Tweezers

Abstract

The invention discloses a pair of tweezers. The pair of tweezers comprises a tweezers tail, two tweezers arms and two tweezers heads, wherein the upper ends of the two tweezers arms are connected with the tweezers tail; the lower ends of the two tweezers arms are connected with the two tweezers heads respectively; opposite surfaces of the two tweezers heads are concave arc surfaces; after the two tweezers heads are closed, a clamped object is limited and fixed between the two concave arc surfaces; in the tweezers, at least the concave arc surfaces which are in contact with the clamped object are made of stainless steel. According to the tweezers disclosed by the invention, when a sample feeding bottle is clamped in experiment sample chromatographic analysis, the pair of tweezers has the advantages of firmness in clamping and uneasiness of sliding off; a phenomenon that the contact parts of the tweezers and the sample feeding bottle contains a plasticizer so that a sample to be detected in the sample feeding bottle is polluted is avoided.

Description

technical field [0001] The invention relates to the field of experimental instruments, in particular to tweezers. Background technique [0002] When professional chromatographic analysis laboratories conduct chromatographic or spectral detection of pesticide residues, fatty acids, heavy metals and other samples, experimenters often need to use organic reagents to fix the volume in the sample bottle during sample pretreatment, and in batch testing, many Perform the operations of arranging the sample bottle, screwing the cap, or clamping the sample bottle once. If you grab it directly with your hands, the human body temperature will easily cause the volatilization and loss of the standard substance. Harmful reagents will pollute the contact parts of human hands and endanger human health. Even if disposable gloves are worn during operation, there is still a risk of toxic organic reagents penetrating into the skin tissue of personnel's hands through the gloves. At present, twee...

AI Technical Summary

Problems solved by technology

[0002] When professional chromatographic analysis laboratories conduct chromatographic or spectral detection of pesticide residues, fatty acids, heavy metals and other samples, experimenters often need to use organic reagents to fix the volume in the sample bottle during sample pretreatment, and in batch testing, many Perform the operation of arranging the sample bottle, screwing the cap, or clamping the sample bottle for the first time. If you grab it directly by hand, human body temperature will easily cause the volatilization and loss of the standard substance. Harmful reagents will pollute the contact parts of human hands and endanger human health. Even if disposable gloves are worn during operation, there is still a risk of toxic organic reagents penetrating into the skin tissue of the hands of personnel through the gloves

At present, tweezers are used in the laboratory to flexibly pick up some objects, but most of the existing tweezers are of flat, curved or pointed structure, and these tweezers are easy to slip when clamping the sample bottle, resulting in sample loss, which is difficult to meet the experimental analysis Require

In addition, some of the existing laboratory tweezers are made of plastic. In the detection of special indicators such as plasticizers, if these tweezers are used to clamp and seal the sample bottle, the plasticizer in the tweezers will contaminate the sample to be tested. sample

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