KR20150134533A - Selective Ion Meter For Test Strip - Google Patents

Abstract

The present invention relates to a selective ionometer using test paper, capable of being free from restraint on properties of samples and external conditions by using a method of absorbing the sample and easily managing a measurement body by performing one-time measurement and intermittent measurement by an individual tip. The selective ionometer includes: a body unit calculating and analyzing a measurement signal and displaying a numerical value; an insertion groove having a positive pole and a negative pole formed on one side of the body unit; and a measurement tip having a first pole and a second pole corresponding to the positive pole and the negative pole by being inserted into the insertion groove. When the first pole and the second pole are individually connected to the positive pole and the negative pole since the measurement tip is inserted into the insertion groove, the sample is absorbed by the measurement tip to perform the measurement through a first electrode and the positive pole and a second electrode and the negative pole in a conductivity method. Since only liquid of the sample is absorbed and measured by the each measurement tip, an accurate measurement value can be obtained by not being influenced by a floating matter contained in the sample, foreign substances, a solid body, and temperature.

Description

{Selective Ion Meter For Test Strip}

[0001] The present invention relates to a selective ion meter, and more particularly, to a selective ion meter which uses a conductivity meter to absorb a sample using a measuring tip, .

Generally, a sensor is also called a sensing element, and refers to a device that senses changes in physical and chemical struc- ture. If the sensors that are currently developed are classified, they are classified into physical sensors for measuring physical quantities and chemical sensors for chemical measurement can do.

Various analytical methods have been developed to quantify and quantify the types and structures of various chemical substances included in unknown samples by applying such sensor technology. Recently, various analytical methods have been developed for analyzing specific chemical substances to be analyzed Methods are being developed that are capable of accurately analyzing very small samples with good selectivity.

In particular, as the need to analyze samples in a precise and short time for process automation, quality control, medical analysis, environmental sample analysis, etc. is growing, interest in developing methods and devices for easily analyzing chemical substances .

Most of the substances in nature are neutrals, but atoms or molecules are excessively retained or lost in electrons, so they are surrounded by water or other solvents and exist in the form of ion or ion (Ion) in the form of positive or negative ions .

The most widely used methods for measuring the ion are ion chromatography, atomic absorption or atomic emission, potentiometry using an ion selective electrode, Conductometry using conductivity.

Among them, ion chromatography and spectroscopic methods are expensive, and there is a disadvantage that they must be used after pre-treatment. However, electrochemical methods such as the potential difference method and the conductivity method, This method is simple and has a short response time within a few seconds. It is also easy to mass-analyze and unlike the spectroscopic analysis method, since it is not affected by the turbidity of the sample, the preprocessing step of the sample is not necessary, The price is lower than other analytical instruments.

On the other hand, generally, the sample must be collected and transported to a place where the analyzer is located. However, there is a problem that the sample is deteriorated due to contamination of the sample during the movement process or delay of the measurement time.

In order to solve such a problem, field measurement must be performed immediately. The high price of the analyzer and the large volume that it can not carry are obstacles to the direct analysis in the field.

In other words, in order to make analytical instruments capable of on-site measurement universal, it is necessary to downsize analytical instruments and reduce their prices.

Among electrochemical analysis apparatuses, in particular, conductivity measurement apparatuses are advantageous in that they can be downsized and are easy to mass-produce, leading to cost reduction. In addition, since the electrode can be miniaturized, it is possible to analyze even a small amount of sample.

Therefore, the electrochemical method, in particular, the conductivity measuring apparatus by the conductivity method can be downsized and the price can be reduced, and is suitable for on-site measurement as mentioned above.

This method of conductivity analysis is widely used not only in water quality analysis but also in process control and environmental analysis in food chemistry and industrial chemistry.

The most common ions in everyday life are hydrogen ions (H +) which determine the acidity and alkalinity, heavy metal ions (Pb2 +, Cd2 +, Cu2 +, etc.), and various alkali ions (Na +, K +, Ca2 +, Mg2 + Ionic groups (NH4 +, NO3-, SO42-, etc.), which are highly required for measurement, are present.

