when a solution (liquid phase) containing a tracer substance is brought into contact with an evaluation object (solid phase) such as rock, this evaluation is performed. The present invention relates to a solid-liquid interface reaction evaluation method and a solid-liquid interface reaction evaluation apparatus that can be suitably used for evaluating the degree of diffusion and adsorption of a tracer substance in an object.

Conventionally, as a solid-liquid interface reaction evaluation apparatus, it is installed inside a boring hole provided in a rock mass, and a reagent flow path formed along the surface of the rock mass (solid phase) and passes through this flow path. And a measuring device that measures a change in the concentration of the tracer substance in the reagent (see, for example, Patent Document 1).
In this solid-liquid interface reaction evaluation apparatus, when the reagent is fed into the flow path by the liquid feed pump, the reagent flows while contacting the surface of the rock. The tracer substance contained in the reagent diffuses into the rock. In such a solid-liquid interface reaction evaluation apparatus, the above-mentioned measuring device measures the change in the concentration of the tracer substance in the reagent that has passed through the flow path, so that the diffusion coefficient in the rock mass and the distribution between the rock mass and groundwater A coefficient will be obtained.
JP-A-2005-315607

  However, in the conventional solid-liquid interface reaction evaluation apparatus, when the pressure of the reagent in the flow path becomes higher than the pressure of the liquid phase in the rock (such as groundwater), the reagent flows from the flow path toward the rock, On the contrary, if it becomes low, groundwater (liquid phase) etc. will flow in the flow path from the bedrock side. Therefore, in the conventional solid-liquid interface reaction evaluation apparatus, there is a possibility that the change in the concentration of the tracer substance cannot be accurately measured due to fluctuations in the pressure of the reagent sent into the flow path. That is, in the conventional solid-liquid interface reaction evaluation apparatus, there is a possibility that the evaluation of the solid-liquid interface reaction such as measurement of a distribution coefficient and a diffusion coefficient cannot be performed with high accuracy.

  Then, this invention makes it a subject to provide the solid-liquid interface reaction evaluation method and solid-liquid interface reaction evaluation apparatus which can evaluate solid-liquid interface reaction accurately.

The solid-liquid interface reaction evaluation method of the present invention that solves the above problems includes a solution flow step of flowing a solution containing a tracer substance in a flow path formed along the surface of a solid phase, and the above-mentioned flow path that has passed through the flow path. A solid-liquid interface reaction evaluation method including a concentration measurement step of measuring a concentration change of the tracer substance in the solution, further comprising a pressure control step of controlling the pressure of the solution in the flow path.
In addition, the solid-liquid interface reaction evaluation apparatus of the present invention that solves the above problems includes a flow path formed along the surface of a solid phase so that a solution containing a tracer substance is circulated, and the flow path that has passed through the flow path. A solid-liquid interface reaction evaluation apparatus including a concentration measurement unit that measures a change in the concentration of the tracer substance in a solution, further comprising a pressure control unit that controls the pressure of the solution in the flow path.
In such a solid-liquid interface reaction evaluation method and solid-liquid interface reaction evaluation apparatus of the present invention, the solution (liquid phase) between the flow path and the solid phase is controlled by controlling the pressure of the solution in the flow path. Inflow and outflow are suppressed.

  According to the solid-liquid interface reaction evaluation method and the solid-liquid interface reaction evaluation apparatus of the present invention, since the inflow and outflow of the solution (liquid phase) between the flow path and the solid phase is suppressed, the evaluation of the reaction at the solid-liquid interface Can be performed with high accuracy.

(First embodiment)
Next, a first embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the drawings to be referred to, FIG. 1 is a configuration explanatory diagram of a solid-liquid interface reaction evaluation apparatus according to the present embodiment. FIG. 2 is an exploded perspective view of the microchannel chip.

