An automatic liquid volume quantification and concentration method with adjustable precision

Abstract

The invention relates to an automatic liquid volume quantification and concentration method with adjustable precision, which belongs to the testing field. It uses the following components to realize the functions of multi-selection rapid concentration and high-precision automatic volume quantification; the components described at least include: basic components set on the basic components, temperature control components, air blowing components, negative pressure extraction condensing components, Rotary shaking evaporation components and automatic liquid level detection components. It can provide heating, rotary evaporation, negative pressure extraction, air blowing and other concentration methods for users to choose at the same time. The user has a wide range of options and flexibility, and also speeds up the experiment process, saving time and cost; and, through two sets of low-precision The positions of the sensors are matched to achieve the purpose of improving the detection accuracy and reducing the manufacturing cost. It can be widely used in the field of high-precision liquid level detection in the quantitative concentration process in the chemical sample pretreatment.

Description

technical field [0001] The invention belongs to the field of chemical analysis or testing, in particular to a liquid volume quantification and concentration method for chemical pretreatment. Background technique [0002] Analytical chemistry is a science that studies the analytical methods and theories of chemical information such as the composition, content, structure and form of substances. When analyzing a sample, it is generally necessary to try to separate the different chemical components. [0003] Chemical pretreatment is the pretreatment process for separating different components of the analysis sample, or removing interfering components, or changing its state for convenient measurement, etc., mainly including sample extraction, purification, enrichment, derivatization, etc.; [0004] Quantitative concentration is a sample pretreatment technology developed in recent years. [0005] In terms of concentration, the volatilization of the solvent in the sample solution...

AI Technical Summary

Problems solved by technology

[0006] In terms of quantitative volume, there are mainly two methods in the prior art. One is the manual method, that is, through human observation, the concave liquid surface is tangent to the corresponding scale. Capacity to a certain volume), the work intensity is high, and it is used less and less now; the other is the use of automatic identification technology, that is, a pair of liquid level detection sensors composed of a transmitter and a receiver are driven by a mechanical arm to detect Liquid volume, which uses the refraction principle of light to judge the position of the liquid surface. When the light emitted by the light source at the transmitting end does not exceed the critical position of the horizontal tangent of the concave liquid surface, the light passes through vertically and directly shines on the receiving end (the received light intensity is the largest ); when the light emitted by the light source at the transmitting end exceeds the critical position of the horizontal tangent of the concave liquid surface, the light will be refracted, but the receiving end will not receive the light, or the received light intensity will drop significantly, so it can be judged that this position is the concave surface. liquid level

[0007] This method can determine the position of the meniscus, but since the diameter of the light beam emitted by this liquid level detection sensor is relatively large (for example, the diameter of the light output is generally 3mm, mainly to reduce the difficulty of installation for users), even if a small hole is used Leakage masks (such as small holes with a diameter of 0.5mm) to reduce the beam diameter are also difficult to meet the needs of small volume and high precision quantitative volume determination

[0008] Moreover, most of the relevant equipment currently on the market is only satisfied with the single function of concentration or volume quantification, and there are few products integrating both functions.

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