Automatic quantitative sampling device

Abstract

The invention belongs to the technical field of sample sampling and discloses an automatic quantitative sampling device which is applied to the technical field of radioactive sample sampling. The device mainly comprises a conductive liquid level control system and a sampling system, wherein the sampling system comprises a vacuum pump, a buffer bottle and a graduated vessel; the vacuum pump is connected with the buffer bottle and the graduated vessel in sequence so as to pump the sampling system into negative pressure. The graduated vessel is internally provided with two electrodes. A target solution is pumped into the graduated vessel under the action of negative pressure. When the liquid level in the graduated vessel reaches the high electrode, the two electrodes are powered on, and a signal controller can control corresponding solenoid valves to be turned on or turned off after receiving signals. The automatic quantitative sampling device has the advantages of being simple in structure, high in quantitative accuracy and capable of continuously and automatically transferring and sampling a sample solution.

Description

technical field [0001] The invention belongs to the technical field of sample sampling, and in particular relates to an automatic quantitative sampling device. Background technique [0002] Automatic quantitative sampling device is an indispensable part of continuous automatic analysis technology, especially for samples that are not convenient for analysts to operate at close range, such as samples in strong ionizing radiation environments and radioactive solution samples. At present, there is no mature automatic sampling technology for the sampling of these samples. Generally, remote operation tools such as manipulators are used to take out an appropriate amount of radioactive solution from the storage bottle with a pipette, transfer it to another receiving bottle, and then transfer it out again. Quantitative sampling using pipettes or pipettes is cumbersome to operate and is prone to radioactive contamination, which increases the risk of polluting the environment and high ...

AI Technical Summary

Problems solved by technology

At present, there is no mature automatic sampling technology for the sampling of these samples. Generally, remote operation tools such as manipulators are used to take out an appropriate amount of radioactive solution from the storage bottle with a pipette, transfer it to another receiving bottle, and then transfer it out again. Quantitative sampling using pipettes or pipettes is cumbersome and prone to radioactive contamination, which increases the risk of polluting the environment and high radiation doses to operators

[0003] Patent No. ZL92231059.9, invention titled "Shielded Remote Radioactive Liquid Pipetting Device" discloses a pipetting device that uses a manually operated injection syringe to draw negative pressure and is connected to a shielded chamber through a hose. The tube sucks the sample from the sample bottle and transfers it manually. This method can reduce the radiation dose received by the operator, but it cannot be automated and is prone to mechanical wear

Patent No. ZL200520032960.2 also discloses a device that uses a peristaltic pump to quantitatively extract radioactive solutions. In the pressurized vials, although automatic quantitative sampling is realized, the entire sampling pipeline is too long, which may easily cause cross-contamination between samples

The patent document with the application number CN102175489 also discloses a device for quantitative sampling using an electric pipette. The functional parts of the entire sampling device are modularized. The liquid device automatically extracts the solution to realize automatic quantitative sampling. This method can automatically and continuously sample and reduce the labor intensity of the operator. However, due to the complexity of the whole set of devices and the high cost of the electric pipette, its wide promotion is limited.

Images