  As shown in FIG. 1, the solid-liquid interface reaction evaluation apparatus A1 according to the present embodiment obtains the diffusion coefficient and distribution coefficient of a liquid sample (tracer substance) in an evaluation object 3 (solid phase) made of granite stone. A water tank 2 in which the evaluation object 3 is immersed, a microchannel chip 4 attached to the evaluation object 3, a channel 5 formed in the microchannel chip 4, and the channel 5 Are provided with a pipe T1 and a pipe T2 connected to each other, a liquid feed pump 1 for feeding a liquid sample into the flow path 5 through the pipe T1, and a valve 6 and a radiation measuring device 7 provided in the pipe T2. The liquid sample corresponds to the solution described in the claims, the radiation measuring device 7 corresponds to the concentration measuring means, and the valve 6 corresponds to the pressure control means.

  The liquid sample used in this embodiment is an aqueous solution of a salt containing strontium-85 (hereinafter sometimes simply referred to as “Sr-85”) which is a radionuclide as a tracer substance. In addition, as this tracer substance, it is not limited to this, The well-known thing containing a radioisotope can be used.

As shown in FIG. 2, the microchannel chip 4 includes a gasket 4c having a slit 4d formed at the center thereof, and a substrate chip 4b. The gasket 4c is formed of an elastic member such as polytetrafluoroethylene. When the gasket 4c is disposed between the evaluation object 3 and the substrate chip 4b, the flow path 5 is formed in the slit 4d. That is, the flow path 5 is formed along the surface of the evaluation object 3. The substrate chip 4b is formed with a pair of communication holes 4a and 4a so as to communicate with both ends of the slit 4d. A pipe T1 and a pipe T2 (see FIG. 1) are connected to the communication holes 4a and 4a, respectively.
As shown in FIG. 1, such a microchannel chip 4 is arranged such that the channel 5 is horizontal at a depth H from the water surface in the water tank 2.

  As shown in FIG. 1, the liquid feed pump 1 in the present embodiment is configured by a constant volume pump such as a syringe pump or a plunger pump. The liquid feed pump 1 supplies the liquid sample to the flow path 5 at a predetermined flow rate.

  The opening degree of the valve 6 can be adjusted, and when the liquid sample delivered from the liquid feed pump 1 flows through the pipe T1, the flow path 5, and the pipe T2, as described later, Control is performed so that the pressure of the liquid sample in the channel 5 becomes a predetermined pressure P1.

  The radiation measuring device 7 detects the concentration of the tracer substance in the recovered liquid sample when the liquid sample is recovered from the flow path 5 via the pipe T2.

  Next, while explaining the operation of the solid-liquid interface reaction evaluation apparatus A1, a solid-liquid interface reaction evaluation method (hereinafter simply referred to as “evaluation method”) using the solid-liquid interface reaction evaluation apparatus A1 is referred to as appropriate. While explaining. Here, the evaluation method of the present invention will be described taking as an example a method for measuring the diffusion coefficient and distribution coefficient in granite (solid phase).

  First, in this evaluation method, as shown in FIG. 1, an evaluation object 3 (a granite stone plate) to which a microchannel chip 4 is attached is immersed in a water tank 2. At this time, the channel 5 of the microchannel chip 4 is horizontal at a depth H from the water surface of the water tank 2 as described above.

  Next, the liquid sample is fed into the flow path 5 from the liquid feed pump 1. As a result, a liquid sample containing a predetermined amount of Sr-85 as a tracer substance flows through the flow path 5. This step corresponds to a “solution distribution step” in the claims.

  And when a liquid sample distribute | circulates the flow path 5, the pressure of the liquid sample in the flow path 5 is controlled by adjusting the opening degree of the valve 6 provided in the piping T2. This step corresponds to a “pressure control step” in the claims.

  As shown in FIG. 1, in this step, the flow path 5 is disposed at a depth H from the water surface of the water tank 2, so that the water pressure of the granite portion X facing the flow path 5, that is, in the granite The pressure of the water filled in the minute gap is P2 in balance with the water head at this position. In this step, the pressure P1 of the liquid sample fed into the flow path 5 is set to be equal to P2 by adjusting the opening of the valve 6.

  When the liquid sample flowing through the flow path 5 reaches the radiation measurement device 7 via the valve 6, the radiation measurement device 7 measures a change in the concentration of Sr-85 (tracer substance) in the liquid sample. This step corresponds to the “concentration measuring step” in the claims.

