Method of preparing spectrally-pure superfine silver chloride

Abstract

The invention relates to a method of preparing spectrally-pure superfine silver chloride, belonging to the technical field of inorganic chemistry. In order to solve a technical problem, the invention provides a method of preparing spectrally-pure superfine silver chloride. The method of preparing spectrally-pure superfine silver chloride comprises the following steps: a, getting analytically-pure silver nitrate liquor and then dropwise adding mixed liquor of hydrochloric acid, alcohol and ethyl ether into the liquor until no white precipitates are generated; b, standing, so that the precipitates are completely settled and filtered to obtain silver chloride precipitates; c, washing by adopting 40wt%-50wt% alcohol liquor; precipitating the silver chloride precipitates prepared in the step b for 2-4 times, and then, washing the silver chloride precipitates by several times by using distilled water of 50 DEG C-60 DEG C until pH value of the filtrate is 4.5-6.0 and no chlorine ions are detected in the filtrate by using silver nitrate; and d, drying the washed silver chloride precipitates to obtain spectrally-pure superfine silver chloride.

Description

technical field [0001] The invention relates to a method for preparing spectrally pure ultrafine silver chloride, which belongs to the technical field of inorganic chemistry. Background technique [0002] In spectroscopic analysis, silver chloride is usually used as a buffer to improve the analytical sensitivity of rare earth elements, rare elements, etc. The silver chloride used in laboratory analysis and testing is generally commercially available analytically pure silver chloride, and spectrally pure silver chloride with higher purity is generally difficult to buy, even if it is commercially available, its silver chloride crystal form is also Irregular angular particles (minimum particle size up to 10 meshes) cannot be ground into powder, and cannot be completely mixed with the sample to be tested, so they cannot play the role of buffer. For the analysis and testing of trace metal elements in high-purity rare earths, rare metals and their compounds, because high-purity s...

AI Technical Summary

Problems solved by technology

The silver chloride used in laboratory analysis and testing is generally commercially available analytically pure silver chloride, and spectrally pure silver chloride with higher purity is generally difficult to buy, even if it is commercially available, its silver chloride crystal form is also Irregular angular particles (minimum particle size up to 10 meshes), cannot be ground into powder, cannot be completely mixed with the sample to be tested, and thus cannot play the role of a buffer

For the analysis and testing of trace metal elements in high-purity rare earths, rare metals and their compounds, because high-purity silver chloride that meets the requirements cannot be obtained, the accuracy of the analytical data will be affected, and even serious distortion of the data will be caused. degree difference

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