Rubber-head burette

Abstract

The invention discloses a rubber-head burette which comprises a rubber head and a glass suction pipe, wherein the lower end of the glass suction pipe is reversely conical; and the upper end of the glass suction pipe has a calabash-shaped structure. The rubber-head burette is characterized in that scales are formed on a glass pipe body. The burette is simple in structure and easy to manufacture, can effectively avoid corrosion of reagents to the rubber head and has rough quantifying property.

Description

technical field [0001] The invention relates to a sampler, in particular to a rubber dropper for laboratory use. Background technique [0002] The dropper is mainly used to transfer a small amount of chemical reagents. It is one of the commonly used instruments in experiments. It usually consists of a rubber tip and a pointed glass tube. When using the dropper, pinch the rubber head tightly with your fingers to drive out the air in the dropper, then put the dropper into the reagent bottle, let go of your finger, the reagent will be sucked in, just squeeze the rubber head again, because The liquid that needs to be transferred in the experiment is usually a chemical reagent, even a highly corrosive chemical reagent. If you accidentally inhale too much dose when transferring the chemical reagent, it is easy to cause the reagent to enter the rubber head, or leave a residue when it is placed flat. Chemical reagents are also easy to flow back into the rubber head, causing the rub...

AI Technical Summary

Problems solved by technology

When using the dropper, pinch the rubber head tightly with your fingers to drive out the air in the dropper, then put the dropper into the reagent bottle, let go of your finger, the reagent will be sucked in, just squeeze the rubber head again, because The liquid that needs to be transferred in the experiment is usually a chemical reagent, even a highly corrosive chemical reagent. If you accidentally inhale too much dose when transferring the chemical reagent, it is easy to cause the reagent to enter the rubber head, or leave a residue when it is placed flat. Chemical reagents are also easy to flow back into the rubber head, causing the rubber head to corrode, harden, become sticky and black, and even rot and leak, which will affect the use. At this time, the rubber head needs to be replaced frequently, which causes waste of resources and is easy to damage the environment. produce pollution

Moreover, the droppers currently used in the market only have the function of dripping and transferring reagents. If the reagents are roughly quantitatively added, it cannot be realized. At this time, the instrument needs to be replaced, which causes inconvenience to the experimental operation.

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