Method for accurately measuring trace quantity liquid refractivity

Abstract

A method of precise measurement microscale refractive rate is the method of measurement the refractive of transparent and semi-transparent liquid or solid. The purpose of invention is measuring the refractive rate of transparent and semi-transparent liquid and solid medium. It accords the imaging principle of coaxial spherical optical system and measures the focal spot position of capillary with inhaling the measured liquid and gets the measured liquid's refractive rate by calculation. Select the properly capillary references according to the refractive measurement range of measured medium and then get the need of measurement precision. Example: measuring the multiple liquid medium with refractive n which is higher than 1.33 and lower than 1.48, and the standard deviation of measurement result is between 0.0002 and 0.001; the demand of sample is only 0.004ml. The sample is seal in the capillary and it is benefit to measure the microscale, toxic, irritating, effumable and inhaling liquid's refractive and also it can be used to measure the density of liquid. The invention's equipment is simple and measurement is convenience and reliable and it can be used in the research and producing department of chemical industry, medical, food, and fossil oil industry.

Description

Technical field [0001] The invention belongs to a method for measuring the refractive index of transparent, translucent liquid or solid by using visible light as a light source. Background technique [0002] In chemical industry, medicine, food, petroleum and other industrial departments and college experiments, it is often necessary to measure the refractive index of some liquids and solids. The current commonly used methods for measuring the refractive index of objects are as follows: [0003] Geometric Optics Methods. According to the law of refraction index and the law of total reflection, the refraction index is calculated by accurately measuring the relevant angle and distance. Such as minimum deflection angle method, total reflection method, grazing incidence method, displacement method, etc. Among them, the Abbe refractometer is widely used and relatively mature in technology. The Abbe refractometer can quickly and accurately measure the refractive index of subst...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the large amount of samples to be tested in the current liquid refractive index measurement method, which is not conducive to the measurement of the refractive index of toxic, pungent, volatile, and water-absorbing liquids, especially simple measuring instruments and high measurement accuracy The problems that cannot be taken into account, the present invention aims to provide a method for accurately measuring the refractive index of a small amount of transparent, translucent liquid or cylindrical fiber-optic solid using only a glass capillary and a conventional reading microscope

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