Measurement method for zirconium oxide in drainage sand

Abstract

The invention provides a measurement method for zirconium oxide in drainage sand. The measurement method is characterized by comprising the following steps of preparing a reagent, preparing a test sample in a molten state, performing titration, and calculating zirconium oxide content. The measurement method for the zirconium oxide in the drainage sand has the beneficial effects that flux by whichthe zirconium oxide sample can be completely dissolved is used, accuracy detection data of the measurement method shows that the experiment recycling rate is 99-102%, and precision detection data shows that the RSD of the method is 0.68% and is remarkably higher than that of normal standard of which the RSD is 3%. By the method, the problem that the sample is difficult to dissolve during the measurement process of the zirconium oxide in the drainage sand is solved, so that the accuracy and the precision of a zirconium oxide element in the drainage sand measured by an EDTA complexometric titration method are remarkably improved, and the measurement method can be applicable to production and verification.

Description

technical field [0001] The invention belongs to the technical field of chemical substance analysis methods, in particular to a method for determining zirconium dioxide in drainage sand. Background technique [0002] At present, the main analysis method for zirconium dioxide in drainage sand is the gravimetric method of phenylglycolic acid, but this method not only has a long analysis period, cumbersome operation, and is not easy to control, but also produces white flocculent precipitates of zirconium phenylglycolic acid after adding phenylglycolic acid. When the interfering element hafnium will also generate white flocculent precipitates of hafnium phenylglycolate, which may easily lead to high results; in addition, phenylglycolic acid is an organic reagent with high toxicity, which is a dangerous drug and pollutes the environment. These problems limit the large-scale use of this method. Scale used. [0003] Another commonly used method is the EDTA complexometric titration ...

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Problems solved by technology

[0005] In order to make up for the deficiencies of the prior art, the present invention provides a method for determining zirconium dioxide in drainage sand, which solves the problem that the sample is not easy to dissolve during the determination of zirconium dioxide in drainage sand, and makes the determination of zirconium dioxide in drainage sand by EDTA complexometric titration The accuracy and precision of zirconia elements in quicksand are significantly improved, which can be applied to production inspection

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