WO2017099170A1

WO2017099170A1 - Electronic scale

Info

Publication number: WO2017099170A1
Application number: PCT/JP2016/086518
Authority: WO
Inventors: 加藤　昌央; 雅俊 ▲高▼橋; 弘浜本
Original assignee: 株式会社島津製作所
Priority date: 2015-12-11
Filing date: 2016-12-08
Publication date: 2017-06-15
Also published as: WO2017098671A1

Abstract

Provided is an electronic scale whereby a desired preparation amount of each sample can be easily prepared and a buffer solution generated. Preparation amounts for each sample, when preparing a plurality of types of sample and generating a buffer solution, are stored as preparation information in a storage unit (30). A ratio is specified by a ratio specification processing unit (24). A preparation amount calculation unit (23) calculates preparation amounts for each sample, on the basis of the preparation information stored in the storage unit (30) and on the basis of the ratios specified by the ratio specification processing unit (24). A display processing unit (22) displays the preparation amounts for each sample calculated by the preparation amount calculation unit (23), on a display unit (40).

Description

electronic balance

The present invention relates to an electronic balance that weighs a sample and displays the measured value on a display unit.

The electronic balance is provided with, for example, a display unit, and the measured value of the sample is displayed on the display unit (for example, see Patent Document 1 below). The operator can prepare a plurality of types of samples by measuring while confirming the display on the display unit.

When preparing a buffer solution by preparing a plurality of types of samples, the amount of each sample to be used when generating a fixed amount (for example, 1 L) of a buffer solution is used as preparation information (so-called “recipe”) in the electronic balance. Store in the storage unit. For example, when 1 L of 20 mM citrate (sodium) buffer solution is produced at pH = 3.1, 3.51 g of citric acid monohydrate (MW = 210.14), sodium citrate dihydrate 0.97 g of (MW = 294.10) may be prepared and 1 L of water may be added, and the preparation amount of each of these samples is stored in the storage unit as preparation information.

The worker reads out the formulation information stored in the storage unit, and sequentially displays the formulation amount of each sample on the display unit. In the above example, the amount of citric acid monohydrate (MW = 210.14) is displayed as 3.51 g on the display unit, and after weighing the sample, sodium citrate dihydrate (MW = 0.94 g is displayed on the display unit as the blending amount of 294.10), and the sample is weighed. In this way, the certain amount of the buffer solution can be generated by sequentially weighing each sample.

Japanese Patent No. 4770925

As described above, if each sample is prepared with the preparation amount stored in the storage unit as preparation information, the predetermined amount of buffer solution can be generated. However, since it is not possible to produce a buffer solution in an amount different from the above-mentioned constant amount, if the desired amount of the buffer solution is different from the above-mentioned constant amount, a buffer solution is produced more than necessary or multiple times. In some cases, a buffer solution must be generated separately.

In such a case, the preparation amount of each sample corresponding to the desired amount of buffer solution is newly stored in the storage unit as preparation information. However, the task of storing formulation information for each desired amount of buffer solution has been cumbersome. In addition, there is a case where it is desired to change the preparation amount of each sample stored in the storage unit as preparation information and prepare at a different pH. In such a case, the preparation amount of each sample is newly stored as preparation information in the storage unit. Must be remembered. Furthermore, as a problem peculiar to buffer solutions, there are so many kinds of buffer solutions that only a large capacity storage unit is required to store all the formulation information of these buffer solutions in the storage unit. In addition, when actually preparing the formulation, it may take time to select the formulation information of the desired buffer solution, or the formulation information may not be reached. On the other hand, the formulation information of specific buffer solutions (for example, 13 types) has a special situation that it is preferable that it can be easily read from the storage unit because it is frequently used.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electronic balance capable of easily preparing a buffer solution by preparing each sample with a desired preparation amount.

An electronic balance according to the present invention is an electronic balance that weighs a sample and displays the measured value on a display unit, and includes a storage unit, a ratio designation processing unit, a preparation amount calculation unit, and a display processing unit. . The said memory | storage part memorize | stores the preparation amount of each sample at the time of mix | blending multiple types of samples and producing | generating a buffer solution as preparation information. The ratio designation processing unit designates a ratio. The said preparation amount calculation part calculates the preparation amount of each sample based on the preparation information memorize | stored in the said memory | storage part and the ratio designated by the said ratio designation | designated process part. The display processing unit displays the preparation amount of each sample calculated by the preparation amount calculation unit on the display unit.

