Liquid-liquid microextraction oscillation device

Abstract

The invention relates to a liquid-liquid microextraction oscillation device which comprises a motor as well as a controller (1), a connector (2), a tray (3) and more than two extraction tube brackets (6). More than two groups of grooves (16) are arranged on a tray vertical plate (12) of the tray (3), and one group of grooves (16) is used for buckling one extraction tube bracket (6) onto the tray vertical plate (12); each of the extraction tube brackets (6) is connected together through transverse fixing rods (7); one extraction tube bracket (6) comprises a base plate (13), a fixed plate (14), rubber mats (8) and a cover board (9), wherein the size of the base plate (13) is matched with the grooves (16), the fixed plate is fixed on the base plate (13), and both the base plate (13) and the fixed plate (14) are provided with corresponding coaxial and concentric round holes. The liquid-liquid microextraction oscillation device has the advantages that the manufacture and the operation are simple, the cost is low, a large number of samples can be processed at the same time, and the efficiency is high.

Description

technical field [0001] The invention relates to a liquid-liquid micro-extraction oscillation device. Background technique [0002] In recent years, the pollution of organic compounds to water bodies has become increasingly serious, and the research on its pollution level and health effects has attracted more and more attention. In 1977, the U.S. National Environmental Protection Agency (USEPA) screened 129 priority pollutants in 65 categories from 70,000 organic compounds based on factors such as the toxicity of organic pollutants, the possibility of biodegradation, and the probability of appearing in water bodies. Among them, there are 114 kinds of organic compounds, accounting for 88.4% of the total, including 21 kinds of pesticides, 26 kinds of halogenated aliphatic hydrocarbons, 8 kinds of polychlorinated biphenyls, 11 kinds of phenols, 7 kinds of nitrous acids and other compounds. These compounds themselves have a certain degree of bioaccumulation, some are inherently ...

AI Technical Summary

Problems solved by technology

[0004] (1) From the perspective of the fixing method of the extraction container: there are currently two ways to hold the test bottle and test tube used for the oscillator. One is to use a metal triangular clip or a metal triangular clip with a metal spring. This kind of holding method , due to the different sizes of various test bottles and test tubes, and the metal triangular clamp has a certain rigidity, so the clamper is prone to over-tightening or loosening between the clamped objects, and the clamping effect is poor. The operation is also inconvenient; the other is the rubber clamping belt with round holes, which is expensive and difficult to process

[0005] (2) From the perspective of the structure of the oscillator: the current medical oscillator usually adopts the structure of an oscillating plate, and the corresponding test tube is realized by placing it in a fixed groove on the oscillating plate. Since the depth and size of the fixed groove are fixed values , so that the size of the test tube applicable to an oscillator is limited

The test bottle and test tube of the flipping oscillation method are easy to be thrown out and broken under the condition of high-speed rotation, which not only wastes raw materials and bottles, but also pollutes the entire oscillator, and has the problems of high price and high maintenance cost; The direction is horizontal and vertical to the center axis of the test bottle and test tube.

In the horizontal oscillation, the oscillation route is parallel to the test tube axis. The structure of the instrument is complex, the cost is high, and the number of samples processed at the same time is small; the oscillation route in the horizontal oscillation is perpendicular to the test tube axis. The method mainly adopts the vortex oscillation method, the oscillation amplitude is small, and the mixing / extraction efficiency is low

Images