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Method for measuring content of calcium and magnesium in molybdenum trioxide, ammonium molybdate, molybdenum powder and molybdenum product

A technology of molybdenum trioxide and a determination method, which is applied in the field of content determination of calcium, ammonium molybdate and magnesium in molybdenum trioxide, molybdenum powder and molybdenum products, can solve the problem of low precision of measurement results, high lower limit of measurement, inability to measure quickly, etc. problem, to achieve the effect of simple operation, high sensitivity and high efficiency

Inactive Publication Date: 2016-03-02
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for determining the content of calcium and magnesium in molybdenum trioxide, ammonium molybdate, molybdenum powder and molybdenum products, which solves the problems of high determination lower limit, low precision of determination results and inability to quickly determine the existing determination methods. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The method for measuring calcium and magnesium content in molybdenum trioxide sample, concrete implementation steps are:

[0049] The first step, sample weighing

[0050] Weigh 0.75g molybdenum trioxide sample (accurate to 0.0001g);

[0051] The second step, prepare sample solution and sample blank solution

[0052] Take two beakers, put the molybdenum trioxide sample weighed in the first step in one beaker, and put the sample in the other beaker, then add 20mL of 30% hydrogen peroxide solution into the two beakers, and heat at 500°C Two beakers until the sample is completely dissolved, then add 5mL nitric acid solution A to the two beakers and boil, then remove the two beakers to cool, when the solutions in the two beakers are cooled to room temperature, rinse the walls of the beakers with water, and then put the two beakers The solutions in each beaker were respectively transferred to two 100mL volumetric flasks, and finally diluted with water to the mark line, and ...

Embodiment 2

[0070] The method for measuring calcium, magnesium content in the ammonium molybdate sample, concrete implementation steps are:

[0071] The first step, sample weighing

[0072] Weigh 1g of ammonium molybdate sample (accurate to 0.0001g);

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

[0074] Take two beakers, put the molybdenum trioxide sample weighed in the first step in one beaker, and put the sample in the other beaker, then add 2mL of 30% hydrogen peroxide solution into the two beakers, and heat at 400°C Two beakers until the sample is completely dissolved, then respectively add 1mL of nitric acid solution A to the two beakers and boil, then remove the two beakers to cool, when the solutions in the two beakers are cooled to room temperature, rinse the walls of the beakers with water, and then put the two beakers The solutions in each beaker were respectively transferred to two 50mL volumetric flasks, and finally diluted with water to the ma...

Embodiment 3

[0092] The method for measuring calcium, magnesium content in the molybdenum powder sample, concrete implementation steps are:

[0093] The first step, sample weighing

[0094] Weigh 0.5g molybdenum powder sample (accurate to 0.0001g);

[0095] The second step, prepare sample solution and sample blank solution

[0096] Take two beakers, put the molybdenum trioxide sample weighed in the first step in one beaker, and put the sample in the other beaker, then add 5mL of 30% hydrogen peroxide solution into the two beakers, and heat at 300°C Two beakers until the sample is completely dissolved, then add 2.5mL of nitric acid solution A to the two beakers and boil, then remove the two beakers to cool, when the solutions in the two beakers are cooled to room temperature, rinse the beaker wall with water, then Transfer the solutions in the two beakers into two 100mL volumetric flasks respectively, and finally dilute with water to the mark line, and mix well to prepare sample solution ...

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Abstract

The invention discloses a method for measuring the content of calcium and magnesium in molybdenum trioxide, ammonium molybdate, molybdenum powder and a molybdenum product. The method comprises the steps of weighing out a sample, preparing a sample solution and a sample blank solution, preparing a working curve solution, drawing a working curve, measuring the content of calcium and magnesium in the sample solution and carrying out calculation. The method for measuring the content of calcium and magnesium in molybdenum trioxide, ammonium molybdate, molybdenum powder and the molybdenum product is easy and convenient to operate, high in efficiency and high in flexibility, the detecting limit of calcium is 0.65 mg / L, the detecting limit of magnesium is 0.43 mg / L, the recovery rate of calcium ranges from 91.25% to 101.2%, the recovery rate of magnesium ranges from 95.5% to 100.6%, the measuring range of calcium is 0.0001% to 0.0100%, and the measuring range of magnesium is 0.0001% to 0.0100%. The method is suitable for scientific research and industrial production, and is especially more suitable for industrial production requiring the fast sample measuring result.

Description

technical field [0001] The invention belongs to the technical field of analysis of trace impurity elements, and in particular relates to a method for determining the content of calcium and magnesium in molybdenum trioxide, ammonium molybdate, molybdenum powder and molybdenum products. Background technique [0002] Molybdenum trioxide, ammonium molybdate, molybdenum powder and molybdenum products are high-purity products in the molybdenum industry, and the requirements for the analysis and detection of impurity elements in these products are getting higher and higher. However, most of the existing analysis methods for calcium and magnesium content in molybdenum trioxide, ammonium molybdate, molybdenum powder and molybdenum products are complicated, with low analysis precision and long time. [0003] At present, the national standard analysis method for calcium and magnesium content in molybdenum trioxide, ammonium molybdate, molybdenum powder and molybdenum products is flame ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/28G01N1/38G01N1/44
CPCG01N21/73G01N1/28G01N1/38G01N1/44
Inventor 谢明明杨红忠
Owner JINDUICHENG MOLYBDENUM CO LTD
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