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Emitter structure of burette joint

A burette and dripper technology, which is applied in the direction of chemical analysis by titration, measuring tube/pipette, etc., and can solve the problems affecting the volume of liquid droplets, etc.

Inactive Publication Date: 2012-12-26
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the droplet drips out, the pressure difference in the burette slowly decreases, so that it affects the volume of the droplet

Method used

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  • Emitter structure of burette joint
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  • Emitter structure of burette joint

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0011] A dropper structure of a burette joint, a pipette tip that is socketed at the tip of the burette, the tip of the pipette has a through hole in the middle and a frustum-like structure at the top, the tip of the pipette is The two sides of the frustum are provided with a cut surface from the outer surface of the frustum to the top frustum surface. The intersection line between the cut surface and the outer surface of the frustum is a inferior arc, that is, the cut surface is a inferior arc surface, and the inferior arc corresponding to the inferior arc on the inferior arc surface The string is below the through hole; the tip of the tip of the pipette is a wedge-shaped structure with double-sided inferior arcs;

[0012] The inferior arc surfaces on both sides are arranged symmetrically, and the angle between the tip parts of the two inferior arc surfaces is 60°.

[0013] Control group: take an ordinary 10ml burette, when titrating from the 0 scale line, drop 10 drops of li...

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Abstract

The invention relates to an emitter structure of a burette joint. A pipette tip is sleeved on a sharp nozzle of a burette, and is of a structure that the middle of the pipette tip is provided with a through hole and the top end is provided with a frustum, two sides of the top end of the pipette tip are provided with a section from a frustum outer surface to a top end frustum surface, the intersecting line of the section and the frustum outer surface is an inferior arc, i.e. the section is an inferior arc surface, and an inferior arc chord corresponding to the inferior arc on the inferior arc surface is positioned below the through hole. The invention can effectively improve the titration precision and reduce experimental errors, and is especially suitable for micro-titration and semimicrotitrimetry operations.

Description

technical field [0001] The invention relates to a dropper for a burette joint, in particular to a pipette gun replacement head with double inferior arcs socketed at the tip of the burette. Background technique [0002] The design principle of the burette is to discharge the droplets through the pressure difference of the liquid, and to control the flow rate of the droplets by adjusting the direction of the knob to meet the purpose of titration. However, as the droplet drips out, the pressure difference in the burette slowly decreases, so that the volume of the droplet is affected. It is found through experiments that for a 10ml buret, when titrating from the 0 scale line, the volume of a drop is 0.045ml. When the liquid level is at the 9ml scale line, the volume of a drop is 0.05ml, and the error of only one drop is 10%. Contents of the invention [0003] In order to reduce the volume change of the droplet caused by the pressure difference of the liquid, the author refer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01L3/02G01N31/18
Inventor 周桦马强王瑞杰宇万太
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI