Solid-phase microextraction sampling rod

Abstract

The invention discloses a solid-phase microextraction sampling rod which structurally comprises a button, a threaded shaft, a rod body, a containing pipe, a suction pipe and a sampling storage head, the button is matched with the suction pipe through the threaded shaft in an electrical connection mode, the threaded shaft is connected to the sampling storage head, the containing pipe is arranged in the sampling storage head, a regulation and control part and a centering file are arranged on a power assisting body, and the power assisting body is connected with the rod body. The regulating part and the centering file are matched on the arc plate, when the port of the suction tube generates upward traction force on the rubber tube body of the containing tube, the port of the suction tube can be extruded to the regulating part through the sleeve hole, so that the regulating part pushes the arc plate to be opened and closed on the centering file by means of the extension plate on the premise that the regulating part is kept balanced, and the suction tube can be conveniently taken out. And the centering file is guided to turn inwards and outwards from the handrail and is supported at the sleeve hole and the port of the suction tube, so that an enough moving gap is ensured between the suction tube and the sleeve hole.

Description

technical field [0001] The invention relates to the field of sampling rods, in particular to a solid phase microextraction sampling rod. Background technique [0002] Endocrine disruptors include a wide range of compounds with different properties. The main analytical methods include biological testing methods and instrumental analysis methods. Compared with other techniques, solid-phase microextraction has the advantages of less sample amount and selectivity of analytes. It has high characteristics, so it is suitable for analyzing endocrine disruptors with very low content and complex structure. The existing solid-phase microextraction sampling rods generally use a retractable colloidal carrier tube to carry the collected liquid, so that the size of the nozzle is consistent. The suction pipe sucks the quantitative detection liquid. When the suction pipe port rotates upwards and sucks the liquid in the liquid container tube, it will not only have negative pressure attraction...

AI Technical Summary

Problems solved by technology

[0002] Endocrine disruptors include a wide range of compounds with different properties. The main analysis methods include biological testing methods and instrumental analysis methods. Compared with other techniques, solid phase microextraction has the advantages of less sample consumption and high selectivity for the analytes. High characteristics, so it is suitable for the analysis of endocrine disruptors with very low content and complex structure. The existing solid-phase microextraction sampling sticks generally use a retractable colloidal holding tube to carry the collected liquid, so that the size of the nozzle is consistent When the suction pipe absorbs a certain amount of detection liquid, when the suction pipe port rotates upward while absorbing the liquid in the liquid holding tube, it will not only have a negative pressure attraction for the liquid in the holding tube, but also produce a negative pressure on the rubber tube of the holding tube. The upward pulling force makes the holding tube twist in the same direction and elongates to fit on the straw, causing the holding tube to be blocked at the end of the straw, forming resistance to the suction of liquid by the straw, and reducing the suction speed of the straw

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