Method for determining content of phosphor in ferrotungsten

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...

AI Technical Summary

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-malachite green spectrophotometric method to measure phosphorus, adding an appropriate amount of citric acid can allow the existence of a large amount of tungsten, but the acidity, the amount of chromogenic agent, and temperature will affect the phosphorus in the determination process. The measurement results are greatly affected, the analysis conditions are difficult to control and the analysis process will be interfered by iron, tungsten, arsenic, chromium, silicon, etc.

Images