Particularly, the salt composed of Na + and Cl- ions is contained in a large amount in the food to be ingested daily, and therefore, the salt intake of the food should be controlled in the case of hypertension patients or chronic renal failure patients.

In addition, the average daily intake of salt in Korea is about 20mg, which is more than twice the intake of westerners, which causes the incidence of diseases such as hypertension to increase.

Therefore, it is very important to control the amount of salt intake as food for not only hypertensive patients but also the general public.

However, in the conventional commercially available portable salinity measuring apparatus, most of the measurement values are inaccurate, expensive, and depend on imports.

In order to solve such a problem, Korean Utility Model Registration No. 20-308415 has been proposed.

The conventional portable salinity measuring device includes a step of putting two electrodes into a sample and passing current therethrough, a step of obtaining a resistance value of a sample by the Ohm's law as in a metal conductor, A step of converting the frequency into a frequency using a capacitor value, and a step of calculating a salinity concentration in the sample at the frequency.

The conventional salinity meter proposed by another technique as shown in FIG. 1A is a registration number No. 10-0912714, which is a measurement part formed on a bottom surface of a receiving space for accommodating a sample and extending to one side of a receiving part formed with a mounting hole, Wow; A + electrode is inserted from the center of the mounting hole of the measurement part, a first insulator which surrounds the + electrode is inserted, an electrode which surrounds the periphery of the first insulator is inserted, a periphery of the electrode is covered, And an electrode part formed of a second insulator, wherein the use and measurement according to the application can be performed simultaneously; And the electrode unit is formed by using an insert injection method so as to be inserted into the installation hole of the measurement unit and to be aligned with the surface of the accommodation space without bumps or sinks.

In addition, as shown in FIG. 1B, a conventional portable salty-taste sensor proposed by another technique is a registration number No. 10-1047964, in which a pressing part is formed on the front surface, a through hole is formed on one side of the pressing part, and a clip fixing part is formed on the back side A hollow body for detachably attaching the battery cover to one side of the clip fixing part; A clip which is once coupled to the clip fixing portion of the body and whose other end is fitted to a garment, a bag or the like; A circuit board built in the body and having a button formed to face the pushing part and having a display part facing the through hole; A battery embedded in the inner body of the battery cover and connected to the circuit board; And a salty taste measuring sensor hole is formed in the protrusion so as to be connected to the circuit board. The salty taste measuring sensor hole is formed in the recess so as to be connected to the circuit board. A cell block having a temperature sensor hole formed therein; A salty taste measuring sensor inserted into the salty taste measuring sensor hole of the cell block and having one end connected to the circuit board and the other end contacting the sample to measure the salty taste; A temperature sensor inserted into the temperature sensor hole of the cell block and having one end connected to the circuit board and the other end exposed to the outside of the depression of the cell block so that the end directly contacts the sample; An on / off switch installed at an end of the body opposite to the cell block, connected to the circuit board and the battery, and having an end protruding outside the end of the body; A light emission lamp provided on one side of the on / off switch and connected to the circuit board; Off switch when the switch is connected to one end of the on / off switch side body or is coupled to the cell block and when the switch is connected to one end of the on / off switch side body, the on / And a body cover having an operation piece formed therein.

