Colorimetric ware and preparation method thereof

Abstract

The present invention relates to the improvement of the analytical cuvette and its manufacturing method, which is characterized in that the glass flakes are bonded to each other as a fusion bonding without an additional adhesive, and the preparation is to finish the bonding surface of the glass flakes until the bonding surface is in the There is no external force to maintain natural suction, and then melt and bond at a temperature lower than the softening temperature of the glass used in the cuvette. The cuvette of the present invention overcomes all the shortcomings of the prior art using adhesive bonding, has high precision, high optical path parallelism and optical path precision, can reach ±0.01mm, will not cause cross contamination, good quality, and high yield High, long service life.

Description

technical field [0001] The invention relates to the improvement of the cuvette for analysis and its manufacturing method, in particular to a high-precision cuvette and a method for bonding the cuvette glass sheets to each other. Background technique [0002] Quantitative analysis cuvettes for holding test liquids, such as the standard cuvettes described in Chinese patent CN2297000, are made of several optical glass sheets bonded to each other to form a glass vessel with a liquid storage test chamber. The existing cuvette glass sheet Mutual bonding is through bonding agent (glue bonding and glass frit fusion bonding). Glue bonding is to apply glue on the mutual bonding surfaces for bonding, such as described in Chinese patent CN00807831.9. This kind of bonding, due to the poor temperature resistance of the glue, the cuvette is not resistant to high temperature, usually the highest can only withstand about 100 ℃, beyond this temperature the adhesive will lose its effect and c...

AI Technical Summary

Problems solved by technology

The disadvantage of this type of bonding is: glass powder is fused and bonded, and the transparency of the bonded surface is poor, which not only affects the appearance quality, but also brings quality defects. For example, due to the different expansion coefficients of glass powder and glass, glass powder is easily fused Cracks are generated, causing the leakage of the test solution, especially in the acid-base or organic solution medium bonding surface, the leakage is more serious; the tiny particles of glass powder will be adsorbed to the light-transmitting surface of the cuvette during the fusion bonding process to form unwanted spots , affect the light transmittance of the test; the melting of glass powder can also easily cause the joints to be rough and not smooth, and it is easy to cause adhesion of the test object, and it is difficult to be effectively cleaned and removed, so it is easy to cause cross-contamination of the test object; these will affect the test accuracy. to bad effects

This method can only be used for the bonding of ordinary glass products and products that can be processed on the bonding surface after bonding, but not for the bonding between glass slides of cuvettes. Not only the partial defects of glass frit fusion bonding (such as sticking The poor transparency of the junction surface, rough seams, etc.) still exist, and the manual bonding and crimping, the tolerance and the parallelism of light transmission have greater deviations, and the optical path accuracy cannot meet the requirements of use at all, so it is not used by cuvettes. used by the manufacturing industry