According to such a configuration, the preparation amount of each sample based on the specified ratio is calculated from the preparation amount of each sample when generating the buffer solution stored as the preparation information in the storage unit. A desired buffer solution can be generated by preparing the sample while confirming the amount of each sample calculated in this way on the display unit. In this case, since it is not necessary to newly store the preparation amount of each sample in the storage unit, the buffer solution can be generated by easily preparing each sample with a desired preparation amount. The ratio may be a ratio to the unit amount, or may be a ratio to the preparation amount of each sample when the buffer solution of the unit amount is generated.

In the storage unit, a preparation amount of each sample when a plurality of types of samples are prepared to generate a unit amount of a specific buffer solution may be stored as specific preparation information. In this case, the electronic balance may further include a buffer solution selection receiving unit that receives selection of the specific buffer solution or other buffer solutions. In addition, when the specific buffer solution is selected by the buffer solution selection receiving unit, the preparation amount calculation unit is specified by the specific preparation information stored in the storage unit and the ratio specification processing unit. The preparation amount of each sample may be calculated based on the ratio. As a result, for a specific buffer solution, it is not necessary to newly store the preparation amount of each sample for generating the buffer solution in the storage unit. Can be produced.
The storage unit may store reference blending information that serves as a reference when the ratio designation processing unit designates the ratio of each sample to be blended when generating a buffer solution other than the specific buffer solution. . In this case, when the buffer solution selection receiving unit selects a buffer solution other than the specific buffer solution, the preparation amount calculation unit is a ratio specified by the ratio specification processing unit based on the reference preparation information. Based on the above, the preparation amount of each sample may be calculated.

According to such a configuration, when a buffer solution other than a specific buffer solution is generated, the ratio of each sample can be specified based on the reference formulation information. Therefore, for all buffer solutions other than the specific buffer solution, it is not necessary to store the preparation amount of each sample for generating those buffer solutions in the storage unit, so the preparation information to be stored in the storage unit is reduced. Can do. As a result, it becomes easy to select the specific formulation information when generating the specific buffer solution, and the specific formulation information can be easily read from the storage unit.

The electronic balance may further include a pH input receiving unit that receives an input of the pH of the buffer solution to be generated. In this case, the ratio designation processing unit may designate the ratio based on the pH of the buffer solution whose input is received by the pH input receiving unit.

According to such a configuration, by inputting the pH of the buffer solution to be generated, the ratio to the preparation information is automatically calculated, and the preparation amount of each sample calculated based on the ratio is displayed on the display unit. The Therefore, a buffer solution having a desired pH can be easily generated by preparing the sample while confirming the preparation amount of each sample on the display unit.

The electronic balance may further include a concentration input receiving unit that receives an input of the concentration of the buffer solution to be generated. In this case, the ratio designation processing unit may designate the ratio based on the concentration of the buffer solution whose input is received by the concentration input receiving unit.

According to such a configuration, by inputting the concentration of the buffer solution to be generated, the ratio to the preparation information is automatically calculated, and the preparation amount of each sample calculated based on the ratio is displayed on the display unit. The Therefore, a buffer solution having a desired concentration can be easily generated by preparing the sample while confirming the preparation amount of each sample on the display unit.

The electronic balance may further include a type input receiving unit that receives an input of the type of buffer solution to be generated. In this case, the ratio designation processing unit may read formulation information corresponding to the type of the buffer solution that has been accepted by the type input accepting unit from the storage unit, and designate the ratio based on the formulation information. .

According to such a configuration, by inputting the type of buffer solution to be generated, each sample calculated from the storage unit is read out from the storage unit corresponding to the desired type of buffer solution, and calculated based on the formulation information Is displayed on the display unit. Therefore, a desired type of buffer solution can be easily generated by preparing the sample while confirming the preparation amount of each sample on the display unit.

The electronic balance may further include a generation amount input receiving unit that receives an input of the amount of the buffer solution to be generated. In this case, the ratio designation processing unit may designate the ratio based on the amount of the buffer solution whose input is received by the generation amount input receiving unit.

According to such a configuration, the ratio is automatically calculated by inputting the amount of the buffer solution to be generated, and the preparation amount of each sample calculated based on the ratio is displayed on the display unit. Therefore, a desired amount of buffer solution can be generated by preparing the sample while confirming the preparation amount of each sample on the display unit.

The electronic balance may further include a ratio input receiving unit that receives a ratio input. In this case, the ratio specification processing unit may specify a ratio when the preparation amount calculation unit calculates the preparation amount of each sample based on the ratio received by the ratio input reception unit.

According to such a configuration, by directly inputting the ratio, the preparation amount of each sample calculated based on the ratio is displayed on the display unit. Therefore, a desired amount of buffer solution can be generated by preparing the sample while confirming the preparation amount of each sample on the display unit.

