CN2560924Y - Volumetric flask - Google Patents

Abstract

The utility model relates to a measuring flask. A bottle cap sleeved on a bottleneck and sealed a bottleneck grind is added based on the prior measuring flask. A saturated gas space is added for the measuring flask of the utility model, so as to reduce the volatilization rate of the liquid in the bottle, for keep the concentration and volume of standard solution stable for a long time. The utility model is suitable for storing volatile standard solution prepared by organic solvent and standard substances afraid of volatilization, as well as the chemical examination and analysis in chemical engineering and medical treatment fields.

Description

Volumetric flask

Affiliated technical field

The utility model relates to the chemical analysis experiment instrument, particularly relates to a kind of volumetric flask.

Background technology

Volumetric flask is the analyzing container commonly used that is used to prepare accurate volume and accurate concentration standard solution in the chemical experiment.Though volumetric flask adopts the grinding port plug sealing, the adaptation of bottle stopper and bottleneck is better, and solution seepage phenomenon can not take place, and is difficult to accomplish that solution can not volatilize in the long preservation process.Particularly for the lower organic solvent of some boiling points, its volatility is bigger, and variation has just taken place concentration in very short time placing thereby cause the standard solution for preparing, can not continue to use again, and causes the waste of reagent and solvent.

Summary of the invention

The purpose of this utility model provides a kind of reduction solution evaporation speed, volumetric flask that can long preservation solution.

The purpose of this utility model is to realize by the volumetric flask with following structure:

Volumetric flask includes a bottle stopper and a bottle that has bottleneck, bottle stopper and ground sealing between the bottleneck of bottleneck upper end.Volumetric flask also includes the bottle cap of frosted mouth in the band, is used to be enclosed within bottleneck, and and the frosted mouth of bottleneck outside between the ground sealing.

On the bottleneck of volumetric flask, have a flare.

The bottle cap of volumetric flask and the outside of bottle are respectively arranged with two hooks, can bottle cap and bottle be fixed together by hook.

Volumetric flask of the present utility model, on the basis of original use ground bottle stopper sealing, increased the ground bottle cap sealing at skin again, make volumetric flask have solution top and inner two seal cavities of bottle cap in the bottle, therefore, when the solution evaporation in the volumetric flask, can form the saturated gas space of two solution.Because the existence in outer saturated gas space, making the saturated gas of depositing standard solution in the volumetric flask evaporate into outer field speed reduces greatly, stoped the further volatilization of bottle internal standard solution, thereby greatly reduced the evaporation rate of solution, the concentration and the volume of the solution that can maintain the standard long-term and stably do not change.

The bottleneck of general volumetric flask is thinner, and bottleneck is less, the volumetric flask of small size specification particularly, and bottleneck is littler.This just shifts solution to volumetric flask and has brought difficulty, during transfer, solution is dropped on the bottleneck limit, causes experimental error.The utility model has increased a flare at the bottle mouth position of volumetric flask, has made things convenient for the solution jump operation of volumetric flask, and the inclined-plane of enlarging simultaneously can not lose when solution is shifted, and has reduced experimental error.

Volumetric flask of the present utility model is suitable for the standard solution by organic solvent preparation, easy volatilization, also is suitable for depositing the standard substance that some are afraid of volatilization, is applicable to the assay in the fields such as chemical industry, medical treatment.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

As shown in Figure 1, the bottle 6 of volumetric flask is a flat vial of pyriform that has thin bottleneck 5.Bottleneck 4 is positioned at the upper end of bottleneck 5, has the frosted mouth, and has a flaring enlarging 3.Bottle stopper 2 plugs of a band ground are on bottleneck 4, and the ground of bottle stopper 2 matches with the ground of bottleneck 4.

In the outside of volumetric flask, also have a bottle cap 1, cover on bottleneck 5, bottle cap 1 also adopts the ground sealing with the junction of bottleneck 5.

Be provided with hook 7 in the outside of bottle cap 1, the also corresponding hook 7 that is provided with in the outside of bottle 6 can be enclosed within bungee on two groups of hooks, and bottle cap and bottle are fixed together.

Claims (3)

1, a kind of volumetric flask, include bottle stopper (2) and a bottle (6) that has bottleneck (5), bottle stopper (2) and be positioned at ground sealing between the bottleneck (4) of bottleneck (5) upper end, it is characterized in that: the bottle cap (1) that also includes frosted mouth in the band, be enclosed within on the bottleneck (5), and and the frosted mouth of bottleneck (5) outside between the ground sealing.

2, volumetric flask according to claim 1 is characterized in that bottleneck (4) has a flare (3).

3, volumetric flask according to claim 1 is characterized in that being respectively equipped with two hooks (7) in the outside of bottle cap (1) and bottle (6).