As shown in FIG. 1C, the conventional salinity measuring instrument proposed by another technique is a registration number No. 10-1030302, in which a plurality of pressing portions are formed on the outer surface, and a plurality of pressing portions are formed on one side of the pressing portion, A hollow body having a hole formed therein and having a first male screw portion and a second male screw portion at both ends, respectively; A circuit board embedded in the body and having buttons formed to face the pushing part and having a display part facing the through hole; A battery cap having a female screw portion to be fastened to a first male thread portion of the body and having a hook on an outer side thereof; A battery built in the battery cap and connected to the circuit board; A flange is formed on one end of the body so as to be supported by the corresponding end of the body and a cutout groove is formed on the other end of the body, A cell block having two electrode holes formed therebetween for connecting the two electrode holes, one end of which is connected to the cutout groove and the other end of which is connected to the circuit board; Electrodes that are inserted into two electrode holes of the cell block, one end of which is connected to the circuit board, and the other end of which is contained in the sample to measure salinity; A temperature sensor inserted into the temperature sensor hole of the cell block and having one end connected to the circuit board and the other end exposed to the cutout so that the end directly contacts the sample; And a joint fastened to the second male threaded portion of the body to couple the cell block to the body.

In addition, as shown in FIG. 1D, the conventional electronic salinometer proposed by another technique is a registration number No. 10-1105022, which is located in a measuring part in contact with a measurement object and includes a pair of sensor pins for applying a voltage to a measurement object; A temperature sensor for sensing temperature; A salinity measuring unit for measuring the salinity of the object to be measured; A temperature measuring unit for measuring a temperature of the measurement object; A temperature corrector for correcting the measured temperature to an actual temperature of the measurement object; A room temperature salinity conversion unit for converting a temperature corrected by the temperature correction unit and a measured value of the salinity measuring unit into a room temperature salinity value according to a control signal; A button operation unit for receiving a user operation; A display unit for displaying temperature and room temperature salinity; And a controller for receiving the salinity value and controlling the display unit to display the temperature and the room temperature salinity.

In addition, as shown in FIG. 1E, the conventional cooking saline meter proposed by another technique is a registration number No. 10-0368871, in which a measuring current is supplied to a salinity sensor and a temperature sensor, and a feedback current is detected. The LCD module displays the numerical salinity or sensory salinity and the temperature, changes the mode change and the salinity conversion control value of the sensory salinity, and the microcomputer with EEPROM, working RAM, A / D converter and I / A salinity sensor for receiving a measurement current provided by the microcomputer through the port A1 and providing a feedback current to the port d1; a temperature sensor for receiving a measurement current provided by the microcomputer through the port A2 and providing a feedback current at the port d2; A power supply device that uses a battery as a current source and supplies a DC drive current to the microcomputer for a predetermined time when a switch signal is generated; 1, a mode switch for indicating a drive mode to the microcomputer as a switch state value s2, and a salinity conversion adjustment value variable of a mode variable, a switch flag variable, and a sensory salinity are referred to by a microcomputer, Displays the information for dialog with the user, such as an EEPROM that allows the microcomputer to update the values thereof, and a microcomputer that transmits data to indicate the drive mode, As an LCD module for display.

However, in the conventional portable saline meter, since two electrodes are protruded, a foreign substance such as a mackerel contained in an aqueous solution of food is located between the two electrodes when the sample is measured, so that the conductivity is lowered and accurate measurement values are not calculated In addition, there is a problem that foreign matter is inserted or deposited on the protruding surface, which makes washing difficult.

In addition, the conventional portable salinity measuring instrument has a small length and small size, which makes it portable, but has a problem in that it is limited by the depth of the sample.

In the conventional portable salinity measuring device, the measuring rod is divided into upper and lower cases and the surface to be bonded is manufactured by heat fusion to prevent penetration of the sample. However, if the measurement is repeated by repeatedly measuring the sample in a high temperature sample, There is a problem that the sample is infiltrated into the inside of the measuring rod to cause a failure.

In addition, the conventional portable salinity measuring apparatus has a problem that the measured value changes due to the bubbles generated when the sample boils when measuring the sample in the boiling state.

On the other hand, in the conventional portable salinity measuring device, it is difficult to keep the measurement depth constant since the two electrodes can be accurately measured by depositing the center electrode in the center of the depth of the sample.

Although it is similar to the conventional portable salinity measuring device, it has been proposed that a two-electrode sponge is combined with a two-electrode spoon to enclose two electrodes when the sample is contained. However, It was not resolved.

