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A kind of determination method of vanadium in vanadium nitrogen alloy

A technology of vanadium nitrogen alloy and determination method, which is applied in the field of analytical chemistry, can solve problems such as long analysis process, and achieve the effects of wide detection range, fewer types of reagents, and easy operation

Inactive Publication Date: 2011-12-21
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, there is a national standard (GB20567-2006-T) for the determination of vanadium in vanadium-nitrogen alloys, but this method has disadvantages and deficiencies such as the use of many types of reagents in the determination process and the long analysis process.

Method used

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  • A kind of determination method of vanadium in vanadium nitrogen alloy
  • A kind of determination method of vanadium in vanadium nitrogen alloy
  • A kind of determination method of vanadium in vanadium nitrogen alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Weigh 0.1000g vanadium nitrogen alloy 1 # Put the sample in a 500mL Erlenmeyer flask, add 40mL of sulfuric acid-phosphoric acid-nitric acid mixture, heat to dissolve, drive away the nitrogen oxides, and then remove it. Dilute to 90mL with water, add 20mL ammonium persulfate solution (25%), boil until big bubbles appear, boil for 2min, remove and cool, add 3 drops of N-phenyl anthranilic acid solution indicator, immediately Ferrous ammonium sulfate standard solution drops until the purple red turns bright green as the end point. The content of vanadium in the sample was calculated, and the results are shown in Table 7.

[0055] The mass percentage of vanadium is calculated according to the following formula:

[0056] w ( V ) % = C × V × 50.94 1000 × ...

Embodiment 2

[0063] Weigh 0.1000g vanadium nitrogen alloy 2 # Put the sample in a 500mL Erlenmeyer flask, add 40mL of sulfuric acid-phosphoric acid-nitric acid mixture, heat to dissolve, drive away the nitrogen oxides, and then remove it. Dilute to 90mL with water, add 20mL ammonium persulfate solution (25%), boil until big bubbles appear, boil for 2min, remove and cool, add 3 drops of N-phenyl anthranilic acid solution indicator, immediately Ferrous ammonium sulfate standard solution drops until the purple red turns bright green as the end point. Calculate the content of vanadium in the sample, the calculation formula is the same as in Example 1, and the results are shown in Table 7.

Embodiment 3

[0065] Weigh 0.1000g ferrovanadium standard sample 3 # Put the sample in a 500mL Erlenmeyer flask, add 40mL of sulfuric acid-phosphoric acid-nitric acid mixture, heat to dissolve, drive away the nitrogen oxides, and then remove it. Dilute to 90mL with water, add 20mL ammonium persulfate solution (25%), boil until big bubbles appear, boil for 2min, remove and cool, add 3 drops of N-phenyl anthranilic acid solution indicator, immediately Ferrous ammonium sulfate standard solution drops until the purple red turns bright green as the end point. Calculate the content of vanadium in the sample, the calculation formula is the same as in Example 1, and the results are shown in Table 7.

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Abstract

A method for measuring vanadium in vanadium-nitrogen alloy belongs to the technical field of analytical chemistry. The advantages of this method lie in that the reagents used in the determination process are few in type, the time is short, the operation is simple, and the method has high precision and accuracy, and is especially suitable for the analysis of a large number of samples. The present invention adopts mixed acid to dissolve the sample, under the acidity of 12% to 25%, adding ammonium persulfate to oxidize vanadium (IV) to pentavalent, using N-phenyl-substituted anthranilic acid as an indicator, using ferrous ammonium sulfate as an indicator Standard solution titration. Chromium, manganese and cerium do not interfere with the determination.

Description

1. Technical field [0001] The invention belongs to the technical field of analytical chemistry and relates to a quantitative analysis technique for vanadium in vanadium-nitrogen alloys. 2. Background technology [0002] At present, there is a national standard (GB20567-2006-T) for the determination of vanadium in vanadium-nitrogen alloys, but this method has disadvantages and shortcomings such as the use of many reagents in the determination process and the long analysis process. In view of the above problems, it is necessary and meaningful to provide an accurate, fast, easy-to-operate, less reagent, and short process method for the determination of vanadium in vanadium-nitrogen alloys through experiments. 3. Contents of the invention [0003] The purpose of the invention is to disclose a method for measuring the vanadium content in the vanadium-nitrogen alloy, and the method can accurately measure the vanadium content in the vanadium-nitrogen alloy. [0004] First, throu...

Claims

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Application Information

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IPC IPC(8): G01N31/22G01N31/20
Inventor 丁美英高志国张素兰石琳
Owner INNER MONGOLIA BAOTOU STEEL UNION
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