Method for determining content of phosphor in ferrotungsten

A method of determination, technology of phosphorus content, applied in the direction of measuring device, preparation of test samples, material analysis through electromagnetic means, etc., can solve problems such as long time required, cumbersome procedures, interference, etc., and achieve simple preparation process and detection The effect of simple process and material cost saving

Inactive Publication Date: 2012-12-19
ANGANG STEEL CO LTD
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Problems solved by technology

First of all, some methods must separate phosphorus from matrix elements, or even perform secondary separation. The procedure is cumbersome and takes a long time. An analysis cycle is about 8 hours, which is not suitable for daily production inspection; the second is the separation. Beryllium salts are highly toxic, causing serious pollution and poisoning to the environment and experimental operators
The third is that although using phosphomolybdenum heteropoly acid-mal

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  • Method for determining content of phosphor in ferrotungsten
  • Method for determining content of phosphor in ferrotungsten
  • Method for determining content of phosphor in ferrotungsten

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Embodiment Construction

[0012] The technical solution involved in the present invention will be further described below in conjunction with specific examples, but it is not intended to limit the content of the invention.

[0013] Taking the determination of phosphorus content in the national standard sample GBW 01428 ferrotungsten as an example, the technical scheme involved in the invention is described in detail.

[0014] a Sample treatment: Weigh 0.1000g sample into a polytetrafluoroethylene beaker, add 5mL high-purity concentrated nitric acid, 2mL high-purity concentrated hydrochloric acid, 1mL hydrofluoric acid, heat to dissolve at low temperature (200℃~250℃), and cool completely Finally, set the volume in a 100mL plastic volumetric flask as the solution to be tested.

[0015] b Preparation of blank solution: Add 5mL of high-purity concentrated nitric acid, 2mL of high-purity concentrated hydrochloric acid, and 1mL of hydrofluoric acid into a polytetrafluoroethylene beaker, heat to dissolve at l...

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Abstract

The invention discloses a method for determining the content of phosphor in ferrotungsten and especially relates to a method for determining the content of phosphor in ferrotungsten by the utilization of an inductively coupled plasma mass spectrometer (ICP-MS). The method comprises the following concrete processes: a, sample processing; b, preparation of a blank solution; c, preparation of a standard solution of a working curve; and d, testing and data processing. According to the invention, separation of phosphor and a matrix is not required; the preparation process of a test solution is simple; analysis time is shortened; material cost is saved; and the pollution of a toxic reagent beryllium salt used in a traditional analysis method to experimenters and the environment is avoided. The method is nontoxic and harmless to experimenters and will not lead to environmental pollution problems. The detection process is simple, and polyatomic ion interference existing in the detection process can be eliminated by a matrix matching method.

Description

technical field [0001] The invention relates to a method for measuring phosphorus content in ferro-tungsten, in particular to a method for measuring the phosphorus content in ferro-tungsten by using an inductively coupled plasma mass spectrometer (ICP-MS), and belongs to the technical field of iron and steel metallurgy analysis. Background technique [0002] Phosphorus content must be strictly controlled in order to increase the first-grade product rate during ferrotungsten smelting. For the determination of phosphorus in ferrotungsten, classical chemical analysis methods are often used, such as (1) GB 7731.4-1987 "Chemical Analysis Method of Ferrotungsten for the Determination of Phosphorus by Molybdenum Blue Photometry" Acid treatment to emit white smoke, dissolve soluble salts with water, cover iron with EDTA, add beryllium sulfate, make phosphorus form ammonium phosphate beryllium and beryllium hydroxide co-precipitate in ammonia solution, dissolve the precipitate with h...

Claims

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Application Information

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IPC IPC(8): G01N27/62G01N1/28
Inventor 王铁亢德华于媛君戚淑芳
Owner ANGANG STEEL CO LTD
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