This change in the concentration of the tracer substance is that the tracer substance contained in the liquid sample diffuses into the granite when it comes into contact with the surface of the evaluation object 3 (granite stone plate) while flowing through the flow path 5. Caused by.
In this evaluation method, a breakthrough curve of the tracer substance in the evaluation object 3 (a granite stone plate) is created based on the change in the concentration of the tracer in the liquid sample measured by the radiation measuring device 7.

  FIG. 3 referred to here is a graph showing a breakthrough curve of Sr-85 (tracer substance) in the evaluation object 3 (granite stone plate). The concentration ratio of Sr-85 is shown, and the accumulated capacity of the liquid sample flowing through the flow path 5 is shown on the horizontal axis. The concentration ratio on the vertical axis is the ratio of the concentration of Sr-85 in the liquid sample that has passed through the flow path 5 to the concentration of Sr-85 in the liquid sample sent from the liquid feed pump 1. Incidentally, when the breakthrough curve was obtained, the flow rate of the liquid sample in the flow path 5 was set to 10 μL / min.

  As shown in the “input waveform of the Sr-85 concentration” represented by the broken line in FIG. 3, a liquid sample having a Sr-85 concentration ratio of 1 is supplied to the flow path 5 (see FIG. 1). The Then, as shown by the breakthrough curve represented by the solid line in FIG. 3, Sr-85 in the liquid sample that has passed through the flow path 5 is initially evaluated as the liquid sample is supplied to the flow path 5. 3 (see FIG. 1) is consumed by diffusing. Thereafter, as the integrated capacity increases, the concentration ratio of Sr-85 (tracer substance) increases. As the integrated capacity further increases, the concentration ratio of Sr-85 becomes substantially constant at a predetermined value less than 1, and the evaluation object 3 (a granite stone plate) becomes a breakthrough state.

  In this evaluation method, a known method for comparing data obtained based on such a breakthrough curve and data obtained separately by simulation (see, for example, JP-A-2005-315607) is used. Thus, the diffusion coefficient of the evaluation object 3 (granite stone plate) and the distribution coefficient of the tracer substance with respect to the evaluation object 3 are calculated. Incidentally, the distribution coefficient obtained in the present embodiment was 100 mL / g.

  In the evaluation method using the solid-liquid interface reaction evaluation apparatus A1 as described above, as described above, the pressure P1 of the liquid sample (liquid phase) in the flow path 5 is the pressure P2 of the evaluation object 3 (solid phase). Can be controlled by the valve 6 so as to be equal to. As a result, in this evaluation method, the inflow and outflow of the liquid sample (liquid phase) between the flow path 5 and the evaluation object 3 (solid phase) is suppressed. That is, the amount of the liquid sample supplied from the liquid feed pump 1 to the flow path 5 and the amount of the liquid sample sent out from the flow path 5 are substantially the same. Therefore, according to this solid-liquid interface reaction evaluation apparatus A1 and the evaluation method using the same, it is possible to accurately evaluate the reaction at the solid-liquid interface.

(Second Embodiment)
Next, a second embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the drawings to be referred to, FIG. 4 is a configuration explanatory diagram of the solid-liquid interface reaction evaluation apparatus according to the present embodiment. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, in the solid-liquid interface reaction evaluation apparatus A2 according to the present embodiment, water enters and exits the water tank 2 through the water supply port 2a and the water discharge port 2b provided in the water tank 2. The water level of the water tank 2 is changed. The solid-liquid interface reaction evaluation apparatus A2 is provided with a pressure sensor S for detecting the water pressure of the granite portion X facing the flow path 5, that is, the pressure P2 of water filled in a minute gap in the granite. ing. The pressure sensor S is configured to output a pressure detection signal to the valve 6a, and corresponds to “pressure detection means” in the claims.

  The valve 6a incorporates a controller (not shown), and a pressure detection signal from the pressure sensor S is input to this controller. The controller that has input the pressure detection signal controls the pressure P1 of the liquid sample in the flow path 5 to be equal to the pressure P2 by adjusting the opening of the valve 6a based on the pressure P2. The valve 6a corresponds to “pressure control means” in the claims.

