Sample treatment method and automatic treatment device

Abstract

The invention discloses a sample treatment method and an automatic treatment device. The treatment method comprises the following steps of: modifying a ZSM-5 molecular sieve, adding a treatment agentand the ZSM-5 molecular sieve into a sample, performing ultrasonic extraction, carrying out centrifuging and separating supernatant. The automatic sample treatment device comprises a box body, a firstmechanical arm, a second mechanical arm, an adsorbent storage tank and a solvent storage tank. During working, the first mechanical arm adds a treatment agent and a molecular sieve into a centrifugetube, a rotor carrying the centrifuge tube descends to perform ultrasonic extraction and centrifugation on a solution in the tube, and then the second mechanical arm sucks supernatant for detection. According to the sample treatment method and the automatic treatment device, the treatment efficiency can be improved, the automation of the whole sample treatment process is completed, and the operation accuracy and safety are improved.

Description

technical field [0001] The invention relates to a sample processing method and a processing device, in particular to a processing method and an automatic processing device for pesticide residue samples. Background technique [0002] Modern agricultural production is increasingly dependent on exogenous substances such as pesticides, antibiotics and hormones, and the unreasonable use of these substances usually leads to excessive pesticide residues in agricultural products and affects food safety. Therefore, when agricultural products are harvested and before they are sold, relevant agencies and departments will conduct pesticide residue testing on them. [0003] Chromatography is one of the commonly used methods for detecting pesticide residues. It mainly separates and detects substances according to the different distribution coefficients of different substances in the stationary phase and mobile phase. Due to the limitation of instrument precision, the sample must be proce...

AI Technical Summary

Problems solved by technology

Due to the limitation of instrument precision, the sample must be processed when performing the above-mentioned chromatographic detection

Commonly used sample processing techniques include solid phase extraction, microwave extraction, gel chromatography and other methods. These methods have low degree of automation, low extraction and purification efficiency, slow speed, and serious environmental pollution.

Matrix-dispersed solid-phase extraction technology condenses the traditional sample pretreatment technology, which is suitable for the extraction and purification of various molecular structures and polar pesticide residues, and the difference in purification effect is small under different matrix conditions, but the extracted samples need to be carefully analyzed during the operation. Grinding with extracted materials, the degree of automation is poor, and it is difficult to process in batches

Moreover, in the conventional sample pretreatment operation, repeated addition of solution for extraction will lead to the escape of organic solvents, which is harmful to the health of workers and will also affect the test results

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