The electronic balance may further include an allowable determination processing unit and an allowable range calculation unit. The tolerance determination processing unit determines whether or not the difference between the preparation amount of each sample calculated by the preparation amount calculation unit and the measured value of each sample is within an allowable range. The allowable range calculation unit calculates the allowable range based on the ratio designated by the ratio designation processing unit.

According to such a configuration, the allowable range of the measurement value when the sample is weighed is automatically calculated based on the specified ratio. Thereby, since an appropriate allowable range according to the specified ratio can be set, if each sample is prepared within the allowable range, the buffer solution can be generated with a more accurate preparation amount.

According to the present invention, since it is not necessary to newly store the preparation amount of each sample in the storage unit as preparation information, it is possible to easily prepare the buffer solution by preparing each sample with a desired preparation amount.

It is the block diagram which showed the structural example of the electronic balance which concerns on 1st Embodiment of this invention. It is the figure which showed an example of the display screen of the display part at the time of mix | blending a sample. It is the flowchart which showed an example of the process by the control part at the time of preparing a sample. It is the block diagram which showed the structural example of the electronic balance which concerns on 2nd Embodiment of this invention.

1. First Embodiment FIG. 1 is a block diagram showing a configuration example of an electronic balance according to a first embodiment of the present invention. The electronic balance according to the present embodiment includes a load detection unit 10, a control unit 20, a storage unit 30, a display unit 40, an operation unit 50, and the like.

The load detection unit 10 detects the load of the sample placed on the weighing pan (not shown). The load detection unit 10 is, for example, an electromagnetic type or a load cell type, and detects the load of the sample based on a change in the electrical signal when the sample is placed on the weighing pan. A detection signal in the load detection unit 10 is input to the control unit 20.

The control unit 20 includes a CPU (Central Processing Unit), for example. When the CPU executes a program, the control unit 20 includes a mass measurement unit 21, a display processing unit 22, a preparation amount calculation unit 23, a ratio designation processing unit 24, a generation amount input reception unit 25, a buffer solution selection reception unit 26, It functions as an allowable determination processing unit 27, an allowable range calculation unit 28, a pH input reception unit 291, a concentration input reception unit 292, a type input reception unit 293, and the like.

The mass measurement unit 21 measures the mass of the sample based on the load detected by the load detection unit 10. Specifically, the mass of the sample is calculated by converting the change amount of the electrical signal detected by the load detection unit 10 into mass.

The display processing unit 22 controls display on the display unit 40. The display unit 40 is configured by a liquid crystal display, for example. When the sample is weighed, the mass value of the sample measured by the mass measuring unit 21 is displayed on the display unit 40 as a measured value by the processing of the display processing unit 22.

In the present embodiment, when a buffer solution is generated by preparing a plurality of types of samples, the preparation amount of each sample is displayed on the display unit 40, and a desired buffer solution is generated by preparing while confirming the display. The mode that can be selected is selectable. In this mode, the preparation amount of each sample is displayed on the display unit 40 based on the preparation information (so-called “recipe”) stored in the storage unit 30.

In the storage unit 30, for a plurality of types of specific buffer solutions having a constant molar concentration (mM) and pH, the preparation amount of each sample when a unit amount (for example, 1 L) of each buffer solution is generated is prepared as preparation information ( As specific formulation information). That is, the specific preparation information is information on the preparation amount of each sample when a plurality of types of samples are prepared to generate a specific amount of a specific buffer solution. Specifically, specific formulation information as shown in the following (1) to (13) is stored in the storage unit 30, but these are only examples, and other specific formulation information is stored in the storage unit 30. May be. Further, the specific formulation information may be registered in advance in the storage unit 30, or may be arbitrarily added or changed by an operator.