In addition, the conventional portable salinity measuring device has a problem in that it is very troublesome to measure the salt concentration because it is necessary to measure the salt concentration in parallel with the cooking utensil for cooking when it is used to measure the salinity in the food aqueous solution.

In addition, the conventional salinity meter can be measured in the state that the broth is directly contained in the spoon-like component, or another conventional salt meter is measured in the state that the measuring portion is immersed in the broth directly. There is a problem that an error phenomenon occurs in which the measurement value is low.

This makes it possible to absorb only the liquid of the sample by using the measuring tip, so that the ion meter which is improved by absorbing only the liquid of the sample from the measuring tip is not affected by the suspended matters, foreign matter, This is a required situation.

1. Registration No. 110-0912714 (salinity meter) 2. Registration No. 10-1047964 (Pocket salty taste sensor) 3. Registration No. 10-1030302 (Salinity meter 4. Registration No. 10-1105022 (Electronic salinometer) 5. Registration No. 10-0368871 (Cooking salinometer)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a selective ion meter using a test strip capable of absorbing only a liquid of a sample by using a single measurement tip.

Another object of the present invention is to absorb only the liquid of the sample from the measurement tip, thereby preventing the sample from being affected by the suspended substances, foreign matter, solids, temperature, and the like.

In addition, another object of the present invention is to provide a method and apparatus for measuring a measurement value, which is not affected by the characteristics of a sample, There is.

Another object of the present invention is to make accurate measurement without causing contamination or deformation of the body by the sample due to contact between the poles of the measurement tip and the poles of the body.

In order to achieve the above object, the present invention forms a body portion for displaying a numerical value of ion concentration in a sample obtained by performing a comparative calculation of + polarity and - polarity signals measuring a selective ion of a sample by a conductivity method, And is formed so as to expose a positive electrode and a negative electrode in a space of the insertion groove. The sample can be entirely absorbed by the insertion hole, A measuring tip having a first pole and a second pole which are in contact with a positive pole and a negative pole is formed at an end of the first and second poles, The sample is absorbed by the measuring tip in a state in which the sample is absorbed by the measuring tip or inserted into the insertion groove with the sample being absorbed by the measuring tip so that the measurement is carried out through the + electrode and the first electrode, Ha It provides an ion-selective meter using a test paper characterized in that.

As described above, according to the present invention, it is possible to measure only the liquid of a sample by using a single measuring tip, thereby obtaining accurate measurement values without being influenced by the suspended substances, foreign matter, solids, .

In addition, it is not influenced by the characteristics of the sample, and when the measurement using the measuring tip is completed, it is possible to accurately calculate the average measurement value by replacing the measuring tip with another measuring tip.

In addition, since the poles of the measuring tip and the poles of the body come into contact with each other, contamination or deformation of the body by the sample does not occur, so that it is easy to manage and accurate measurement is possible.

FIGS. 1A to 1E are views showing a conventional salinity meter,
FIG. 2 is a schematic view showing a selective ion meter using a test paper according to the present invention,
3 is a perspective view illustrating a selective ion meter using a test paper according to the present invention,
4 is a partial view showing the insertion groove in a front view, Fig. 5 (a) is a partial extracting view showing a side view of the insertion groove,
5 is a bottom view of the ion meter according to the present invention,
6 is a perspective view in which first and second poles and temperature-corresponding poles are formed on the measuring tip,
Fig. 7 is a partial exploded view showing the insertion groove in front; Fig. 7 is a partial extracting view in which the insertion groove is projected from the side;
8 is a perspective view in which a protective film is formed on the measurement tip, FIG. 2B is a perspective view in which first and second poles are formed on both sides of the measurement tip,
9 shows a process of stacking measurement tips and storing them in a storage box,
10 and 11 are perspective views of the measurement tips connected in the width direction and the longitudinal direction,
Figs. 12 to 14 show an example in which a sample is absorbed by a measurement tip and mounted on an ion measuring instrument.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

2 and 5, the selective ion meter using the test paper of the present invention includes a body 10 for calculating and analyzing measurement signals and displaying the measured values, (11), a first pole (21) (-) inserted into the insertion groove (13) and having a positive pole (11) and a negative pole The ion measuring instrument 100 is constituted by the measurement tip 20 formed with the electrode 22.

