Method for determining content of nickel in nickel ferrite

Abstract

The invention discloses a method for determining the content of nickel in nickel ferrite. The method comprises the following steps of: (1) accurately weighing a nickel ferrite sample, decomposing the nickel ferrite sample by using dilute nitrohydrochloric acid, and dissolving the treated sample by fuming perchloric acid to obtain a sample solution; (2) treating a standard sample by using a method adopted in the step (1), determining the spectral line intensity of an obtained standard sample solution, and drawing a standard curve of the spectral line intensity-nickel content; and (3) determining the spectral line intensity of the nickel in a sample test solution so as to obtain the content of the nickel in the sample according to the standard curve. The sample is dissolved by using the dilute nitrohydrochloric acid and the perchloric acid, and the matrix interference is reduced by fuming the perchloric acid, so that the analysis can be performed by using the inductively coupled plasma-atomic emission spectrometry (ICP-AES), the defects of complex operation and long analysis cycle of a chemical wet method are overcome, and the method has the advantages of high sensitivity, low interference, quickness in analysis, and accurate and reliable analysis result, and is applicable to the daily analysis detection of an enterprise.

Description

technical field [0001] The invention relates to a method for determining the content of an alloy, in particular to a method for determining the content of nickel in ferronickel. Background technique [0002] Ferronickel is mainly used as an additive of nickel element instead of nickel plate in steelmaking. Adding nickel to the steel can make the steel have higher comprehensive mechanical properties - improve the strength and low temperature impact toughness of the steel in the quenched and tempered heat treatment state, and improve the temper brittleness of the steel. Nickel is widely used in combination with other alloying elements to produce stainless steel, heat-resistant steel, and alloy structural steel. With the rapid development of stainless steel production, the demand for ferronickel is increasing. [0003] Usually, the nickel element in ferronickel is analyzed by chemical wet method. The existing national standard "GB / T 21933.1-2008 Determination of the Content o...

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Problems solved by technology

[0003] Usually, the nickel element in ferronickel is analyzed by chemical wet method. The existing national standard "GB / T 21933.1-2008 Determination of the Content of Nickel, Iron and Nickel by Diacetyl Oxime Gravimetric Method" completely adopts the traditional chemical wet method, and the reagents used are relatively Many, cumbersome and complicated operation steps, long analysis cycle, unable to meet the needs of rapid and accurate detection of ferronickel components, not suitable for daily analysis and detection of enterprises

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