CN-121978196-A - Self-cleaning detection equipment for detecting lactic acid in white spirit Daqu

Abstract

The invention relates to the technical field of lactic acid detection, in particular to self-cleaning detection equipment for detecting lactic acid in white spirit Daqu, which comprises a sampling bottle, a sampling tube, an ion mobility spectrometer, a valve body, a flow guide tube, a dropper, a storage cavity and a pump body, wherein the valve body is arranged between the ion mobility spectrometer and the sampling tube, the flow guide tube is obliquely arranged on the side wall of the sampling bottle, one end of the flow guide tube, which is close to the sampling tube, is lower than one end, which is far away from the sampling tube, the dropper is vertically arranged on one side of the flow guide tube and is communicated with the upper end of the flow guide tube, the storage cavity is communicated with the flow guide tube, the bottom height of the storage cavity is the same as the height of the upper end of the flow guide tube, and the pump body is arranged on the upper part of the storage cavity and is used for pumping air in the storage cavity or injecting air into the storage cavity. The invention reduces the manual operation intensity and improves the overall working efficiency and the data reliability of lactic acid detection in Daqu.

Inventors

• LUO LING
• HAN YANG
• FENG FANG
• WANG DONGPENG
• LIU ZHIQUAN
• WANG KEJIN

Assignees

• 四川化工职业技术学院

Dates

Publication Date

20260505

Application Date

20260408

Claims (10)

1. 1. A self-cleaning detection device for detecting lactic acid in white spirit Daqu comprises a sampling bottle (1), a sampling tube (21) and an ion mobility spectrometer (2); Characterized by further comprising: A valve body (22) disposed between the ion mobility spectrometer (2) and the sampling tube (21); The flow guide pipe (3) is obliquely arranged on the side wall of the sampling bottle (1), and one end of the flow guide pipe (3) close to the sampling tube (21) is lower than one end far away from the sampling tube (21); The dropper (4) is vertically arranged on one side of the guide pipe (3) and is communicated with the upper end of the guide pipe (3), a storage cavity (41) for communicating the dropper (4) with the guide pipe (3) is arranged between the dropper and the guide pipe, and the bottom of the storage cavity (41) is the same as the upper end of the guide pipe (3); And the pump body is arranged at the upper part of the storage cavity (41) and is used for pumping out air in the storage cavity (41) or injecting air into the storage cavity (41).
2. 2. Self-cleaning detection device for detecting lactic acid in white spirit Daqu according to claim 1, characterized in that the flow guide tube (3) extends into the sampling bottle (1) towards one end of the sampling bottle (1).
3. 3. Self-cleaning detection device for detecting lactic acid in white spirit Daqu according to claim 1, characterized in that the lower end of the sampling tube (21) is a flaring structure arranged vertically downwards.
4. 4. A self-cleaning detection apparatus for detecting lactic acid in white spirit Daqu as defined in claim 1, further comprising: The lifting frame (5) is arranged below the dropper (4); a storage bottle (51) arranged at the upper part of the lifting frame (5) and used for storing isopropanol samples dissolved with lactic acid; and the first linear driver (6) is arranged on one side of the lifting frame (5) and is used for driving the lifting frame (5) to move along the vertical direction.
5. 5. The self-cleaning detection device for detecting lactic acid in white spirit Daqu according to claim 4, wherein a cleaning bin (52) is further arranged on the upper portion of the lifting frame (5), a sewage outlet (521) for sewage is formed in the bottom of the cleaning bin (52), and a switch valve (522) is arranged on the sewage outlet (521).
6. 6. The self-cleaning detection device for detecting lactic acid in white spirit Daqu according to claim 5, wherein a discharge port (523) for discharging isopropanol vapor is formed in the side wall of the cleaning bin (52).
7. 7. The self-cleaning detection device for detecting lactic acid in white spirit Daqu according to claim 6, wherein the upper parts of the storage bottle (51) and the cleaning bin (52) are respectively provided with an opening, rubber films (53) are respectively arranged at the opening of the storage bottle (51) and the opening of the cleaning bin (52), a through hole for a dropper (4) to pass through is formed in the center of the rubber film (53), and the diameter of the through hole is smaller than that of the dropper (4).
8. 8. Self-cleaning detection device for detecting lactic acid in white spirit daqu according to claim 7, characterized in that a reinforcement ring (531) is arranged at the lower part of the rubber membrane (53) along the axial direction of the through hole.
9. 9. Self-cleaning detection device for detecting lactic acid in white spirit Daqu according to claim 4, characterized in that a limiting ring (54) for limiting the storage bottle (51) is arranged on the lifting frame (5).
10. 10. Self-cleaning detection device for detecting lactic acid in white spirit Daqu according to claim 4, characterized in that the storage bottles (51) are provided with a plurality of horizontally arranged second linear drivers (7) for driving the two to synchronously move along the horizontal direction are arranged at the lower parts of the lifting frame (5) and the first linear drivers (6).

