A temperature-adjustable ion chromatograph

Abstract

The present invention discloses a temperature-adjustable ion chromatograph, which relates to the field of analytical detection equipment, including an ion chromatograph and a temperature regulating device, wherein the temperature regulating device includes a compressor, a condenser, a drying filter, a capillary tube and six first evaporators, wherein the liquid outlet of the compressor is connected to the liquid inlet of the condenser, the liquid outlet of the condenser is connected to the liquid inlet of the drying filter, the liquid outlet of the drying filter is connected to the liquid inlet of the capillary tube, the liquid outlet of the capillary tube is connected to the liquid inlet of the first evaporator, the liquid outlet of each first evaporator is connected to the liquid inlet of the compressor, and the six first evaporators are sequentially arranged at the bottom of the sample tray. By adding the temperature regulating device, the sample injection device of the ion chromatograph has a temperature regulating function, and the temperature of the temperature-sensitive sample is controlled, that is, the sample to be detected can be placed in a constant temperature condition before the injection detection, so that the sample remains stable to ensure the accuracy of the sample detection.

Description

Technical Field

[0001] The invention relates to the field of analysis and detection equipment, and in particular to an ion chromatograph with adjustable temperature. Background Art

[0002] Ion chromatographs are mainly used for the analysis of environmental samples, including anions and cations in samples such as surface water, drinking water, rainwater, domestic sewage and industrial wastewater, acid precipitation and atmospheric particulate matter, and the analysis of trace impurities in water and reagents related to the microelectronics industry. In addition, it is also widely used in tobacco, food, health, petrochemicals, water and geology. Ion chromatography (IC) has the advantages of good selectivity and high sensitivity. It has been widely used in the detection of ammonia release in mainstream cigarette smoke and is also the method adopted by the tobacco industry standard YC / T 377. However, the particularity of ammonia components determines the poor stability of the sample solution: if it is placed at high temperature, such as above 22°C, or at room temperature for more than 18h, the test value will be higher than the true value. This results in a limited number of samples that can be tested daily and affects the accuracy of sample detection. Therefore, it is necessary to improve the sample injection device of the ion chromatograph so that it has a temperature adjustment function and temperature control for temperature-sensitive samples, that is, the sample to be tested can be placed in a specific temperature condition before injection detection, so that the sample remains stable to ensure the accuracy of sample detection. Summary of the invention

[0003] To this end, the present invention provides an ion chromatograph with adjustable temperature to solve the problem of low detection accuracy of existing ion chromatographs due to the inability to adjust the temperature.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a temperature-adjustable ion chromatograph, the temperature-adjustable ion chromatograph comprises an ion chromatograph, the ion chromatograph has a sample tray for placing samples, the sample tray has a fixed box cover and a movable box cover rotatably connected to the fixed box cover; the temperature-adjustable ion chromatograph also comprises a temperature regulating device, the temperature regulating device comprises a compressor, a condenser, a drying filter, a capillary tube and a plurality of first evaporators, the liquid outlet of the compressor is connected to the liquid inlet of the condenser, the liquid outlet of the condenser is connected to the liquid inlet of the drying filter, the liquid outlet of the drying filter is connected to the liquid inlet of the capillary tube, the liquid outlet of the capillary tube is connected to the liquid inlet of the plurality of first evaporators, the liquid outlet of the first evaporator is connected to the liquid inlet of the compressor, and the plurality of first evaporators are sequentially arranged at the bottom of the sample tray.

[0005] Furthermore, the temperature regulating device also includes a shell, and the compressor, condenser, drying filter and capillary tube are integrated in the shell.

[0006] Furthermore, the shell is arranged on the upper part of the ion chromatograph, and the shell is detachably connected to the shell of the ion chromatograph.

[0007] Furthermore, a groove is provided at the bottom of the sample tray, and the first evaporator is embedded in the groove.

[0008] Furthermore, the temperature regulating device also includes a second evaporator, the liquid inlet of the second evaporator is connected to the liquid outlet of the capillary tube, the liquid outlet of the first evaporator is connected to the liquid inlet of the compressor, and the second evaporator is arranged on the lower surface of the fixed box cover.

[0009] Furthermore, the temperature regulating device further comprises a fan, wherein the fan is arranged on the lower surface of the fixed box cover, and the fan is located above the second evaporator.

[0010] Furthermore, the temperature regulating device also includes a display screen, a main control circuit board, multiple temperature sensors and multiple flow control valves. The main control circuit board is electrically connected to the compressor, the display screen, the temperature sensor and the flow control valve respectively. The multiple flow control valves are arranged one by one at the liquid inlets of the multiple first evaporators, and the multiple temperature sensors are embedded in the bottom of the sample tray in sequence.

