Analyzing and detecting method for content of microelements in dedicated ferric oxide powder standard sample

Abstract

The invention discloses an analyzing and detecting method for the content of microelements in a dedicated ferric oxide powder standard sample. The method comprises the following steps: taking low-quality ferric oxide powder as the sample, and controlling the content of each microelement in the sample; accurately weighing the sample, adding concentrated hydrochloric acid, heating to dissolve, removing into a volumetric flask, and diluting with water so as to obtain a sample liquid; weighing 5 parts of high-purity iron powder, adding concentrated hydrochloric acid, heating to dissolve, respectively removing into five volumetric flasks, respectively adding a standard solution of each microelement according to different amount into the five volumetric flasks, diluting with water, agitating uniformly, and respectively carrying out spectral line intensity measurement on each microelement so as to obtain a working curve; uniformly mixing the sample liquid and measuring the line strength of each microelement, and obtaining the content of each microelement in the sample through the working curve. The content of each microelement in the ferric oxide powder standard sample, obtained by the method, satisfies the requirement of the microelement analysis and detection in the ferric oxide powder, and the method can be used for performing quality control in ferric oxide powder analysis and detection and used for evaluating and revising detecting instruments, and effectively improves the efficiency of analysis and detection.

Description

technical field [0001] The invention relates to an analysis and detection method for trace element content in a standard sample of special iron oxide powder. Background technique [0002] The metallurgical industry is very important to the analysis and detection of iron oxide powder. It usually uses inductively coupled plasma emission spectrometer (ICP-AES) to implement analysis and detection operations to evaluate the quality of iron oxide powder and detect the content of trace elements in it; while oxidation The iron powder standard sample is the reference standard in the detection of iron oxide powder, which can be used for the calibration of testing instruments and the supervision of the quality of iron oxide powder. At present, ICP-AES is used to detect the content of 14 trace elements in iron oxide powder, but there is a lack of standard samples of iron oxide powder containing 14 trace elements. Therefore, in the analysis of iron oxide powder and the detection of trace...

AI Technical Summary

Problems solved by technology

This method has two major defects: 1. 14 element standard solutions must be added to the pure iron oxide powder sample solution for each operation, which is cumbersome and inefficient.

2. Due to the influence of the matrix in the standard solution, for example, the standard solution of Si has pure SiO 2 Prepared by melting and melting anhydrous Na2CO3, there are Na ions in the standard solution of Si, and Na ions are one of the trace elements that need to be determined, so it will affect the determination results of Na ions