Next, while describing the operation of the solid-liquid interface reaction evaluation apparatus A2, an evaluation method using the solid-liquid interface reaction evaluation apparatus A2 will be described with reference to the drawings as appropriate.
In this solid-liquid interface reaction evaluation apparatus A2, when the pressure P2 fluctuates due to fluctuations in the water level of the water tank 2, the valve 6a controls the pressure P1 to be equal to the pressure P2 as described above. . As a result, in this evaluation method, the outflow of the liquid sample (liquid phase) between the flow path 5 and the evaluation object 3 (solid phase) regardless of the fluctuation of the pressure P2 of the evaluation object 3 (solid phase). Input is suppressed. Therefore, according to the solid-liquid interface reaction evaluation apparatus A2 and the evaluation method using the same, the reaction at the solid-liquid interface is accurately evaluated regardless of the fluctuation of the pressure P2 of the evaluation object 3 (solid phase). be able to.

Next, using such a solid-liquid interface reaction evaluation apparatus A2, the effect of the fluctuation of the pressure P2 on the flow rate of the liquid sample in the flow path 5 and the measured value of the concentration ratio of the tracer substance are verified. did.
First, a liquid sample containing tritium as a tracer substance was supplied from the liquid feed pump 1 shown in FIG. Incidentally, the flow rate of the liquid sample in the flow path 5 was set to 20 μL / min. As is well known, this tritium is hardly adsorbed on the granite as the evaluation object 3 (solid phase).

  Thus, when the liquid sample is supplied to the flow path 5, the water level of the water tank 2 fluctuates as described above. And here, the water pressure P2 of the granite portion X shown in FIG. 4 was measured. The result is shown in FIG. FIG. 5A is a graph in which the vertical axis represents the pressure P2 of the granite portion X and the horizontal axis represents the time (elapsed time) during which the pressure P2 was measured. As is clear from FIG. 5A, the pressure P2 always fluctuated with the passage of time. At this time, in the solid-liquid interface reaction evaluation apparatus A2, as described above, the pressure P1 in the flow path 5 is controlled to be equal to the pressure P2 by adjusting the opening degree of the valve 6a shown in FIG. Yes.

  Here, the flow rate of the liquid sample in the channel 5 shown in FIG. 4 was measured. The result is shown as “Example” in FIG. FIG. 5B is a graph in which the vertical axis represents the flow rate of the liquid sample in the flow path 5 and the horizontal axis represents the time (elapsed time) at which the flow rate was measured. Incidentally, the time for measuring the flow velocity on the horizontal axis corresponds to the time for measuring the pressure P2 indicated by the horizontal axis in FIG. As is apparent from FIG. 5B, the flow rate of the liquid sample in the flow path 5 hardly fluctuates.

  Here, the concentration ratio of the tracer substance in the liquid sample that has passed through the flow path 5 is measured by the radiation measuring device 7, whereby the concentration ratio of the tracer substance is measured in the same manner as in the first embodiment. The result is shown as “Example” in FIG. FIG. 5C is a graph in which the vertical axis represents the concentration ratio of the tracer substance in the liquid sample that has passed through the flow path 5, and the horizontal axis represents the time (elapsed time) at which the concentration ratio was measured. Incidentally, the time for measuring the concentration ratio on the horizontal axis corresponds to the time for measuring the pressure P2 indicated by the horizontal axis in FIG. As is clear from FIG. 5C, the measured concentration ratio hardly fluctuates.

Next, except that the opening degree of the valve 6a is not adjusted by the pressure sensor S shown in FIG. 4, the solid-liquid interface reaction evaluation apparatus configured in the same manner as the solid-liquid interface reaction evaluation apparatus A2 is used. The flow rate of the liquid sample and the concentration ratio of the tracer substance were measured as described above. The results are shown as “comparative examples” in FIGS. As is clear from FIGS. 5B and 5C, in the solid-liquid interface reaction evaluation apparatus of the comparative example, the flow rate of the liquid sample in the flow path 5 and the concentration ratio of the tracer substance are accompanied by the fluctuation of the pressure P2. It has fluctuated.
As described above, according to the solid-liquid interface reaction evaluation apparatus A2, the evaluation object 3 (solid phase) is different from the solid-liquid interface reaction evaluation apparatus (comparative example) in which the pressure sensor S does not adjust the opening degree of the valve 6a. It was verified that the solid-liquid interface reaction can be evaluated accurately regardless of the fluctuation of the pressure P2.