First, the selective ions represent hydrogen ion concentration (pH), redox potential difference (ORP), dissolved oxygen (DO), electrical conductivity, residual chlorine, and various ion measurement .

The body part 10 compares the signals of the positive and negative electrodes 11 and 12 obtained by measuring the selective ions of the sample by the conductivity method, Display.

In more detail, the internal circuitry of the body 10 is formed with an operation unit 10a for measuring conductivity by comparing two signals of positive and negative polarity, which use selective ions of the sample in the conductivity measurement method.

A program for calculating the concentration of ions in the sample by converting the conductivity measurement value into a frequency and using the frequency is built in and is calculated through the control processor 10b which controls various power sources and operations.

In addition, the body 10 has a display window 16 for displaying measured values, a sodium amount (Na +), a total amount of active ions (TDS) and a salt amount of various selective ions A lamp 17 for informing of various abnormalities and completion of the measurement by light or sound, and a buzzer 17a are formed.

The display window 16 is divided into a display area indicating a measured value and a display area indicating a measurement date and a measurement time according to the measured value.

The total amount of active ions (TDS) is based on the value of electric conductivity (EC: Eelectrical Conductivity) of water. The electrical conductivity is the conductivity of a solution between electrodes having a cross-sectional area of 1 cm 2 and a distance of 1 cm, And is related to the total amount of catIon and anIon contained in the water, is proportional to the soluble substance in the range of pH 5-9, and is proportional to the increase in water temperature.

The value of solid solubility in water is (μS / cm) × 0.5 to 0.6 = TDS (mg / L). When the ppm value of the total solids content is multiplied by 2, μS / cm value of water is obtained. However, depending on the type of water, errors may occur due to differences in the components contained therein, temperature, and accuracy of the instrument. The electrical conductivity at which the solids content is measured is multiplied by μS / cm, which is approximately 0.5, do.

For this, KS 0100-12 provides details on the measurement of electrical conductivity (conductivity), in which a dilute solution of KCl is used as a standard solution. For example, KCl 0.1N (7.55 g / L = 7,550 mg / Cm 2 at 18 ° C and 7,130 μS / cm at 0 ° C, and 1,409 μS / cm at 25 ° C for a KCl 0.01N solution and 1,220 μS / cm at 18 ° C for an electrical conductivity of 12,060 μS / It can be seen that it is almost equal to 75.5 ppm at 147 x 0.5 = 73.5 when it is diluted to 147 μS / cm in the case of 0.001 N, that is 75.5 mg / L in μS / cm and 0 ° C.

However, in the electrical conductivity chart of the Industrial Manual, the electrical conductivity of KCl at 0.001 N at 18 ° C is 127.3 μS / cm, which is comparable to the above value, and slightly reduced to 112 μS / cm for CaCl 2, but 55.5 Which is also very close to the value 55.1 multiplied by 0.5. In the case of Na2CO3, it is 112 at 18 ° C, which is considerably closer to N mass 53.

Therefore, it is possible to calculate the accurate conductivity by knowing the exact temperature and ion type. TDS = total amount of dissolved solids such as organic matter, inorganic matter, Ion, silt, ie, Concentivity = Conductivity = Conductivity = In many cases, however, the inverse of the resistance, the higher the electrical conductivity, the more ions are in the solution and the ability to carry the current is increased . In other words, TDS, which can be converted into ions by dissolving in water, will affect the conductivity.

The TDS is calculated by multiplying the electrical conductivity (EC) value by a constant, depending on the degree of conductivity of the pure water and the TDS. In general, when the value of EC is high, the value of the conversion constant for determining TDS also becomes large.

