Method for determining content of impurity elements in ferric oxide with X-ray fluorescence spectrum in filter paper sheets

A technology of impurity elements and fluorescence spectroscopy, which is used in the field of X-ray fluorescence spectroscopy to determine the content of impurity elements in iron red, and can solve test errors (need to evaluate the uncertainty, the deviation between the true value of the element content and the standard value, no iron oxide powder, etc. problem, to achieve the effect of fast measurement speed, simple operation and less acid consumption

Inactive Publication Date: 2019-02-12
HUNAN AEROSPACE MAGNET & MAGNETO
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Problems solved by technology

Disclosed in CN102269719 B is a method for measuring impurity content in iron oxide by X-ray fluorescent tablet method, but iron oxide powder needs to be used to press standard samples in this method, and there is no national standard material for iron oxide powder in the industry, so This technical solution is only a test method for the impurity content of ideal iron oxide
On the one hand, chemical method, ICP-OES method and other test methods are used to analyze and determine the element content in iron oxide powder. Taking the test data as the element standard value may introduce test errors (need to evaluate the uncertainty), which will cause the element content to be true. value and the standard value; on the other hand, using different powders for dry mixing to prepare standard samples, especially when the content of the elements to be measured is low, it is easy to cause uneven composition of each element in the mixed powder , causing deviations in the local components

Method used

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  • Method for determining content of impurity elements in ferric oxide with X-ray fluorescence spectrum in filter paper sheets
  • Method for determining content of impurity elements in ferric oxide with X-ray fluorescence spectrum in filter paper sheets
  • Method for determining content of impurity elements in ferric oxide with X-ray fluorescence spectrum in filter paper sheets

Examples

Experimental program
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Effect test

Embodiment 1

[0020] 1) Production of a series of standard samples and samples to be tested:

[0021] Take manganese oxide and aluminum oxide with a purity of 99.99% and dissolve them with hydrochloric acid to make standard solutions of manganese ions and aluminum ions. The concentrations of both manganese ions and aluminum ions are 1000 μg / ml; Concentrated hydrochloric acid dissolves to form an iron ion solution. Repeat this step to prepare three iron ion solutions of the same volume and concentration; pipette 1ml of manganese oxide solution and 0.2ml of aluminum oxide solution into a 25ml volumetric flask with a pipette gun, and add 1 part of iron ion solution, add water to constant volume to form a series of standard solutions 1; respectively pipette 2ml of manganese oxide solution and 0.4ml of aluminum oxide solution into another 25ml volumetric flask, add 1 part of iron ion solution, add water to constant volume to form a series of standard solutions 2. Pipette 5ml of manganese oxide s...

Embodiment 2

[0030] The difference between this example and Example 1 is that a series of standard solutions are prepared by using single-element national standard solutions of manganese (GSB G 62019-90) and aluminum (GSB 04-1713-2004), and the others are the same as in Example 1.

[0031] In order to verify the accuracy of this method, the national standard solution was used to prepare standard samples with known components to verify the accuracy of this method. The experimental results are shown in Table 1. It can be seen from the experimental results that the accuracy of the experimental data is good. within range.

[0032] At the same time, in order to verify the precision of this method, the same sample was repeatedly measured 10 times, and the stability of this method was investigated from the precision of the test data. From the data in Table 2, MnO and Al 2 o 3 The relative standard deviations are all less than 3%, indicating that the testing process of this method is stable and r...

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Abstract

The invention discloses a method for determining content of impurity elements in the ferric oxide with an X-ray fluorescence spectrum in filter paper sheets. The determination comprises the followingsteps: (1) preparing a series of standard sample solution; (2) preparing a sample solution to be detected; (3) preparing a series of standard sample and the sample to be tested; (4) leveling a seriesof standard samples and the sample to be detected; (5) obtaining a calibration curve through a series of standard samples; and(6) obtaining the content of the impurity elements to be detected in the ferric oxide sample, according to the calibration curve. According to the method for determining content of impurity elements in the ferric oxide with the X-ray fluorescence spectrum in filter paper sheets, the method is simple to operate, high in determination speed, less in acid consumption, accurate in measurement, and easy to treat the waste liquid.

Description

technical field [0001] The invention relates to an X-ray fluorescence spectrum analysis method, in particular to a method for measuring the content of impurity elements in iron red by X-ray fluorescence spectrum. Background technique [0002] Iron red (the main component is iron oxide) is a widely used industrial raw material, mainly used in the electronic industry, communication machines, televisions, computers and other magnetic materials, line output transformers, switching power supplies and their high U and high UQ, etc. Ferrite cores can also be used as ingredients for analytical reagents, catalysts, polishing agents and pigments. The determination of impurity elements in industrial iron oxide generally adopts inductively coupled plasma atomic emission spectrometry, but the standard solution preparation process of this method is complicated, the validity period is short, the calibration curve needs to be re-established before each test, the test period is long, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/223
CPCG01N23/223
Inventor 陈晓宇黄小琴刘超肖丹
Owner HUNAN AEROSPACE MAGNET & MAGNETO
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