Colorimetric tube for portable colorimetric device and method for stirring reagent

Abstract

A colorimetric tube for a portable colorimetric device, which includes an outer tube (1) for storing a sample to be tested and a first liquid (1.1) and an inner tube (2) for storing other reaction liquids, the outer tube (1) The upper end is provided with an opening for inserting the inner tube (2), and the lower end of the inner tube (2) is provided with an extension tube (6) that can extend below the mixed liquid surface of the first liquid (1.1) and the sample, and the extension tube ( 6) It communicates with the inner cavity of the inner tube (2), and the inner wall of the extension tube (6) is slidingly connected with at least one sealing plug for preventing or releasing other liquids from leaking down; the inner wall of the inner tube (2) is slidingly fitted with a piston (4.1) and Its piston rod (4.2), the upper end of the wall of the inner tube (2) is provided with a vent hole (5) communicating with the inner cavity of the outer tube (1) and the atmosphere.

Description

Technical field [0001] The invention relates to the field of sample detection, in particular to a colorimetric tube used in a portable colorimetric device and a method for stirring reagents. Background technique [0002] At present, colorimetric tubes are used in the chemical analysis and testing of samples, and the reacted colorimetric tubes are subjected to photometric detection through the instrument to determine the chemical composition of the samples. Colorimetric tubes are widely used in environmental testing (such as river water quality testing) and food quality testing. , In the field of medical testing or other industries, the portable colorimetric tube is small in size and can be used to carry out and test on-site samples. It is real-time and convenient. [0003] For example, in many medical tests, it is necessary to mix the sample to be measured with the first liquid in order to remove the interfering components in the sample and initiate the first chemical reaction or b...

AI Technical Summary

Problems solved by technology

[0006] 1) The amount and ratio of the first liquid and the second liquid used to react with the sample need to be strictly controlled, and the above method of mixing the first liquid and the second liquid by pushing the sealing plug makes it easy for the second liquid to remain in the The inner wall of the second mixing container or the sealing plug, resulting in an inaccurate amount of the second liquid participating in the reaction, thereby affecting the reaction between the first liquid and the second liquid, and ultimately resulting in inaccurate photometric detection;

[0007] 2) The above-mentioned mixing container is only suitable for the mixing of two liquids, and cannot be tested with more than three reagents

[0008] 3) The magnetic beads need to be placed in advance in the above-mentioned first mixing container, and the biochemical analyzer needs to be equipped with a magnetic stirring plate that cooperates with the magnetic beads, so that the magnetic beads vibrate and stir in the mixed liquid, so that the reaction is sufficient and the mixing is uniform. However, the structure of the biochemical analyzer in this way is more complicated and the cost is higher; in addition, since the magnetic beads are pre-packaged in the liquid in the first mixing container, the surface of the magnetic beads needs to be cleaned before being soaked in the liquid. Special treatment, and long-term immersion of magnetic beads in the liquid may change the composition of the liquid, which may affect the results of subsequent reactions

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