Anti-blocking high-flux full-automatic solid-phase extraction device for food detection

Abstract

The invention discloses an anti-blocking high-flux full-automatic solid-phase extraction device for food detection, relates to the technical field of food detection equipment, and aims to solve the problem that existing high-flux full-automatic solid-phase extraction equipment is easy to block in a nitrogen-blown three-way electromagnetic valve area. According to the technical scheme, the device is characterized by comprising a device host, a sample pipe, a solvent pipe, an injection pump, an input pipe and an output pipe; and the injection pump is connected with the input pipe and is used for pumping a sample and a solvent to be conveyed from the input pipe, the output pipe is used for being communicated with the upper end of a solid-phase extraction column, and the input pipe and the output pipe are directly communicated through the connecting pipe. A high-flux full-automatic solid-phase extraction instrument can greatly reduce the blockage condition, and the stability of the solid-phase extraction process is improved.

Description

technical field [0001] The invention relates to the technical field of food testing equipment, more specifically, it relates to an anti-clogging high-flux full-automatic solid-phase extraction device for food testing. Background technique [0002] In the process of food testing, sample pretreatment is usually the first step of analysis. The result of this step will affect the subsequent analysis process. Through the cooperation of various processing instruments, various parts of the food are separated and processed, so that the obtained substances Adapt to subsequent detection processing. [0003] Solid-phase extraction equipment is a sample pretreatment technology developed in recent years. It is developed from the combination of liquid-solid extraction column and liquid chromatography technology. It is mainly used for the separation, purification and concentration of samples. Compared with the traditional liquid-liquid extraction method It can improve the recovery rate of...

AI Technical Summary

Problems solved by technology

Usually, high-throughput automatic solid-phase extraction equipment is used for processing, and the required samples can be obtained during the processing process. However, the current high-throughput automatic solid-phase extraction equipment does not have a special model for the food testing industry. Often used in the process, commonly used instruments in the fields of medicine, environment, chemical industry, etc. Therefore, it is not suitable for food testing in the testing process, which is not conducive to testing and processing, resulting in blockage, and hidden detection inaccuracy may occur in the setting

[0004] The high-throughput automatic solid-phase extraction instrument mainly includes the main engine, sample tube, solvent tube, syringe pump, solid-liquid extraction tube and collection tube for sampling. The output end of the syringe pump is connected to the input tube, and the output end is connected to the The solid-liquid extraction tube, the role of the syringe pump, transports the sample to the solid-liquid extraction tube through the input tube and the output tube, and washes and extracts through different solvents; the input tube and the output tube are connected by a three-way solenoid valve, and the The third end of the three-way solenoid valve is connected to the nitrogen device through the nitrogen blowing pipe, and through the switching of the three-way solenoid valve, nitrogen blowing and drying can be carried out to the solid phase extraction column at the lower end of the output pipe through the nitrogen device; The phase extraction process requires nitrogen blowing with nitrogen, so a nitrogen device is set up here. In the testing standards in the field of food testing, nitrogen blowing treatment is not required, and the electromagnetic valve and nitrogen device here will not be used, forming Unnecessary cost waste; and because the solenoid valve is not suitable for a long time, the input pipe and the output pipe on both sides of the solenoid valve, the internal pipeline channel is more tortuous and narrow, especially in its electromagnetic switching part, which is more complicated and narrow, long Time continues to stop, and it is easy to block inside the electromagnetic valve; and food detection is more complicated than the detection of water in the environment and chemical industry, and there are more ingredients in the adaptation, and there are great differences among different foods. There is a certain influence of blockage in the transportation process of the input pipe and the output pipe, and it is more likely to cause blockage in the part of the solenoid valve with narrow and tortuous passages, which affects the normal use of the detection equipment.

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