[0011] Furthermore, the model of the ion chromatograph is ICS-5000.

[0012] The present invention has the following advantages: the temperature-adjustable ion chromatograph of the present invention enables the sample injection device of the ion chromatograph to have a temperature adjustment function by adding a temperature adjustment device, and the temperature of the temperature-sensitive sample can be controlled, that is, the sample to be tested can be kept at a constant temperature condition before the sample injection test, so that the sample remains stable, thereby ensuring the accuracy of the sample detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0014] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0015] Figure 1 A schematic diagram of the structure of the temperature-adjustable ion chromatograph provided by the present invention;

[0016] Figure 2 A schematic diagram of the top structure of the fixed box cover provided by the present invention;

[0017] Figure 3 A schematic diagram of the structure of the temperature regulating device provided by the present invention;

[0018] Figure 4 The ion chromatograph provided by the present invention is equipped with a temperature regulating device to detect NH4 in the mainstream smoke of cigarettes + Results of the content change over time;

[0019] Figure 5 This is a connection diagram of the circuit part of the temperature regulating device provided by the present invention.

[0020] Explanation of the reference numerals: 10. Ion chromatograph; 11. Sample tray; 12. Fixed box cover; 20. Temperature regulating device; 21. Compressor; 22. Condenser; 23. Dry filter; 24. Capillary; 25. First evaporator; 26. Second evaporator; 27. Housing; 28. Fan; 29. ​​Display screen; 30. Main control circuit board; 31. Temperature sensor; 32. Flow control valve. DETAILED DESCRIPTION

[0021] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1 As shown, the temperature-adjustable ion chromatograph includes an ion chromatograph 10 and a temperature regulating device 20. The ion chromatograph 10 has a sample tray 11 for placing samples. The sample tray 11 has a fixed box cover 12 and a movable box cover rotatably connected to the fixed box cover 12. The fixed box cover 12, the movable box cover and the sample tray 11 together constitute a closed space. Placing the sample in the sample tray 11 can reduce the influence of the external temperature during the sample detection process. In this embodiment, the ion chromatograph 10 adopts the Thermos (Thermo Fisher) ion chromatograph 10, and the model of the ion chromatograph 10 is ICS-5000. Of course, the model of the ion chromatograph 10 is not limited thereto, and other models of ion chromatographs can also be used.

[0023] like Figure 2 and3 As shown, the temperature regulating device 20 includes a compressor 21, a condenser 22, a drying filter 23, a capillary tube 24, six first evaporators 25, a shell 27, a display screen 29, a main control circuit board 30, six temperature sensors 31 and six flow control valves 32. The liquid outlet of the compressor 21 is connected to the liquid inlet of the condenser 22, the liquid outlet of the condenser 22 is connected to the liquid inlet of the drying filter 23, the liquid outlet of the drying filter 23 is connected to the liquid inlet of the capillary tube 24, the liquid outlet of the capillary tube 24 is connected to the liquid inlet of each first evaporator 25, and the liquid outlet of each first evaporator 25 is connected to the liquid inlet of the compressor 21. The six first evaporators 25 are sequentially arranged at the bottom of the sample tray 11, so as to divide the sample tray 11 into six areas with different temperatures. Of course, the number of the first evaporators 25 is not limited thereto, and can be increased or decreased according to actual needs. In order to ensure the flatness of the bottom of the sample tray 11, a groove is arranged at the bottom of the sample tray 11, and the first evaporators 25 are embedded in the groove. The main control circuit board 30, the compressor 21, the condenser 22, the drying filter 23 and the capillary tube 24 are integrated in the housing 27, and the display screen 29 is embedded in the surface of the housing 27. Figure 5 As shown, the main control circuit board 30 is electrically connected to the compressor, the display screen 29, the temperature sensor 31, and the flow control valve 32 respectively. The six flow control valves 32 are arranged at the liquid inlets of the six first evaporators 25 in a one-to-one correspondence. The flow control valves 32 are used to change the flow entering the condenser in the first evaporator 25, thereby changing the temperature of each area. The six temperature sensors 31 are sequentially embedded in the bottom of the sample tray, each temperature sensor 31 corresponds to a first evaporator 25, and the temperature sensor 31 is used to measure the temperature in each area. The main control circuit board 30 is used to process the temperature information measured by each temperature sensor 31 and control the display screen 29 to display it. The main control circuit board 30 is provided with control keys, and the user can set the temperature of each area through the control keys. The shell 27 is arranged on the upper part of the ion chromatograph 10, and the shell 27 is detachably connected to the shell 27 of the ion chromatograph 10. If the temperature regulating device 20 is not used for a long time, the evaporator, the compressor 21, and the capillary 24 can be disconnected, the shell 27 is separated from the shell 27 of the ion chromatograph 10, and the temperature regulating device 20 is placed separately.

