Categorization fixing device for freezing and storing example by liquid nitrogen

Abstract

The invention discloses a classification fixing device for a sample frozen by liquid nitrogen. The classification fixing device comprises a fixing plate; the fixing plate is provided with an opening; the outer edge of the fixing plate is provided with a plurality of clamping grooves; and a marker for distinguishing, positioning and freezing the sample is arranged between the clamping grooves. The invention relates to the classification fixing device with a simple structure and convenient use, can rapidly and accurately distinguish and extract the needed sample in order to accurately suspend and position the needed sample and better freeze the sample.

Description

Technical field [0001] The invention relates to a sample sorting and fixing device, in particular to a liquid nitrogen freezing sample sorting and fixing device. Background technique [0002] At present, most scientific research and medical institutions use liquid nitrogen tanks to freeze and store samples. Commonly used devices for suspending samples are cloth bags and buckets that are matched with liquid nitrogen tanks. The usual method is to tighten the cloth bag mouth with a rope, the cloth bag is suspended in liquid nitrogen, and the other end of the rope is led out through the narrow gap between the liquid nitrogen tank plug and the edge of the tank mouth. Since the diameter of the liquid nitrogen tank mouth is usually narrow, for example, the diameter of the 35 liter liquid nitrogen tank mouth is only 10 cm, so the circumference of the tank mouth edge is about 31 cm. When there are multiple suspension ropes tied to the tank mouth edge at the same time , The suspension rope...

AI Technical Summary

Problems solved by technology

Since the mouth of the liquid nitrogen tank is usually narrow, for example, the diameter of the mouth of a 35-liter liquid nitrogen tank is only 10 cm, so the circumference of the edge of the tank mouth is about 31 cm. When multiple suspension ropes are placed on the edge of the tank mouth at the same time , there will be suspension ropes intertwined with each other, and it is impossible to distinguish the samples; in addition, some samples need to be stored in the steam above the liquid nitrogen liquid level, and some samples need to be stored in liquid nitrogen, so the suspension of the sample requires accurate positioning. The current fixation of the suspension rope is imprecise, so the sample cannot be suspended exactly in the intended position

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