JPS62185161A - Apparatus for measuring electrolyte - Google Patents

Abstract

PURPOSE:To attain to enhance the preciseness and accuracy of measuring data, in an apparatus equipped with an ion electrode detecting the concn. of the ion in serum etc. and a flow passage supplying a liquid to be examined to said electrode and discharging the same therefrom, by providing a pressure sensor to the flow passage. CONSTITUTION:A liquid to be examined is supplied to an ion electrode 1 for detecting the concn. of the ion in the liquid to be examined from a storage tank 3 through a pump 4 and discharged therefrom. A pressure sensor 5 is provided to the flow passage 2 of the liquid to be examinated. The ion electrode 1 is constituted, for example, by arranging not only a plurality of ion selective electrode rods 21 to a block 20, through which the liquid to be examined passes but also an ion electrode part 23 in the flow passage 22 within the block 20 so as to expose the same and the electrode rods 21 are directly contacted with the connectors 16 of a thermostatic block 15 to take out output potential. The pressure sensor 5 detects the change in pressure caused by the disturbance of the flow of the liquid to be examined due to the partial leak or clogging of the flow passage 2 and detects the state of flow or the abnormality of the flow passage to display the same on a display device 24 through an operation part 19.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to an ion electrode for detecting the ion concentration of a test liquid (for example, serum), and a flow path for supplying and discharging the test liquid to the ion electrode. The present invention relates to an electrolyte measuring device comprising:

[Technical background of the invention and its problems] In general, in this type of electrolyte measurement device, a part of the flow path through which the test liquid flows is formed by the electrode surface of the ion electrode, so the flow path resistance is relatively large. , the "flow" of the test liquid flowing through the channel may become uneven.

This type of electrolyte measuring device usually reads the potential output from the ion electrode after a certain period of time Δt (see Figure 5) has elapsed after aspirating the test liquid and converts it into the concentration of the test liquid. As the "flow" state of the ion electrode changes, the response characteristics of the ion electrode change as shown in Figure 5, which increases the accuracy of the data obtained.

It is known to have a negative effect on accuracy.

However, conventional devices do not take into account the adverse effects on data caused by changes in the "flow" of the test liquid, and as a result, there is a problem that the obtained measurement data lacks precision and accuracy. Ta.

[Object of the Invention] The present invention has been made in view of the above circumstances, and the yI? An object of the present invention is to provide an electrolyte measuring device that can improve J density and accuracy.

[Summary of the Invention] The outline of the present invention for achieving the above object is to provide an ion electrode for detecting the ion S degree of a test liquid, and a flow path for supplying and discharging the test liquid to the ion electrode. In the electrolyte measuring device, six pressure sensors are installed in the flow path.

[Embodiments of the Invention] Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of the apparatus of the present invention.

1 is an ion electrode that detects the ion energy of the test liquid, 2 is a flow path for supplying and discharging the test liquid to the ion electrode 1, 3 is a storage tank for the test liquid, 4 is a pump, and 5 is a flow path This is the pressure horn sensor installed in 2.

For example, as shown in FIG. 2, the ion electrode 1 includes a plurality of ion-selective electrode rods 2 in a blower 20 through which a test liquid flows.
1 into the flow path 22 in the block 20 and the ion electrode part 23
or the basic structure is as shown in FIG. P with a flow path 12 for the test liquid formed in the part.
A plurality of sensitive membranes 10 are inserted into insertion holes 14 provided on the side of a base body 13 made of an insulator such as VC, and the sensitive membranes 10 are made to face the flow path 12 of the test liquid. Reference numeral 15 denotes a thermostatic block made of a material that is an electrical insulator and has good thermal conductivity, such as ceramic. As shown in FIG.
) are provided with connectors 16 that fit with the respective connectors 16,
This connector 16 comes into direct contact with the metal rod (21 or 11) and extracts the output potential from the metal rod. Connectors 16 are connected to amplifier 1 by lead wires 17, respectively.
8 to the arithmetic unit 19, and the connector 16
The output potential taken out is amplified by an amplifier 18, and then converted into concentration by an interference section 19, which is displayed on a display section 24 as measurement data. Furthermore, as shown in FIG. 6, the constant temperature block 15 is provided with a heater 25 and a temperature sensor 26 inserted or buried in the block 15 to maintain the constant temperature. By doing so, the metal rod (21 or 11) of the ion electrode is directly kept at a constant temperature from the connector 16, and the constant temperature state of the ion electrode is maintained to eliminate the adverse effect on the output potential due to temperature change.

The pressure sensor 5 is attached to the flow path on the test liquid discharge side of the ion electrode 1, and detects changes in pressure caused by disturbances in the "flow" of the test liquid due to leakage or clogging in a portion of the flow path. By detecting changes in the pressure value or the time taken until the pressure returns to a steady state, it is possible to detect an abnormality in the "flow" or in the flow path. As an example of the detection, FIGS. 4(a) and 4(b) show a pressure change in a normal state and a pressure change in an abnormal state, respectively. As is clear from the figure, when the pressure is abnormal, the pressure change ΔP' is larger than the pressure change ΔP during normal conditions, and the time Δt' required for the pressure to return to the steady state is longer than that under normal conditions. Since the time is longer than the time Δt, it is possible to detect an abnormality in one flow or more than one flow path.

Now, in the above-described device, the pump 4 supplies and discharges the test liquid from the storage tank 3 to the ion electrode 4 1 and causes it to flow, and the output potential from the ion electrode 1 is input to the amplifier 18 . The measured data can be displayed on the display section 24 via the calculation section 19, and abnormalities in the "flow" of the body fluid to be examined can be monitored using the pressure sensor 5. Therefore, "flow"
When an abnormality is detected by the pressure sensor 5, it can be immediately determined that the measured data obtained at that time is abnormal, and the precision and accuracy of the measured data can be checked by, for example, attaching an abnormal value mark to the abnormal data. It is possible to improve the degree of The pressure sensor 5 may be monitored and data checked manually, or the pressure sensor 5 may be automatically checked by connecting the pressure sensor 5 to the calculation unit 19 as shown by the broken line in FIG. It may also be displayed in .

Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the above embodiment, and can be modified as appropriate within the scope of the present invention.

For example, the constant temperature block in the above embodiment is not necessarily provided, and the metal rod of the ion electrode may be directly connected to the amplifier 18. However, if a constant temperature block is installed,
It is possible to maintain a constant temperature state of the ion electrode more reliably than other constant temperature means, and therefore, together with the pressure sensor described above, it is possible to further improve the precision of measurement data.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to monitor the flow of the test liquid using a pressure sensor, and it is possible to associate abnormality in the flow with measurement data, thereby making it possible to check abnormal data. Therefore, the precision and accuracy of measurement data can be improved. Moreover, since the pressure sensor can also detect abnormalities in the flow path, this can also be used as information for maintenance.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the device of the present invention, FIGS. 2 and 3 are sectional views of the ion electrode, and FIG. 4(a). (b) is a drawing showing an example of detection by a pressure sensor, respectively;
FIG. 5 is a drawing showing the response characteristics of the ion electrode, and FIG. 6 is a perspective view showing the ion electrode and the constant temperature block. 1... Ion electrode, 2... Channel, 5... Pressure sensor. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] An electrolyte measuring device comprising an ion electrode for detecting the ion concentration of a test liquid and a flow path for supplying and discharging the test liquid to the ion electrode, characterized in that a pressure sensor is provided in the flow path. Electrolyte measuring device.