(Third embodiment)
Next, a third embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the drawings to be referred to, FIG. 6 is a configuration explanatory diagram of the solid-liquid interface reaction evaluation apparatus according to the present embodiment. In the present embodiment, the same components as those in the first embodiment and the second embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 6, the solid-liquid interface reaction evaluation apparatus A3 according to the present embodiment is a liquid sample (tracer substance) in an evaluation object 3a (solid phase) such as a biological epidermis (including animal and plant epidermis). ) Of the microchannel chip 4 attached to the evaluation object 3a, the channel 5 formed in the microchannel chip 4, and the channel 5 connected thereto. The pipe T1 and the pipe T2, the liquid feed pump 1a for feeding the liquid sample to the flow path 5 through the pipe T1, the flow meter 9, the valve 6b and the radiation measuring device 7 provided in the pipe T2, and the control unit 8 And. The flow meter 9 corresponds to “flow rate measuring means” in the claims, and the valve 6b corresponds to pressure control means.

The liquid feed pump 1a in the present embodiment is configured to supply the above-described liquid sample to the flow path 5 and to output a flow rate signal of the liquid sample to be sent out to the control unit 8.
The flow meter 9 measures the flow rate of the liquid sample that has passed through the flow path 5 and outputs the measured flow rate signal to the control unit 8.

  The valve 6b is configured to control the pressure P1 of the liquid sample in the flow path 5 by adjusting the opening degree based on a command signal from the control unit 8 described below in accordance with a procedure described later.

  Based on the flow rate signal from the liquid feed pump 1 a and the flow rate signal from the flow meter 9, the control unit 8 outputs a command signal that causes the valve 6 b to adjust its opening degree. This command signal includes the flow rate value of the liquid sample sent from the liquid feed pump 1a to the flow path 5, the flow rate value measured by the flow meter 9, and the skin of the evaluation object 3a (solid phase) shown in FIG. The control unit 8 outputs based on a predetermined map representing the correlation between the pressure P2 in the portion X and the pressure P1 of the liquid sample in the flow path 5. That is, the control unit 8 outputs the command signal to the valve 6b, thereby controlling the opening degree of the valve 6b so that the pressure P1 of the liquid sample in the flow path 5 is equal to the pressure P2. .

Next, while describing the operation of the solid-liquid interface reaction evaluation apparatus A3, an evaluation method using the solid-liquid interface reaction evaluation apparatus A3 will be described with reference to the drawings as appropriate.
In this solid-liquid interface reaction evaluation apparatus A3, for example, the value of the flow rate measured by the flow meter 9 becomes larger than the pressure value of the liquid sample sent from the liquid feed pump 1a, and the pressure P1 is higher than the pressure P2. When it becomes small, the control part 8 narrows the opening degree of the valve 6b so that the pressure P1 becomes equal to the pressure P2 by outputting a command signal to the valve 6b. On the contrary, when the flow rate value measured by the flow meter 9 is smaller than the flow rate value of the liquid sample delivered from the liquid delivery pump 1a, and the pressure P1 becomes higher than the pressure P2. The controller 8 widens the opening of the valve 6b by outputting a command signal to the valve 6b so that the pressure P1 becomes equal to the pressure P2.
According to such a solid-liquid interface reaction evaluation apparatus A3 and an evaluation method using the same, it is possible to accurately evaluate the solid-liquid interface reaction regardless of fluctuations in the flow rate of the liquid sample in the flow path 5. it can.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the drawings to be referred to, FIG. 7 is a configuration explanatory diagram of the solid-liquid interface reaction evaluation apparatus according to the present embodiment. In the present embodiment, the same components as those in the first embodiment, the second embodiment, and the third embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.
As shown in FIG. 7, the solid-liquid interface reaction evaluation apparatus A4 according to this embodiment is a liquid sample (tracer) in an evaluation object 3b (solid phase) such as a rock that forms the wall surface of a boring hole drilled in the ground. Material) diffusion coefficient and distribution coefficient, the microchannel chip 4 attached to the evaluation object 3b, the channel 5 formed in the microchannel chip 4, and the channel 5 A connected pipe T1 and a pipe T2, a liquid feed pump 1a for sending a liquid sample to the flow path 5 through the pipe T1, a flow meter 9, a radiation measuring device 7 and a recovery pump 1b provided in the pipe T2, And a control unit 8a. Here, the liquid feed pump 1a, the recovery pump 1b, and the control unit 8a correspond to “pressure control means” in the claims.

