Pressing-out type quantitative easy-to-mark handheld surface sampling petri dish

Abstract

The invention discloses a pressing-out type quantitative easy-to-mark handheld surface sampling petri dish, which comprises a petri dish bottom and a petri dish cover. The petri dish bottom is provided with second clamping fasteners and first clamping fasteners, and the second clamping fasteners and the first clamping fasteners form stably embedded structures. The embedded structures can be loosened under stress, so that movable petri dish bottom side walls and first petri dish bottom side walls move relatively. By cooperation of first handgrips and second handgrips, the petri dish bottom andthe petri dish cover can be conveniently opened or closed together; mark areas enable high efficiency in marking operation; agar culture medium pouring volumes can be indicated through scale lines.

Description

technical field [0001] The invention relates to an experimental equipment, in particular to an extruded quantitative and easy-to-mark hand-held surface sampling petri dish. Background technique [0002] Petri dishes are one of the most widely used experimental equipment in biology. They are often used for the cultivation and testing of microorganisms on the surface of food packaging materials, tableware and other objects, and the sampling of microorganisms on the surface of objects is usually wiped with sterile cotton swabs. Use sterile filter paper to stick to the surface of the object to be tested, and then transfer the cotton swab or filter paper to the buffer for elution to achieve the purpose of sampling. However, cotton swabs or filter paper cannot completely release the collected microorganisms, which may easily lead to incomplete cultivation of culturable microorganisms; in addition, the sampling of microorganisms on the surface of objects requires aseptic operation,...

AI Technical Summary

Problems solved by technology

However, cotton swabs or filter paper cannot completely release the collected microorganisms, which may easily cause incomplete cultivation of cultivable microorganisms; in addition, the sampling of microorganisms on the surface of objects requires aseptic operation, while cotton swabs or filter paper are used in the collection and elution of microorganisms. During the process, it is easy to be polluted by environmental microorganisms, and it is difficult to meet the requirements of aseptic operation; these shortcomings will cause the deviation of the microbial test results on the surface of the object

In addition, the operation process of the above method is cumbersome and inefficient, which easily causes waste of human resources

Most of the existing petri dishes are made of glass and need to be marked with an oil-based marker pen. However, the handwriting of the oil-based marker pen needs to be erased with a special organic solvent. Therefore, when multiple petri dishes are used repeatedly, the inconvenience of marking will easily cause to confuse

When the culture dish is poured into the agar medium, the pouring volume of the medium is usually determined by the operator according to experience, so the pouring volume of the agar medium of different personnel may have a large difference, thereby affecting the relevant experimental results

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