Description

Self-cleaning detection equipment for detecting lactic acid in white spirit Daqu Technical Field The invention relates to the technical field of lactic acid detection, in particular to self-cleaning detection equipment for detecting lactic acid in white spirit Daqu. Background In the prior art, when the lactic acid content in Daqu is detected, the main detection methods include liquid chromatography, benzyl esterification, ion chromatography, near infrared spectroscopy and the like. And an ion mobility spectrometer is used as an analysis means of lactic acid in Daqu and fermented grains, the sample pretreatment process is simple and time-saving, no filtering operation is performed, and the detector is not polluted and the separation column is not blocked. The method comprises the steps of (1) analyzing a lactic acid standard substance, adopting an anion mode ion mobility spectrometer to detect, obtaining a peak-out mobility time spectrogram of lactic acid, (2) sample pretreatment, dissolving a sample by using isopropanol which is selective to ionization of air reagent ions of the anion mode ion mobility spectrometer as an extraction solvent, and (3) sample analysis, wherein the sample obtained in the step (2) is detected in the anion mode of the ion mobility spectrometer, and the peak mobility time of the sample obtained in the step (2) is compared with the peak mobility time of a lactic acid signal of the spectrogram in the step (1), so that quantitative analysis target peak tracking signal intensity data is selected for quantitative analysis. However, when lactic acid is detected by an ion mobility spectrometer, isopropyl alcohol in which lactic acid is dissolved needs to be dripped into a sampling bottle, and a sampling tube on the instrument needs to be inserted into the sampling bottle from the upper part of the sampling bottle, so that in order to improve the accuracy of detection, the lactic acid needs to be diluted into samples with different concentrations by using the isopropyl alcohol for testing. Each time a test is performed on samples of different concentrations, the sampling bottle is removed and samples of different concentrations are dripped again, and then the sampling bottle is connected with an instrument. The operation steps are complicated, and the loading and unloading process of the sampling bottle needs to be repeated. Disclosure of Invention Aiming at the problems, the self-cleaning detection equipment for detecting the lactic acid in the white spirit Daqu is provided, and the operation flow of lactic acid detection is effectively simplified by utilizing the cooperative cooperation of the valve body, the flow guide pipe, the dropper, the storage cavity and the pump body, so that the quantitative automatic conveying and accurate throwing of a lactic acid sample are realized. The sampling bottle is not required to be manually and repeatedly disassembled and assembled or samples are manually dripped, so that the manual operation strength is reduced, and the risks of cross contamination and concentration deviation caused by manual contact are avoided. In order to solve the problems in the prior art, the invention provides self-cleaning detection equipment for detecting lactic acid in white spirit Daqu, which comprises a sampling bottle, a sampling tube and an ion mobility spectrometer; The detection apparatus further includes: The valve body is arranged between the ion mobility spectrometer and the sampling tube; The flow guide pipe is obliquely arranged on the side wall of the sampling bottle, and one end of the flow guide pipe, which is close to the sampling pipe, is lower than one end of the flow guide pipe, which is far away from the sampling pipe; The dropper is vertically arranged on one side of the flow guide pipe and is communicated with the upper end of the flow guide pipe, a storage cavity for communicating the dropper with the flow guide pipe is arranged between the dropper and the flow guide pipe, and the bottom height of the storage cavity is the same as the height of the upper end of the flow guide pipe; And the pump body is arranged at the upper part of the storage cavity and is used for pumping out the air in the storage cavity or injecting the air into the storage cavity. Preferably, the flow guide pipe extends into the sampling bottle towards one end of the sampling bottle. Preferably, the lower end of the sampling tube is provided with a flaring structure which is vertically downwards arranged. Preferably, the detection apparatus further includes: The lifting frame is arranged below the dropper; the storage bottle is arranged at the upper part of the lifting frame and is used for storing an isopropanol sample dissolved with lactic acid; the first linear driver is arranged on one side of the lifting frame and used for driving the lifting frame to move along the vertical direction. Preferably, a cleaning bin is further arranged on the upper portion of the lifting frame