(1) 100 mM phosphate (sodium) buffer solution pH = 2.1
Sodium dihydrogen phosphate dihydrate (MW = 156.01): 50 mmol (7.8 g)
Phosphoric acid (85%, 14.7 mol / L): 50 mmol (3.4 mL)
(2) 10 mM phosphate (sodium) buffer solution pH = 2.6
Sodium dihydrogen phosphate dihydrate (MW = 156.01): 5 mmol (0.78 g)
Phosphoric acid (85%, 14.7 mol / L): 5 mmol (0.34 mL)
(3) 50 mM phosphoric acid (sodium) buffer solution pH = 2.8
Sodium dihydrogen phosphate dihydrate (MW = 156.01): 40 mmol (6.24 g)
Phosphoric acid (85%, 14.7 mol / L): 10 mmol (0.68 mL)
(4) 100 mM phosphoric acid (sodium) buffer solution pH = 6.8
Sodium dihydrogen phosphate dihydrate (MW = 156.01): 50 mmol (7.8 g)
Disodium hydrogen phosphate dodecahydrate (MW = 358.14): 50 mmol (17.9 g)
(5) 10 mM phosphoric acid (sodium) buffer solution pH = 6.9
Sodium dihydrogen phosphate dihydrate (MW = 156.01): 5 mmol (0.78 g)
Disodium hydrogen phosphate dodecahydrate (MW = 358.14): 5 mmol (1.79 g)
(6) 20 mM citrate (sodium) buffer solution pH = 3.1
Citric acid monohydrate (MW = 210.14): 16.7 mmol (3.51 g)
Sodium citrate dihydrate (MW = 294.10): 3.3 mmol (0.97 g)
(7) 20 mM citrate (sodium) buffer solution pH = 4.6
Citric acid monohydrate (MW = 210.14): 10 mmol (2.1 g)
Sodium citrate dihydrate (MW = 294.10): 10 mmol (2.94 g)
(8) 10 mM tartaric acid (sodium) buffer solution pH = 2.9
Tartaric acid (MW = 150.09): 7.5 mmol (1.13 g)
Sodium tartrate dihydrate (MW = 230.08): 2.5 mmol (0.58 g)
(9) 10 mM tartaric acid (sodium) buffer solution pH = 4.2
Tartaric acid (MW = 150.09): 2.5 mmol (0.375 g)
Sodium tartrate dihydrate (MW = 230.08): 7.5 mmol (1.726 g)
(10) 20 mM (acetic acid) ethanolamine buffer solution pH = 9.6
Monoethanolamine (MW = 61.87, d = 1.018): 20 mmol (1.22 mL)
Acetic acid (glacial acetic acid, 17.4 mol / L): 10 mmol (0.575 mL)
(11) 100 mM acetic acid (sodium) buffer solution pH = 4.7
Acetic acid (glacial acetic acid, 17.4 mol / L): 50 mmol (2.87 mL)
Sodium acetate trihydrate (MW = 136.08): 50 mmol (6.80 g)
(12) 100 mM boric acid (potassium) buffer solution pH = 9.1
Boric acid (MW = 61.83): 100 mmol (6.18 g)
Potassium hydroxide (MW = 56.11): 50 mmol (2.81 g)
(13) 100 mM boric acid (sodium) buffer solution pH = 9.1
Boric acid (MW = 61.83): 100 mmol (6.18 g)
Sodium hydroxide (MW = 40.00): 50 mmol (2.00 g)

In the case of generating a buffer solution of the above unit amount (for example, 1 L), after preparing each sample using the specific preparation information stored in the storage unit 30 as it is, the desired buffer solution can be obtained simply by adding 1 L of water. Can be obtained. However, when a specific buffer solution having an amount different from the unit amount is generated, or when a buffer solution other than the specific buffer solution as described above is generated, the specific formulation information cannot be used as it is. Therefore, in such a case, the preparation amount calculation unit 23 calculates the preparation amount of each sample based on the specific preparation information or the reference preparation information stored in the storage unit 30.

Here, the reference blending information is blending information associated with buffer solutions other than the specific buffer solutions (for example, 13 types) as described above, and the ratio of each sample to be blended when generating the buffer solution. This is the blending information that serves as a reference when designating. The reference preparation information includes information necessary for calculating the preparation amount of each sample when the buffer solution is generated for each type of buffer solution. As the types of buffer solutions in which the reference formulation information is stored in the storage unit 30, for example, MES, HEPES, PIPES, and MOPS, in addition to the types of the above specific buffer solutions (phosphoric acid, citric acid, tartaric acid, acetic acid, boric acid) , Tris etc. are included. When creating a buffer solution other than the above-mentioned specific buffer solution, the type of the buffer solution is selected, and then the ratio of each sample to be prepared is determined by inputting the pH, concentration, type, etc. Calculated based on information.

As described above, in this embodiment, when the specific buffer solution is generated and when other buffer solutions are generated, each sample is based on different preparation information (specific preparation information or reference preparation information). The blending amount is calculated. When generating the buffer solution, the operator operates the operation unit 50 to select the specific buffer solution or other buffer solution, and the buffer solution selection receiving unit 26 receives the selection. . However, the configuration is not limited to the specific buffer solution or other buffer solution, but may be configured to select only the specific buffer solution, or other than the specific buffer solution. The structure which can select only a buffer solution may be sufficient.

