Method for measuring zirconium and its compound in air of workplace

Abstract

The invention discloses a method for measuring zirconium and its compound in the air of a workplace. The method comprises a step of sampling the air in the workplace by using a microporous membrane, folding a dust-collecting surface of the microporous membrane inward twice after sampling and placing the microporous membrane in a clean container, a step of placing the sampled microporous membrane in a beaker, adding pure water and a hydrofluoric acid digestion solution, slowly heating to dissolve to a residue, finally adding pure water to determine the volume such that solution maintains a certain hydrofluoric acid acidit, a step of analyzing a pretreated air sample by using an inductively coupled plasma mass spectrometry to measure the content of the zirconium in the air sample, and a stepof calculating a standard sampling volume and the concentration of the zirconium in the air according to a formula. The method adopts simple and suitable digestion technology and digestion conditions, so that a water-soluble zirconium compound sample and a water-insoluble zirconium compound sample in the microporous membrane can be simultaneously pretreated and digested without separate operation, therefore, the detection efficiency is improved, the analysis of a trace amount, ultra-trace zirconium and its compound are achieved, and an accurate and reliable result is ensured.

Description

technical field [0001] The invention relates to the technical field of chemical detection, in particular to a method for determining zirconium and its compounds in the air of a workplace. Background technique [0002] Zirconium is a high melting point metal, mainly zirconia (ZrO 2 ) form, it is a high-grade refractory raw material with good thermal stability, which can improve the chemical stability and acid and alkali resistance of glaze. In industry, it is mainly used for piezoelectric ceramics, daily-use ceramics, refractory materials and other products. It is also used for the production of steel and non-ferrous metals, optical glass and zirconia fibers, as well as for the manufacture of ultra-high temperature heat insulation protection materials and ceramic matrix composite reinforcement. Material. Zirconium and its compounds are widely used in ceramic sintering, metal smelting, pyrolysis, semiconductor manufacturing, quartz melting and other fields. Zirconium and it...

AI Technical Summary

Problems solved by technology

The inability to accurately measure zirconium and its compounds in the air of industrial sites is very terrible for the health of workers on the production site, and cannot meet the requirements of occupational health management

However, the detection limit of this method is 0.002 μg / ml, and the lower limit of quantification is 0.007 μg / ml, while the content of zirconium and its compounds in the air of most industrial sites in the steel and chemical industries is very low, and the solution concentration is only 0.01 μg / ml It is close to the quantitative lower limit of zirconium determined by plasma spectroscopy, which also has a great impact on the accuracy of trace and ultra-trace zirconium determination, and cannot meet the precise management requirements of occupational health

Images