SU60041A1 - Pipette - Google Patents

Description

A pipette is often used to measure chemical reagents. A reagent is immersed in a reagent and provided with a thin section to hold it in the neck of the vessel.

The proposed pipette, in contrast to such well-known pipettes, is equipped with an intermediate coupling between it and the vessel with the reagent. The coupling is connected to the outer surface of the pipette, thus preventing the accumulation of reagent on this surface.

The drawing shows a pipette with a sleeve, inserted into a vessel with a reagent.

In its upper part, the pipette 3 has a tap 4, with which a certain amount of reagent can be released from it with an accuracy of 0.05 ml. Slow outflow of the reactive agent - one drop at a time. This is accomplished by means of a notch on the surface of the faucet (at the hole); This ensures a weak air flow at the beginning of the opening of the tap, which pushes a very small amount of reagent out of the pipette. On the wall of the pipette there are divisions.

through 0.1 ml. A pipette volume of 5-10 ml is for chemical analysis in field conditions.

Tank I with a plug-in coupling 2 connected to it with a thin section serves to store the reagent. In the quantity required for analysis purposes {250-500 MUI is sufficient for field laboratories). The pipette is filled with reagent by compressing the air in the tank above the liquid, which is obtained by quickly opening the upper opening of the tank. When raising and lowering the coupling with (inserted into it the pipette 3, in which the valve 4 must be installed in the open position.

The clutch 2 carrying the pipette 3 is connected to it by means of a slip and serves to protect the outer surface of the pipette from contact with the reagent in the tank, which would prevent accurate measurement of the reagent due to accumulation of liquid, adhering due to the glass wiping, to the outer surface of the pipette . When placing the coupling 2 with the 3 V pipette inserted into it, the reservoir 1 has a liquid level. The m ufta 2 is set a few millimeters above the bottom edge of the coupling, so the pittotka 3 is dipped into the reagent only by euoZD with a thin Cone on which le can accumulate volume of fluid.

The subject matter of the invention.

A pipette for measuring the reagents from the vessel provided to the grinding sections for fixing the pipettsi in its neck, characterized in that, in order to prevent the accumulation of the reagent on the outer surface of the pipette body, the latter is provided with a sleeve 2 connected to it.