The selection of the buffer solution may be configured such that, for example, based on the operation of the operation unit 50, options for the specific buffer solution (for example, 13 types) are sequentially displayed on the display unit 40, and any one of them can be selected. . Thereby, since it can read easily from the memory | storage part 30 about the formulation information of the specific buffer solution used frequently, it takes time to select the formulation information of a desired buffer solution, or the formulation information It is possible to prevent the user from reaching the location. On the other hand, the buffer solution other than the specific buffer solution may be selected by an option (for example, an option of free setting) displayed on the display unit 40 following the option of the specific buffer solution. Alternatively, a configuration in which the display screen of the display unit 40 is switched with a switching button or the like may be selected.

The ratio designation processing unit 24 designates the ratio based on the blending information stored in the storage unit 30, and the blending amount calculation unit 23 calculates the blending amount of each sample based on the ratio. That is, the preparation amount calculation unit 23 calculates the preparation amount of each sample based on the preparation information stored in the storage unit 30 and the ratio specified by the ratio specification processing unit 24.

Specifically, when any one of the specific buffer solutions is selected by the buffer solution selection receiving unit 26, the specific formulation information stored in the storage unit 30 and the ratio designation processing unit 24 are designated. Based on the ratio, the preparation amount calculation unit 23 calculates the preparation amount of each sample. On the other hand, when a buffer solution other than the specific buffer solution is selected by the buffer solution selection receiving unit 26, the buffer solution is prepared when the buffer solution is generated based on the reference formulation information stored in the storage unit 30. The ratio of each sample to be performed is designated by the ratio designation processing unit 24, and the preparation amount calculation unit 23 calculates the preparation amount of each sample based on the ratio.

The generation amount input receiving unit 25 performs a process of receiving the input when the operator inputs the amount of the buffer solution to be generated using the operation unit 50. The ratio designation processing unit 24 designates the ratio based on the amount of the buffer solution that has been accepted by the generation amount input acceptance unit 25.

For example, when a 20 mM citrate (sodium) buffer solution is generated at pH = 3.1, it is assumed that the above-described specific formulation information (6) is selected and the generation amount is input as 0.7 L. In this case, based on the amount (generation amount) of the buffer solution whose input is received by the generation amount input receiving unit 25, the ratio designation processing unit 24 calculates the ratio of the generation amount (0.7L) to the unit amount (1L). “0.7” is specified.

Then, the preparation amount calculation unit 23 calculates the preparation amount of each sample based on the specific preparation information (6) stored in the storage unit 30 and the designated ratio “0.7”. Specifically, the amount of citric acid monohydrate (MW = 210.14) is obtained by multiplying the preparation amount of each sample in the specific preparation information (6) by the ratio “0.7”. The blending amount is calculated to be 2.457 g, and the blending amount of sodium citrate dihydrate (MW = 294.10) is 0.679 g.

In the above example, the case where the specific buffer solution is generated using the specific formulation information has been described. However, when the buffer solution other than the specific buffer solution is generated using the reference formulation information, the buffer is similarly used. By inputting the production amount of the solution, the ratio according to the production amount is designated by the ratio designation processing unit 24.

When a buffer solution other than a specific buffer solution is generated using the reference formulation information, not only the generated amount of the buffer solution but also the pH, concentration and type of the buffer solution are input by operating the operation unit 50. . When the operator inputs the pH of the buffer solution to be generated using the operation unit 50, the pH input receiving unit 291 performs a process of receiving the input. When the operator inputs the concentration (mM) of the buffer solution to be generated using the operation unit 50, the concentration input receiving unit 292 performs a process of receiving the input. The type input receiving unit 293 performs a process of receiving an input when the operator inputs the type of buffer solution to be generated using the operation unit 50. Such input of pH, concentration and type may be arbitrarily input, or may be selected and input from a plurality of options.

The ratio is designated by the ratio designation processing unit 24 based on the pH, concentration and type of the buffer solution input in this way. Specifically, reference formulation information corresponding to the type of the input buffer solution is read from the storage unit 30, and based on the reference formulation information and the pH and concentration of the input buffer solution, the ratio designation processing unit The ratio is designated by 24. In what ratio each sample is prepared, the input pH and concentration can be determined using a known calculation formula (for example, “Phosphate Buffer Calculator” <http://clymer.altervista.org/ buffers / phos2.html>, "Buffer creation support tool" <http://www.ls.toyaku.ac.jp/~bioinfo/bioinformatics/cgi-bin/buffer_calc.cgi>).