The mutual operation relationship can be calculated by the operation unit 10a and the unit of the sodium amount Na + can be represented by ‰ in the display window 16 by operating the function button 16a. The total amount of active ions (TDS: Total Dissolved Solids ) Is expressed in ppm, and practical salinity is expressed in units of psu,%, and ppt.

A charging terminal 18 for charging the battery 18a installed inside the case 15 is formed on one side and a lighting lamp 19 is formed on the front surface of the case 15 and a lighting button 19a, So that the sample can be easily identified at a site where no illumination is provided at night.

In addition, when the measuring tip 20 is inserted into the insertion groove 13 and the first and second poles 21 and 22 are in contact with the positive pole 11 and the negative pole 12, respectively, It may be configured to operate due to energization, and may be configured to control operation using a separate operation switch.

The insertion hole 13 is formed at one side of the body 10 so that the positive electrode 11 and the negative electrode 12 are exposed to the space of the insertion groove 13.

That is, the positive electrode 11 and the negative electrode 12 are protruded toward the center of the inner space so as to be in contact with the pole of the measurement tip 20 inserted into the insertion groove 13.

The first electrode 21 and the second electrode 21 are connected to the positive electrode 11 and the negative electrode 12, respectively, at the end inserted into the insertion groove 13, And a second pole 22 are formed on the surface of the measurement tip 20.

6 and 7, the positive electrode 11, the negative electrode 12, and the temperature sensor electrode 14 may be exposed in the inserting groove 13 as another embodiment.

The measuring tip 20 applied to the insertion groove 13 in which the positive electrode 11, the negative electrode 12 and the temperature sensor electrode 14 are formed has elasticity and is made of paper or fiber material The first and second poles 21 and 22 and the temperature-responsive pole 24 are separated from one side or both sides of the absorbent layer 23,

8, the absorption layer 23 of the measurement tip 20 is divided into first and second poles 21 and 22, first and second poles 21 and 22, 24 and the remaining part except for the other end are covered with a protective film 25 so that the protective film 25 is not affected by external substances. The protective film 25 is not affected by moisture penetration or solution, It is preferable to form a film or a coating of a transparent material onto which the absorption layer 23 of the liquid crystal display panel 20 can be projected.

The measurement tip 20 may be configured to be cleaned with distilled water so that the electrolyte material does not remain after the measurement is completed, and then dried and reused. In the present invention, the measurement tip 20 is made of pure water It is not polluted by the float due to the characteristic of absorbing water, so that the measuring tip 20 used in the measurement using the clean water is cleaned and dried so that it can be reused.

The measuring tip 20 has an elastic force and is formed by separating first and second poles 21 and 22 on one side or both sides of an absorbent layer 23 made of one of a paper material and a fiber material absorbing a sample You may.

The reason why the first and second poles 21 and 22 and the temperature-responsive pole 24 are formed on both sides of the measurement tip 20 is that if the terminal formed on one side is defective, .

The absorption layer 23 of the measurement tip 20 is described in the present invention as a white color, for example.

The first and second poles 21 and 22 and the temperature-responsive pole 24 may be made of a non-ferrous metal and may be formed of gold, platinum, silver, or the like.

9 to 11, the measuring tip 20 may be stacked on a separate storage box 20a in the form of a wide stick plate, and the measuring tip 20 may be connected to the connecting end 23a The measuring tip 20 is connected to the measuring tip 20 in a continuously connected state using a connecting tip 23a. The measuring tip 20 is connected to the measuring tip 20 by a connecting end 23a. 20 may be separated and used. In this case, when the single measuring tip 20 is used, the connecting end 23a may be cut and used.

That is, the ion measuring instrument 100 is configured such that the measuring tip 20 is inserted into the insertion groove 13 so that the first and second poles 21 and 22 are brought into contact with the positive pole 11 and the negative pole 12, respectively The sample is absorbed by the measurement tip 20 in a state where the sample is absorbed by the measurement tip 20 or inserted into the insertion groove 13 so that the positive electrode 11 and the first electrode 21, (12) and the second pole (22).

