Method for measuring concentration of beryllium and beryllium compound in air in workplace

Abstract

The invention discloses a method for measuring the concentration of beryllium and a beryllium compound in air in a workplace. According to the method, a microporous membrane is used to collect an airsample, and a dust-exposed face of the microporous membrane is inward folded twice and well arranged; after sampling, the microporous membrane is put in a beaker, a nitric acid digestion solution is added, the beaker is slowly heated for digestion while it is ensured that the digestion solution isn't boiled till the solution is almost dried, and such process is repeatedly carried out till the color of the solution becomes light or constant; after cooling, a nitric acid solution is added, continuous heating is carried out to dissolve the residue, pure water is added for reaching a constant volume, and the solution is kept for 1% of nitric acid acidity; and analysis parameters of a plasma spectrometer are optimized, the concentration of beryllium and a beryllium compound in the sample solution is measured, and the concentration of beryllium and a beryllium compound in a workplace can be converted according to the beryllium concentration and actual sampling volume of the sample solution.The method is greatly improved in measurement efficiency, has strong anti-interference capability and relatively high sensitivity and precision, is improved in accuracy and stability of measurement, and provides technical assurance for satisfying occupational health management.

Description

technical field [0001] The invention relates to a method for measuring the concentration of beryllium and its compounds in the air of a workplace. Background technique [0002] Beryllium and its compounds are mainly used in the manufacture of special steel for nuclear power engineering, rocket and aircraft manufacturing. Beryllium alloys are also widely used in the electronics industry and the production of instrumentation parts. Therefore, in the fields of smelting, mining, manufacturing of special materials, production of radio equipment and instrument parts, etc., beryllium, as a highly toxic occupational hazard factor, often attracts people's attention. Due to the strong toxicity of beryllium and its compounds, even a very small amount will irritate the human skin and mucous membranes due to contact and breathing, induce inflammation of the conjunctiva and cornea, and cause occupational injuries such as emphysema and pneumonia. Inhalation is relatively high The content...

AI Technical Summary

Problems solved by technology

[0005] In actual production, the content of beryllium and its compounds in industrial sites is very low, and the concentration of the solution is often only 0.01-0.1μg / ml. The cumbersome operation cannot guarantee the accuracy and stability of the determination of trace beryllium. The health of the workers on the production site of its compound is very terrible, and it cannot meet the requirements of occupational health management.

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