The display processing unit 22 causes the display unit 40 to display the preparation amount of each sample calculated by the preparation amount calculation unit 23. Therefore, the operator can generate a desired buffer solution by preparing the sample while confirming the calculated preparation amount of each sample on the display unit 40. In this case, since it is not necessary to newly store the preparation amount of each sample in the storage unit 30 as preparation information, each sample can be easily prepared with a desired preparation amount to generate a buffer solution.

In particular, in this embodiment, if the amount of the buffer solution to be generated is input, the ratio of the unit amount to the buffer solution is automatically calculated, and the preparation amount of each sample calculated based on the ratio is displayed on the display unit 40. Is displayed. Therefore, a desired amount of buffer solution can be generated by preparing the sample while confirming the preparation amount of each sample on the display unit 40.

In addition, when generating a buffer solution other than a specific buffer solution, if the pH, concentration and type of the buffer solution to be generated are input, a ratio to the reference formulation information is automatically calculated, and based on the ratio. The calculated preparation amount of each sample is displayed on the display unit 40. Therefore, if the amount of each sample is mixed while confirming on the display unit 40, a buffer solution having a desired pH, concentration and type can be generated. However, the configuration may be such that at least one is input instead of all of the amount, pH, concentration and type of the buffer solution to be generated.

The tolerance determination processing unit 27 determines whether or not the difference between the preparation amount of each sample calculated by the preparation amount calculation unit 23 and the measured value of the sample is within an allowable range. That is, the value displayed on the display unit 40 as the preparation amount of each sample is compared with the measured value of each sample when actually measured, and it is determined whether or not the difference is within an allowable range. .

The allowable range may be a fixed range, but in the present embodiment, the allowable range is changed according to the ratio designated by the ratio designation processing unit 24. The allowable range calculation unit 28 calculates the allowable range based on the ratio designated by the ratio designation processing unit 24. For example, when the allowable range for producing a unit amount of buffer solution is 0.1 g, and the ratio “0.7” is specified as in the above example, the ratio “0” is set to 0.1 g. 0.07 g, which is a value obtained by multiplying “.7”, is calculated as the allowable range.

As described above, in this embodiment, the allowable range of the measurement value when the sample is weighed is automatically calculated based on the designated ratio. Thereby, since an appropriate allowable range according to the specified ratio can be set, if each sample is prepared within the allowable range, the buffer solution can be generated with a more accurate preparation amount.

FIG. 2 is a diagram showing an example of a display screen of the display unit 40 when a sample is prepared. In this example, the measurement value 41, the sample name 42, the preparation amount 43, the pass / fail determination information 44, the next key 45, and the like are displayed on the display unit 40.

In the area of the measured value 41, the mass (measured value) of the sample measured by the mass measuring unit 21 is displayed. In the area of the sample name 42, the name of each sample to be weighed is displayed. Further, in the region of the preparation amount 43, the preparation amount of each sample calculated by the preparation amount calculation unit 23 is displayed. In the area of the pass / fail determination information 44, the determination result by the allowance determination processing unit 27 is displayed. The next key 45 is selected when the process at the time of preparation is advanced.

For example, the case where the above-described specific formulation information (6) is selected and the generation amount is input as 0.7 L will be described. First, “citric acid monohydrate” is displayed in the region of the sample name 42. Then, “2.457 g” is displayed in the area of the preparation amount 43. Thereafter, the operator measures citric acid monohydrate on the weighing pan while confirming the display of the preparation amount 43. At this time, the measured value of the citric acid monohydrate is displayed in the area of the measured value 41.

The ratio of the measurement value 41 to the preparation amount 43 is displayed in the area of the pass / fail determination information 44. Specifically, a bar graph (not shown) that extends upward as the measured value 41 increases is displayed in the area of the pass / fail judgment information 44, and if the upper end of the bar graph is within the allowable range R, “ By displaying the characters “OK”, it is displayed that the difference between the measured value 41 of citric acid monohydrate and the preparation amount 43 is within the allowable range R.

After the measurement of citric acid monohydrate in this way, when the operator selects the next key 45, “Sodium citrate dihydrate” is displayed in the area of the sample name 42, and the amount of preparation 43 “0.679 g” is displayed in the area of. Thereafter, the operator performs measurement by placing sodium citrate dihydrate on a weighing pan while confirming the display of the preparation amount 43. At this time, the measured value of the measured sodium citrate dihydrate is displayed in the area of the measured value 41. If the ratio of the measured value 41 to the blended amount 43 is displayed as a bar graph (not shown) in the area of the acceptance / rejection determination information 44 and the upper end of the bar graph is within the allowable range R, the character “OK” is displayed. By being displayed, it is displayed that the difference between the measured value 41 of sodium citrate dihydrate and the preparation amount 43 is within the allowable range R.

