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Method for determining vanadium in silicon-vanadium alloy

A technology of silicon-vanadium alloy and determination method, which is applied in the field of analytical chemistry and can solve problems such as analysis deviation of vanadium content

Active Publication Date: 2015-06-03
RUI STEEL INDAL OF PANZHIHUA GANGCHENG GROUP
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  • Application Information

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Problems solved by technology

[0002] Silicon and vanadium in silicon-vanadium alloys mainly exist in the form of simple substances, which contain a small amount of silicon-vanadium eutectic; in chemical analysis, simple silicon and vanadium elements are easily soluble in acid, but silicon-vanadium eutectic is difficult to dissolve Acid solution dissolves, causing analysis deviation of vanadium content

Method used

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  • Method for determining vanadium in silicon-vanadium alloy
  • Method for determining vanadium in silicon-vanadium alloy
  • Method for determining vanadium in silicon-vanadium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 0.1500g of silicon-vanadium alloy standard sample (model SL25--09) and place it in a 500mL conical flask, add about 10ml of water to wet the sample, add 10ml of concentrated nitric acid, 5ml of concentrated hydrochloric acid and 5ml of hydrofluoric acid , Dissolve the sample at room temperature, then add 40ml of sulfuric acid (1:1) and place it on an electric furnace to heat until the sample is completely dissolved and evaporated until sulfuric acid fumes are emitted for 2-3 minutes Take it off, cool down, add 10ml of phosphoric acid (1:1) and 80ml of water, heat to dissolve the salt, remove from the boil and cool to room temperature;

[0026] Add 5 ml of ammonium ferrous sulfate to the sample and mix well, directly add potassium permanganate solution dropwise until the solution appears purple-red after shaking and does not disappear, and excessive 1-2 drops shake fully and let stand for 5 minutes, add 1 g of urea, Then add sodium nitrite solution dropwise until t...

Embodiment 2

[0030] Example 2: Weigh 0.1500g silicon-vanadium alloy standard sample (model SL25--09) and adopt the test method of Example 1. The difference from Example 1 is that no hydrofluoric acid is added. The obtained results are shown in Table 1.

Embodiment 3

[0031] Example 3: Weigh 0.1500g of silicon-vanadium alloy 1# sample and test it by the method of Example 1, and the results are shown in Table 1.

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Abstract

The invention belongs to the field of analytical chemistry, and particularly relates to a method for determining vanadium in a silicon-vanadium alloy. According to the method for determining vanadium in a silicon-vanadium alloy, the vanadium is determined by a steel and alloy chemical analysis method-ammonium ferrous sulfate titration method, and hydrofluoric acid is added after concentrated hydrochloric acid is added. Through the invention, the defect of relatively low determination result is overcome, and an accurate method for determining vanadium in a silicon-vanadium alloy is obtained.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, and in particular relates to a method for determining vanadium in silicon-vanadium alloys. Background technique [0002] Silicon and vanadium in silicon-vanadium alloys mainly exist in the form of simple substances, which contain a small amount of silicon-vanadium eutectic; in chemical analysis, simple silicon and vanadium elements are easily soluble in acid, but silicon-vanadium eutectic is difficult to dissolve The acid solution dissolves, causing analytical bias in the vanadium content. Contents of the invention [0003] In view of the above-mentioned defects, the present invention provides a method for determining vanadium in silicon-vanadium alloys, by which the content of vanadium in silicon-vanadium alloys can be accurately determined. [0004] Technical scheme of the present invention is: [0005] The determination method of vanadium in silicon-vanadium alloy is determined accordin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78
Inventor 覃源周芸屹许立志陈扬丽邓晓兰
Owner RUI STEEL INDAL OF PANZHIHUA GANGCHENG GROUP
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