Method for measuring content of selenium in molybdenum and molybdenum product

A product and content technology, applied in the field of determination of selenium content in molybdenum and molybdenum products, can solve the problems of difficulty in forming and cannot use molybdenum and molybdenum products to measure selenium content, and achieve the effects of high efficiency, simple operation and high sensitivity

Active Publication Date: 2014-03-19
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The object of the present invention is to provide a method for measuring selenium content in molybdenum and molybdenum products, which solves the problem that the existing hydride ge...

Method used

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  • Method for measuring content of selenium in molybdenum and molybdenum product
  • Method for measuring content of selenium in molybdenum and molybdenum product
  • Method for measuring content of selenium in molybdenum and molybdenum product

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Embodiment 1

[0036] The method for measuring selenium content in molybdenum and molybdenum products of the present invention comprises the steps:

[0037] The first step, sampling

[0038] Take the molybdenum bar to be determined. After preliminary determination, the mass fraction of selenium in the molybdenum bar is between 0.0001% and 0.0010%. The molybdenum bar is crushed, and then sieved with a standard sieve with a mesh diameter of 0.75mm Points, get samples;

[0039] The second step, prepare sample solution and sample blank solution

[0040] Take two beakers with a capacity of 150mL, put 0.5g of the sample prepared in the first step into one of the beakers, and add water to wet the sample, then add 15mL of hydrochloric acid with a concentration of 12.40mol / L to the two beakers Solution A and 5mL nitric acid solution with a concentration of 15.32mol / L, cover with a watch glass, heat two beakers to 150°C until the sample is completely dissolved, then add 5mL citric acid with a concen...

Embodiment 2

[0053] The method for measuring selenium content in molybdenum and molybdenum products of the present invention comprises the steps:

[0054] The first step, sampling

[0055] Take the molybdenum powder to be determined. After preliminary determination, the mass fraction of selenium in the molybdenum powder is between 0.0010% and 0.0020%. The molybdenum powder is divided three times according to the quartering method to obtain a sample;

[0056] The second step, prepare sample solution and sample blank solution

[0057] Take two beakers with a capacity of 150mL, put 0.10g of the sample prepared in the first step into one of the beakers, and add water to wet the sample, then add 15mL of hydrochloric acid with a concentration of 11.65mol / L to the two beakers Solution A and 5mL nitric acid solution with a concentration of 14.32mol / L, cover with a watch glass, heat two beakers to 180°C until the sample is completely dissolved, then add 5mL citric acid with a concentration of 800g...

Embodiment 3

[0070] The method for measuring selenium content in molybdenum and molybdenum products of the present invention comprises the steps:

[0071] The first step, sampling

[0072] Take the molybdenum powder to be determined. After preliminary determination, the mass fraction of selenium in the molybdenum powder is between 0.0030% and 0.0050%. The molybdenum powder is divided three times according to the quartering method to obtain a sample;

[0073] The second step, prepare sample solution and sample blank solution

[0074] Take two beakers with a capacity of 150mL, put 0.10g of the sample prepared in the first step into one of the beakers, and add water to wet the sample, and then add 15mL of hydrochloric acid with a concentration of 12mol / L to the two beakers Solution A and 5mL nitric acid solution with a concentration of 15mol / L, cover with a watch glass, heat two beakers to 170°C until the sample is completely dissolved, then add 5mL citric acid solution with a concentration ...

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Abstract

The invention discloses a method for measuring the content of selenium in molybdenum and a molybdenum product. The method comprises the following steps: sampling, preparing a sample solution and a sample blank solution, preparing a working curve solution, drawing a working curve, measuring the content of the selenium in the sample solution, and calculating. According to the method for measuring the content of the selenium in the molybdenum and the molybdenum product, provided by the invention, the problem that an existing hydride generation-atomic fluorescence spectrometry can not be applied to the measurement of the content of the selenium in the molybdenum and the molybdenum product because the selenium hydride of the molybdenum is difficult to form is solved. The method provided by the invention is simple and convenient to operate, high in efficiency and high in sensitivity; and the detection limit is 0.13ng/mL, the recovery rate is 90.23 percent-105.1 percent, and the measurement range of the content of the selenium is 0.0001-0.0050 percent.

Description

technical field [0001] The invention belongs to the technical field of analysis of trace impurity elements, and specifically relates to a method for measuring selenium content in molybdenum and molybdenum products. Background technique [0002] With the development of industry, new materials are constantly introduced, and the requirements for the composition of various materials with excellent performance are becoming more and more stringent. The content of impurity elements in metals is very important to the performance of materials. As high-purity raw materials, molybdenum and molybdenum products must first control the impurity composition of the raw materials. Only high-purity raw materials can smelt high-purity high-quality materials. According to the requirements, the content of selenium in molybdenum and molybdenum products shall not exceed ten parts per million (10ppm). [0003] According to the different selenium content determined, the commonly used methods for det...

Claims

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Application Information

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IPC IPC(8): G01N21/64G01N1/28
Inventor 谢明明王峰蔺佰潮
Owner JINDUICHENG MOLYBDENUM CO LTD
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