After the measurement of sodium citrate dihydrate in this way, when the operator selects the next key 45, the sum of the measured values of citric acid monohydrate and sodium citrate dihydrate (total) Value) is displayed in the area of the measured value 41.

FIG. 3 is a flowchart showing an example of processing by the control unit 20 when preparing a sample. When preparing a sample, first, the operator operates the operation unit 50 to select a specific buffer solution or another buffer solution (Yes in step S101).

Thereafter, setting input for the buffer solution to be generated is performed using the operation unit 50. Specifically, when a specific buffer solution is selected, the production amount of the buffer solution is input. On the other hand, when a buffer solution other than a specific buffer solution is selected, the pH, concentration and type of the buffer solution, and the amount of the buffer solution produced are input. When such setting input is performed (Yes in step S102), the ratio designation processing unit 24 designates the ratio based on the inputted value (step S103). Then, based on the specified ratio, the preparation amount calculation unit 23 calculates the preparation amount of each sample, and the allowable range calculation unit 28 calculates the allowable range R of the measurement value of each sample with respect to the preparation amount of each sample ( Step S104).

In this case, the preparation amount of each sample calculated by the preparation amount calculation unit 23 is displayed in the region of the preparation amount 43 of the display unit 40 (step S105). On the other hand, when the setting input for the buffer solution to be generated is not performed (No in step S102), that is, a specific buffer solution is selected, and the selected formulation information (specific formulation information) is used as it is to buffer the unit amount. When the solution is generated, the information on the preparation amount of each sample included in the preparation information is displayed as it is in the preparation amount 43 area of the display unit 40 (step S105).

After that, the operator performs measurement by placing the sample on the weighing pan while confirming the display of the preparation amount 43. When the operator selects the next key 45 and finishes weighing the sample (Yes in step S106), if the measured value of the sample is within the allowable range R with respect to the preparation amount (Yes in step S107). ) Move to the next sample measurement. When the processing of steps S105 to S108 is repeated in this way and the weighing of all the samples is completed (Yes in step S108), the total sum (total value) of the weighing values of each sample is displayed on the display unit 40 ( Step S109).

In the present embodiment, the configuration in which the control unit 20 functions as the generation amount input reception unit 25, the pH input reception unit 291, the concentration input reception unit 292, and the type input reception unit 293 has been described. However, the configuration is not limited to this, and a configuration in which at least one of the generation amount input receiving unit 25, the pH input receiving unit 291, the concentration input receiving unit 292, and the type input receiving unit 293 is omitted may be used.

2. Second Embodiment FIG. 4 is a block diagram showing a configuration example of an electronic balance according to a second embodiment of the present invention. In the first embodiment, the configuration in which the ratio designation processing unit 24 designates the ratio based on the amount of the buffer solution that has been accepted by the generation amount input acceptance unit 25 has been described. In contrast, the present embodiment is different in that the ratio designation processing unit 24 designates the ratio based on the ratio accepted by the ratio input accepting unit 29. Except for this point, since the configuration of the electronic balance according to the present embodiment has the same configuration as that of the first embodiment, the same reference numerals are given to the same configuration, and detailed description thereof is omitted. .

In this embodiment, when the operator inputs a ratio using the operation unit 50, the ratio input reception unit 29 receives the input of the ratio. The ratio designation processing unit 24 designates a ratio when the preparation amount calculation unit 23 calculates the preparation amount of each sample based on the ratio received by the ratio input reception unit 29. Specifically, when a specific buffer solution is generated using specific formulation information, the ratio designation processing unit 24 sets the ratio of the input received by the ratio input receiving unit 29 to the ratio of the unit amount (for example, 1 L). Specify as. Thereby, the preparation amount calculation part 23 will calculate the preparation amount of each sample using the input ratio as it is.

For example, when a 20 mM citrate (sodium) buffer solution is generated at pH = 3.1, it is assumed that the specific formulation information (6) described above is selected and the ratio “0.7” is input. In this case, the ratio “0.7” received by the ratio input receiving unit 29 is designated by the ratio designation processing unit 24 as the ratio to the unit quantity.

Then, the preparation amount calculation unit 23 calculates the preparation amount of each sample based on the specific preparation information (6) stored in the storage unit 30 and the designated ratio “0.7”. Specifically, the amount of citric acid monohydrate (MW = 210.14) is obtained by multiplying the preparation amount of each sample in the specific preparation information (6) by the ratio “0.7”. The blending amount is calculated to be 2.457 g, and the blending amount of sodium citrate dihydrate (MW = 294.10) is 0.679 g. These preparation amounts are displayed on the display unit 40 when the sample is prepared.