  The liquid sample used in this embodiment is an aqueous solution of a salt containing strontium-85 which is a radionuclide as a tracer substance.

The liquid feed pump 1a in the present embodiment is configured to supply the above-described liquid sample to the flow path 5, and to output a flow rate signal of the liquid sample to be sent out to the control unit 8a.
The flow meter 9 measures the flow rate of the liquid sample that has passed through the flow path 5 and outputs the measured flow rate signal to the control unit 8a.

  Based on the flow rate signal from the liquid feed pump 1a and the flow rate signal from the flow meter 9, the control unit 8a outputs a command signal that causes the recovery pump 1b to adjust the flow rate for recovering the liquid sample. This command signal includes the value of the flow rate of the liquid sample sent from the liquid feed pump 1a to the flow path 5, the value of the flow rate measured by the flow meter 9, and the bedrock of the evaluation object 3b (solid phase) shown in FIG. The controller 8a outputs based on a predetermined map representing the correlation between the pressure P2 in the portion X and the pressure P1 of the liquid sample in the flow path 5. That is, the control unit 8a outputs the command signal to the recovery pump 1b, thereby controlling the flow rate of recovery of the liquid sample in the recovery pump 1b so that the pressure P1 of the liquid sample in the flow path 5 is equal to the pressure P2. It is supposed to be.

Next, while describing the operation of the solid-liquid interface reaction evaluation apparatus A4, an evaluation method using the solid-liquid interface reaction evaluation apparatus A4 will be described with reference to the drawings as appropriate.
In the solid-liquid interface reaction evaluation apparatus A4, for example, the flow meter 9 measures the flow rate of the liquid sample after the liquid sample delivered from the liquid feed pump 1a passes through the microchannel chip 4. When the flow rate measured by the flow meter 9 is larger than the predetermined flow rate of the liquid sample delivered from the liquid delivery pump 1a, that is, when the pressure P1 is smaller than the pressure P2, The controller 8 outputs a command signal to the recovery pump 1b to reduce the flow rate of recovery of the liquid sample in the recovery pump 1b so that the pressure P1 becomes equal to the pressure P2. On the contrary, when the flow rate measured by the flow meter 9 becomes smaller than the predetermined flow rate of the liquid sample sent out from the liquid feed pump 1a, that is, when the pressure P1 becomes higher than the pressure P2. The controller 8 outputs a command signal to the recovery pump 1b to increase the flow rate of recovery of the liquid sample in the recovery pump 1b so that the pressure P1 becomes equal to the pressure P2.
According to such a solid-liquid interface reaction evaluation apparatus A4 and an evaluation method using the same, the evaluation of the solid-liquid interface reaction can be performed with a simpler mechanism regardless of fluctuations in the flow rate of the liquid sample in the flow path 5. It can be performed with high accuracy.

In addition, this invention is implemented in various forms, without being limited to the said embodiment.
In the third embodiment, the pressure P1 of the liquid sample in the flow channel 5 is controlled based on the measured value of the flow rate of the liquid sample in the flow channel 5, but the present invention is not limited to this. For example, even if pressure measuring means for measuring the pressure in the flow path 5 is provided and the pressure P1 is controlled to be equal to the pressure P2 based on the pressure value measured by the pressure measuring means. Good. In this case, the pressure P1 may be controlled to be equal to the pressure P2 based on both the measured value of the flow rate of the liquid sample and the measured value of the pressure.