The operation and effect of the present invention constructed as described above will be described below.

First, as shown in FIGS. 2 to 14, the ion meter 100 measures the salinity of a soup dish which is most easily accessible in daily life among various selective ions according to an embodiment of the present invention.

First, in order to measure the salinity of the broth, the first and second poles 21 and 22, the first and second poles 21 and 22, and the temperature- Pole 12 and the positive pole 11, the negative pole 12 and the temperature sensor pole 14 of the positive electrode 13 in the first embodiment.

At this time, by inserting the measuring tip 20, the display window 16 of the body part 10 operates and when the measurement ready indication is displayed, the front end of the measuring tip 20 is slightly contacted with the broth, It is.

The opposite end of the measuring tip 20 on which the first and second poles 21 and 22 are formed is slightly brought into contact with the broth so that the absorbent layer 23 The first and second poles 21 and 22 and the first and second poles 21 and 22 and the temperature corresponding pole 24 are inserted into the positive pole 11 and the negative pole 11 of the insertion groove 13, Pole 12, the positive electrode 11, the negative electrode 12, and the temperature sensor electrode 14, respectively.

When the user inserts the measuring tip 20 into the insertion groove 13 of the body portion 10 or touches the soup, moisture or salt present in the hand is absorbed by the absorbent layer 23 In the present invention, even if the measurement tip 20 is touched by the structure of the protective film 25, it is possible to prevent the impregnation of foreign matter, moisture, and the like into the absorbent layer 23, so that accurate and reliable measurement values can be calculated .

When the soup is absorbed into the measurement tip 20, the positive electrode 11, the negative electrode 12, and the first and second poles 21 and 22 and the temperature- And the electric conductivities of the two poles 21 and 22 measure the amount of salt contained in the broth by the measuring principle and the temperature sensor pole 14 is brought into contact with the temperature corresponding pole 24, There is a feature to calculate and measure compensation.

Next, the two signals of the positive and negative poles measured at the positive and negative poles 11 and 12 are compared with each other by the calculating unit 10a, and then the measured conductivity values are converted into frequencies to be transmitted to the control processor 10b Calculates the salinity concentration in the sample using the frequency, and displays the salinity in numerical form through the display window 16.

At this time, when the user notifies the user of the completion of the measurement by the light of the lamp 17 of the body 10 or the sound of the buzzer 17a, the user can easily see the numerical value of the display window 16, It is easy to grasp.

In order to improve the reliability of the measurement result of the measurement tip 20, a first measurement is performed using a pole formed on one side, and then a second measurement is made on a pole formed on the opposite surface. It is possible to judge the change of the measured value and to calculate the error and the average value of the measured value.

Thus, the conventional salinity meter can be measured in the state that the broth is directly immersed in the shape of the spoon, or another conventional salinity meter measures the point in the state of being immersed in the soup directly, (-) - polarity of the solution to be measured can not be measured or a measurement error occurs due to a short-circuit phenomenon between the electrodes. On the other hand, the present invention can absorb only the pure solution into the measurement tip (20) 22, the positive electrode 11, and the negative electrode 12, so that accurate measurement values can be obtained.

In addition, the conventional salinity meter can be measured in the state that the broth is directly contained in the spoon-like component, or another conventional salt meter is measured in the state that the measuring portion is immersed in the broth directly. The present invention has a problem that the measurement temperature is low and the measurement value is low. On the other hand, the present invention absorbs only the pure liquid phase by slightly touching the soup with the measuring tip 20, There is a functionally improved feature that the heat is not generated until it is transmitted to the first and second poles 21 and 22 and is not affected by the measured value for temperature.