On the other hand, when a buffer solution other than the specific buffer solution is generated using the reference formulation information, the ratio designation processing unit 24 uses the ratio received by the ratio input receiving unit 29 and the pH input receiving unit 291. The ratio is determined based on the pH of the buffer solution accepted by the input, the concentration of the buffer solution accepted by the concentration input accepting unit 292, and the type of buffer solution accepted by the type input accepting unit 293. specify.

Thus, in this embodiment, by directly inputting the ratio, the preparation amount of each sample calculated based on the ratio is displayed on the display unit 40. Therefore, a desired amount of buffer solution can be generated by preparing the sample while confirming the preparation amount of each sample on the display unit 40.

DESCRIPTION OF SYMBOLS 10 Load detection part 20 Control part 21 Mass measurement part 22 Display processing part 23 Preparation amount calculation part 24 Ratio designation | designated processing part 25 Generation amount input reception part 26 Buffer solution selection reception part 291 pH input reception part 292 Concentration input reception part 293 Type input Acceptance unit 27 Acceptance determination processing unit 28 Acceptable range calculation unit 29 Ratio input acceptance unit 30 Storage unit 40 Display unit 41 Weighing value 42 Sample name 43 Preparation amount 44 Acceptance determination information 45 Next key 50 Operation unit

Claims

An electronic balance for weighing a sample and displaying the measured value on a display unit,
A storage unit for storing the amount of each sample when preparing a buffer solution by preparing a plurality of types of samples as preparation information;
A ratio specification processing unit for specifying a ratio;
Based on the formulation information stored in the storage unit and the ratio designated by the ratio designation processing unit, a formulation amount calculation unit that calculates the formulation amount of each sample;
An electronic balance, comprising: a display processing unit that displays the preparation amount of each sample calculated by the preparation amount calculation unit on the display unit.
In the storage unit, a preparation amount of each sample when a plurality of types of samples are prepared to generate a unit amount of a specific buffer solution is stored as specific preparation information,
A buffer solution selection receiving unit that receives selection of the specific buffer solution or other buffer solution;
When the specific buffer solution is selected by the buffer solution selection receiving unit, the preparation amount calculation unit is specific formulation information stored in the storage unit, and the ratio specified by the ratio specification processing unit The electronic balance according to claim 1, wherein the preparation amount of each sample is calculated based on the above.
The storage unit stores reference blending information that serves as a reference when the ratio designation processing unit designates the ratio of each sample to be blended when generating a buffer solution other than the specific buffer solution.
When the buffer solution selection receiving unit selects a buffer solution other than the specific buffer solution, the preparation amount calculation unit is based on the ratio specified by the ratio specification processing unit based on the reference preparation information. The electronic balance according to claim 2, wherein the blending amount of each sample is calculated.
A pH input receiving unit for receiving an input of pH of the buffer solution to be generated;
The electronic balance according to any one of claims 1 to 3, wherein the ratio designation processing unit designates a ratio based on the pH of the buffer solution received by the pH input receiving unit.
A concentration input receiving unit for receiving an input of the concentration of the buffer solution to be generated;
The electronic balance according to any one of claims 1 to 3, wherein the ratio designation processing unit designates a ratio based on the concentration of the buffer solution received by the concentration input receiving unit.
A type input receiving unit that receives an input of the type of buffer solution to be generated;
The ratio designation processing unit reads formulation information corresponding to the type of buffer solution that has been accepted by the type input accepting unit from the storage unit, and designates the ratio based on the formulation information. Item 4. The electronic balance according to any one of Items 1 to 3.
A generation amount input receiving unit for receiving an input of the amount of the buffer solution to be generated;
The electronic balance according to any one of claims 1 to 3, wherein the ratio designation processing unit designates a ratio based on an amount of the buffer solution received by the generation amount input receiving unit. .
It further includes a ratio input receiving unit that receives an input of the ratio,
The ratio specification processing unit specifies a ratio at which the preparation amount calculation unit calculates the preparation amount of each sample based on the ratio received by the ratio input reception unit. The electronic balance according to any one of 1 to 3.
An acceptance determination processing unit for determining whether or not the difference between the preparation amount of each sample calculated by the preparation amount calculation unit and the measured value of each sample is within an allowable range;
The electronic balance according to any one of claims 1 to 3, further comprising an allowable range calculation unit that calculates the allowable range based on a ratio specified by the ratio specification processing unit.