It is composition explanatory drawing of the solid-liquid interface reaction evaluation apparatus which concerns on 1st Embodiment. It is a disassembled perspective view of the microchannel chip which constitutes the solid-liquid interface reaction evaluation device concerning a 1st embodiment. It is a graph which shows the breakthrough curve of Sr-85 (tracer substance) in an evaluation object (a granite stone board), and shows the concentration ratio of Sr-85 in the liquid sample which passed through the flow path on the vertical axis. The axis indicates the integrated capacity of the liquid sample flowing through the flow path. It is composition explanatory drawing of the solid-liquid interface reaction evaluation apparatus which concerns on 2nd Embodiment. (A) is a graph in which the vertical axis represents the pressure in the granite portion and the horizontal axis represents the time during which the pressure in the granite portion was measured. (B) is a graph in which the vertical axis represents the flow rate of the liquid sample in the flow path, and the horizontal axis represents the time during which the flow rate was measured. (C) is a graph in which the vertical axis represents the concentration ratio of the tracer substance in the liquid sample that has passed through the flow path, and the horizontal axis represents the time at which the concentration ratio was measured. It is composition explanatory drawing of the solid-liquid interface reaction evaluation apparatus which concerns on 3rd Embodiment. It is composition explanatory drawing of the solid-liquid interface reaction evaluation apparatus which concerns on 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Liquid feed pump 1b Recovery pump 3 Evaluation object 3a Evaluation object 3b Evaluation object 5 Flow path 6 Valve (pressure control means)
6a Valve (pressure control means)
6b Valve (pressure control means)
7 Radiation measurement equipment (concentration measuring means)
8a Control unit (pressure control means)
9 Flow meter (flow rate measuring means)
A1 Solid-liquid interface reaction evaluation device A2 Solid-liquid interface reaction evaluation device A3 Solid-liquid interface reaction evaluation device A4 Solid-liquid interface reaction evaluation device S Pressure sensor (pressure detection means)

Claims (8)

A solution flow step for flowing a solution containing a tracer substance through a flow path formed along the surface of the solid phase; a concentration measurement step for measuring a concentration change of the tracer substance in the solution that has passed through the flow path; In the solid-liquid interface reaction evaluation method having
The solid-liquid interface reaction evaluation method further comprising a pressure control step of controlling the pressure of the solution in the flow path.   2. The solid-liquid interface reaction evaluation method according to claim 1, wherein in the pressure control step, the pressure of the solution in the flow path is controlled so as to be matched with the pressure in the solid phase.   In the pressure control step, the pressure of the solution in the channel is measured by at least one of a measured value of the pressure of the solution in the channel and a measured value of the flow rate of the solution in the channel. The solid-liquid interface reaction evaluation method according to claim 1, wherein the solid-liquid interface reaction evaluation method is controlled based on a value.   In the pressure control step, the pressure of the solution in the flow path is controlled by adjusting a flow rate at which the solution is fed into the flow path and a flow rate at which the solution is recovered from the flow path. The solid-liquid interface reaction evaluation method according to any one of claims 1 to 3. A flow path formed along the surface of the solid phase so that a solution containing the tracer substance flows, and a concentration measuring means for measuring a concentration change of the tracer substance in the solution that has passed through the flow path. In the solid-liquid interface reaction evaluation device,
The solid-liquid interface reaction evaluation apparatus further comprising pressure control means for controlling the pressure of the solution in the flow path.   Pressure detecting means for detecting the pressure in the solid phase; and the pressure control means detects the pressure of the solution in the flow path based on a pressure detection signal from the pressure detecting means. The solid-liquid interface reaction evaluation apparatus according to claim 5, wherein the apparatus is controlled so as to match the pressure of the solid-liquid interface.   It further comprises at least one of pressure measuring means for measuring the pressure of the solution in the flow path and flow rate measuring means for measuring the flow rate of the solution in the flow path, and the pressure control means includes the pressure control means, Controlling the pressure of the solution in the channel based on at least one of the measured value of the pressure of the solution in the channel and the measured value of the flow rate of the solution in the channel. The solid-liquid interface reaction evaluation apparatus according to claim 5 or 6, characterized in that:   The pressure control means includes a liquid feed pump that feeds the solution into the flow path, and a recovery pump that collects the solution from the flow path, and the pressure control means includes the solution that is fed by the liquid feed pump. 8. The pressure of the solution in the flow path is controlled by adjusting the flow rate of the solution and the flow rate of the solution recovered by the recovery pump. 8. The solid-liquid interface reaction evaluation apparatus described.

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