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Method for measuring tungsten content in ferromolybdenum through inductively coupled plasma atomic emission spectrometry

An atomic emission spectrometry and plasma technology is applied in the field of plasma atomic emission spectrometry for the determination of tungsten content in ferromolybdenum, achieving the effect of simple operation, less interference factors and good measurement accuracy

Inactive Publication Date: 2017-09-29
MAANSHAN IRON & STEEL CO LTD
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Problems solved by technology

There is also no data report on the determination of tungsten in ferromolybdenum by inductively coupled plasma atomic emission spectrometry

Method used

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  • Method for measuring tungsten content in ferromolybdenum through inductively coupled plasma atomic emission spectrometry
  • Method for measuring tungsten content in ferromolybdenum through inductively coupled plasma atomic emission spectrometry

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Embodiment 1

[0031] The method for measuring tungsten content in molybdenum iron by inductively coupled plasma atomic emission spectrometry, said method may further comprise the steps:

[0032] (1) Prepare the solution to be tested: weigh 0.200 g of the ferromolybdenum sample, place it in a 100ml steel dual-purpose bottle, add 5mL of nitric acid and 1mL of hydrochloric acid, heat at 300°C to 400°C until the ferromolybdenum sample dissolves, then cool slightly. Add 1mL of sulfuric acid and 1mL of phosphoric acid, heat until white smoke of sulfuric acid is emitted, continue to heat for 30S, cool slightly, add 2mL of hydrochloric acid, boil until the salt is completely dissolved, after cooling, dilute to 100mL with deionized water, and mix well Prepare the solution to be tested;

[0033] (2) Preparation of standard series solutions: Dissolve seven groups of 0.12g metal molybdenum and 0.07g high-purity iron with 5mL concentrated nitric acid respectively, transfer them into a 100mL single-scale...

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Abstract

The invention discloses a method for measuring the tungsten content in ferromolybdenum through an inductively coupled plasma atomic emission spectrometry. The method comprises the following steps: dissolving a to-be-measured ferromolybdenum sample to prepare a to-be-measured solution; dissolving molybdenum and high-purity iron, and adding tungsten standard solutions of different volume to a system separately to prepare standard series of solutions; introducing the standard series of solutions into an inductively coupled plasma atomic emission spectrometer, measuring the analytical line strength of a tungsten element in the standard series of solutions from low concentration to high concentration, drawing a working curve by employing the mass fraction of the tungsten element as a horizontal ordinate and the analytical line strength as a vertical coordinate to obtain a linear equation; introducing the to-be-measured solution into the inductively coupled plasma atomic emission spectrometer and measuring the analytical line strength of the tungsten element in the to-be-measured solution; and calculating the mass fraction of the tungsten element in the to-be-measured solution according to the linear equation. The method has the characteristics of a low detection limit, small matrix interference, a wide linear range and high sensitivity and accuracy, and the detection limit can reach 0.0014%.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, and in particular relates to a method for measuring tungsten content in ferromolybdenum by inductively coupled plasma atomic emission spectrometry. Background technique [0002] P91 steel has requirements for the content of tungsten element, and most of the tungsten element is brought into ferromolybdenum during the refining process. Therefore, it is of great significance to accurately determine the content of tungsten in ferromolybdenum for smelting and product quality control. [0003] Among the existing chemical analysis methods for ferromolybdenum, there is no detection method for tungsten in ferromolybdenum in the Chinese national standard. There is also no data report on the determination of tungsten in ferromolybdenum by inductively coupled plasma atomic emission spectrometry. Contents of the invention [0004] Based on the above background, the present invention provides a m...

Claims

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Application Information

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IPC IPC(8): G01N21/62
CPCG01N21/62
Inventor 陆军宋祖峰荚江霞王昔文
Owner MAANSHAN IRON & STEEL CO LTD
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