Inductive coupling plasma atomic emission spectrometry for determining silver in aluminum alloy

Abstract

The invention discloses an inductive coupling plasma atomic emission spectrometry for determining silver in an aluminum alloy and provides an analysis method for determining the silver by using the inductive coupling plasma atomic emission spectrometry (ICP-AES) after an aluminum alloy sample is dissolved with acid. The conditions of selection of a sample dissolving acid, interferences on a base body and coexistence elements and the like are discussed. A result shows that a silver analysis spectral line is drawn by selecting 328.028nm wavelength spectral lines after the aluminum alloy sample is dissolved with nitric acid (1+1) and hydrofluoric acid, the volume of the obtained solution is made constant, and the solution is tested by using the ICP-AES, and the interferences on the base body and the coexistence elements can be avoided. The detection limit of the method is 0.0044 microgram / millimeter; and the analysis results of five average atomic absorption spectrometrys are consistent. The method can be used for determining the sample with the silver range of 0.0024%-0.273% in the aluminum alloy and is suitable for quality control of a production field.

Description

[0001] technical field [0002] The invention belongs to the technical field of casting, and in particular relates to an inductively coupled plasma atomic emission spectrometry for determining silver in aluminum alloys. [0003] Background technique [0004] At present, the determination methods of silver in aluminum alloys include flame atomic absorption spectrometry, catalytic manganese-persulfuric acid reaction system method and inductively coupled plasma atomic emission spectrometry. The accuracy and precision of the determination of silver by flame atomic absorption spectrometry are high, but the use of hydrochloric acid and hydrogen peroxide to dissolve the sample, if the operation is not proper, it is easy to produce silver chloride precipitation, resulting in low analysis results. The catalytic manganese-persulfuric acid reaction system method is a national industry standard method, and its determination range is between 0.00002% and 0.00010%. In addition to the...

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Problems solved by technology

The accuracy and precision of the determination of silver by flame atomic absorption spectrometry are high, but hydrochloric acid and hydrogen peroxide are used to dissolve the sample. If the operation is not done properly, it is easy to produce silver chloride precipitation, resulting in low analysis results.

Catalyzed manganese-persulfuric acid reaction system method is a national industry standard method, and its measurement range is between 0.00002% and 0.00010%. In addition to the narrow measurement range, there are also disadvantages such as cumbersome analysis steps, long analysis time and poor operability.