Method for quickly measuring silicon dioxide and modulus in potash water glass

Abstract

The invention relates to the field of detecting potash water glass, in particular to a method for quickly measuring the potash water glass for fluorescent powder. The method comprises the following steps of: 1) accurately weighing the potash water glass, and shaking up the potash water glass uniformly to obtain solution of the potash water glass; 2) adding a methyl red indicator into the solution; 3) titrating K2O by using solution of hydrochloric acid until the K2O turns red from yellow, and measuring the content of the K2O, wherein the solution is also used for measuring SiO2; 4) adding sodium fluoride into the solution, namely adding the sodium fluoride into the solution after measuring the content of the K2O, and dissolving the sodium fluoride to ensure that the solution turns yellow; 5) titrating silicon dioxide, namely adding standard solution of the hydrochloric acid when the solution turns red; 6) titrating the excessive hydrochloric acid by using the standard solution of sodium hydroxide until the solution turns yellow; and 7) performing a blank experiment, namely adding the standard solution of the hydrochloric acid, and performing the titration slowly by using the standard solution of the sodium hydroxide until the solution turns yellow. The method can quickly and accurately measure the silicon dioxide and the modulus in the potash water glass for the fluorescent powder.

Description

technical field [0001] The invention relates to the technical detection field of potassium water glass components, in particular to a rapid determination method of potassium water glass for fluorescent powder. Background technique [0002] Potassium silicate is an important raw material for phosphor surface treatment, and its main components are potassium oxide, silicon dioxide, and water. Silica and modulus in potassium silicate are two important technical indicators to measure the performance of potassium silicate, and the accuracy of the analysis results plays a vital role in product quality and cost control. At present, the gravimetric method is used to test the silica and modulus in potassium silicate. The test of this method needs to be burned at a high temperature of 700°C in a muffle furnace. The process is complicated, lengthy, laborious, and consumes a lot of energy. It is scrapped, and the sample is prone to collapse and splashing during high-temperature burning,...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem in the prior art that the detection of potash water glass is burned at a high temperature of 700°C, the process is complex, consumes a lot of energy, and the crucible will be scrapped after one use, the present invention provides a combination of silica and modulus in potash water glass A rapid assay method comprising the steps of:

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