[0024] Furthermore, in a preferred embodiment of the present invention, the temperature regulating device 20 also includes a second evaporator 26 and a fan 28. The liquid inlet of the second evaporator 26 is connected to the liquid outlet of the capillary 24, and the liquid outlet of the first evaporator 25 is connected to the liquid inlet of the compressor 21. The second evaporator 26 is arranged on the lower surface of the fixed box cover 12, and the fan 28 is also arranged on the lower surface of the fixed box cover 12. The fan 28 is located above the second evaporator 26. The fan 28 is arranged above the second evaporator 26. When the fan 28 rotates, the cold air generated by the second evaporator 26 will be carried by the airflow to each tail of the sample tray 11, so that the temperature in the sample tray 11 quickly reaches the predetermined temperature.

[0025] Working principle: After placing the sample in the sample tray 11, turn the movable box cover to seal the sample tray 11, and the compressor 21 starts to work, transporting the high-pressure steam to the condenser 22. The high-pressure steam releases heat in the condenser 22 and is converted into high-pressure liquid. When the high-pressure liquid and the remaining high-pressure steam pass through the capillary 24, the remaining high-pressure steam is completely converted into high-pressure liquid. When the high-pressure liquid enters the first evaporator 25 and the second evaporator 26, it is converted into low-pressure steam, which absorbs the heat in the sample tray 11 and reduces the temperature in the sample tray 11 to the preset temperature. Since the working temperature of each first evaporator 25 is different, the sample tray 11 is divided into six different temperature zones. Figure 4 As shown, if the temperature is lower than room temperature (such as 4°C), the sample is kept stable to ensure the accuracy of sample detection. Of course, the function of the temperature adjustment device 20 is not limited to lowering the temperature. For some experiments that require increasing the temperature, the condenser 22 can be set in the sample tray 11 and the evaporator can be set in the shell 27.

[0026] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A temperature-adjustable ion chromatograph, comprising an ion chromatograph, wherein the ion chromatograph has a sample tray for placing samples, wherein the sample tray has a fixed box cover and a movable box cover rotatably connected to the fixed box cover; characterized in that: The temperature-adjustable ion chromatograph further comprises a temperature regulating device, which comprises a compressor, a condenser, a drying filter, a capillary tube and a plurality of first evaporators, wherein the liquid outlet of the compressor is communicated with the liquid inlet of the condenser, the liquid outlet of the condenser is communicated with the liquid inlet of the drying filter, the liquid outlet of the drying filter is communicated with the liquid inlet of the capillary tube, the liquid outlet of the capillary tube is communicated with the liquid inlet of the plurality of first evaporators, the liquid outlet of the first evaporator is communicated with the liquid inlet of the compressor, and the plurality of first evaporators are sequentially arranged at the bottom of the sample tray; The bottom of the sample tray is provided with a groove, and the first evaporator is embedded in the groove; The temperature regulating device further comprises a second evaporator, the liquid inlet of the second evaporator is communicated with the liquid outlet of the capillary tube, the liquid outlet of the first evaporator is communicated with the liquid inlet of the compressor, and the second evaporator is arranged on the lower surface of the fixed box cover; The temperature regulating device further comprises a fan, which is arranged on the lower surface of the fixed box cover and is located above the second evaporator; The temperature regulating device also includes a display screen, a main control circuit board, multiple temperature sensors and multiple flow control valves. The main control circuit board is electrically connected to the compressor, the display screen, the temperature sensor and the flow control valve respectively. The multiple flow control valves are arranged one by one at the liquid inlets of the multiple first evaporators, and the multiple temperature sensors are embedded in the bottom of the sample tray in sequence.

2. The temperature-adjustable ion chromatograph according to claim 1, characterized in that: The temperature regulating device further comprises a shell, and the compressor, the condenser, the drying filter and the capillary tube are integrated in the shell.

3. The temperature-adjustable ion chromatograph according to claim 2, characterized in that: The shell is arranged on the upper part of the ion chromatograph, and the shell is detachably connected to the shell of the ion chromatograph.

4. The temperature-adjustable ion chromatograph according to claim 1, characterized in that: The model of the ion chromatograph is ICS-5000.

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