In addition, the conventional salinity meter or salinity meter is directly immersed in the broth in the boiling point state to measure thermal deformation of the pole and thermal deformation of the apparatus, and the broth flows into the assembled gap, However, the present invention is not limited to the case where the measurement is performed using the measuring tip 20 in the non-contact manner with the main body 10 and the broth, which is a sample for measurement, There is also a constitutionally improved feature that has a convenient advantage in terms of management.

In addition, the conventional salinity meter can be measured in the state that the broth is directly immersed in the shape of the spoon, or another conventional salinity meter is measured in a state in which the measuring part is immersed directly in the broth so that many contaminants are deposited on the gap and the surface of the measuring part There is a problem of non-hygiene due to the proliferation of fungi during prolonged use. On the other hand, in the present invention, after the measurement using the measuring tip 20, the used measuring tip 20 is not reused or cleaned and dried And there is an improved health feature that can maintain the pollution phenomenon and cleanliness by reusing it.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various changes and modifications may be made by those skilled in the art.

10: Body part 10a:
10b: control processor 11: positive pole
12: - pole 13: insertion groove
14: Temperature sensor pole 15: Case
16: Display 16a: Function button
17: Lamp 17a: Buzzer
18: charging terminal 18a: battery
19: illumination light 19a: illumination button
20: Measuring tip 20a:
21: first pole 22: second pole
23: absorption layer 24: temperature-responsive pole
25: protective film 100: ion measuring instrument

Claims (8)

(11) and - pole (12) signals obtained by measuring selective ions of a sample by a conductivity method, and then forming a body portion (10) for numerically displaying the ion concentration in the sample whose measurement value is converted into frequency and,
And the positive electrode 11 and the negative electrode 12 are exposed in the space of the insertion groove 13,
The first electrode 21 and the second electrode 21 are connected to the positive electrode 11 and the negative electrode 12 at the end inserted into the insertion groove 13, A measurement tip 20 provided with a second pole 22 is formed,
The measuring tip 20 is inserted into the insertion groove 13 and the first and second poles 21 and 22 are brought into contact with the positive and negative poles 11 and 12, And the sample is absorbed by the measurement tip 20 and inserted into the insertion groove 13 so that the positive pole 11 and the first pole 21, the negative pole 12 and the second pole 22) is configured to conduct the measurement by the conductivity method. The selective ion meter according to claim 1, wherein a positive electrode (11), a negative electrode (12), and a temperature sensor electrode (14) are exposed in the insertion groove (13). The measuring tip (20) according to claim 1, wherein the measuring tip (20) has first and second poles (21, 22) on one side or both sides of an absorbent layer (23) Wherein the separator is configured to be spaced apart from the separator. The measuring tip (20) according to claim 1, wherein the measuring tip (20) has first and second poles (21, 22) on one side or both sides of an absorbent layer (23) , And the temperature-responsive electrode (24) are spaced apart from each other. The method according to claim 3 or 4, wherein the absorption layer (23) of the measurement tip (20) comprises first and second poles (21, 22), first and second poles (21, 22) 24) and the remaining part except for the other end are covered with a protective film (25) so as not to be influenced by external substances. The body 10 according to claim 1, wherein the body 10 is inserted into the insertion groove 13 so that the first and second poles 21 and 22 are inserted into the positive and negative poles 11 and 12, respectively, ) Is in contact with the surface of the sample. The apparatus according to claim 1, wherein the body part (10) comprises a display window (16) for displaying measured values on one side of the case (15), a sodium amount (Na +) of various selective ions, a total dissolved solids (TDS) A function button 16a for selecting the amount of salt, a lamp 17 for indicating various abnormalities or completion of the measurement by light or sound and a buzzer 17a are formed in the case 15, Characterized in that a charging terminal (18) for charging the charging port (18a) is formed on one side and an illumination lamp (19) is formed on the front surface of the case (15). The measuring tip (20) according to any one of claims 1, 3, and 4, wherein the measuring tip (20) is configured to be rinsed with distilled water, dried and reused so that the electrolyte material does not remain after the measurement is completed Selective ion meter using test paper.

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