ICP-AES Determination of 15 Kind of impurity elements in the Vanadium-aluminum alloy

Abstract

In order to solve the current lack of detection method of impurity elements in the vanadium-aluminum alloy, this paper established by inductively coupled plasma atomic emission spectrometry (ICP-AES) direct simultaneous determination of 15 kind of micro or trace impurity elements, including boron, tungsten, silicon, iron, lead, tin, arsenic, nickel, chromium, cobalt, copper, phosphorus, manganese, magnesium, molybdenum. Vanadium-aluminum alloy sample was digested as the solution with hydrochloric acid and nitric acid, and then by nebulizer spray aerosol was introduced in the plasma torch, the elements in the 8000-10000K high temperature was excited and emission of characteristic lines, by detecting the signal intensity of the characteristic lines for quantitative analysis. Method detailed study between the sample substrate the vanadium and aluminum as well as the co-existing elements disturbing effect, and through the optimal analysis spectral line and the background adjusted the position to avoid the spectrum disturbance. Selects the method which the substrate match and the synchronized background adjust unify to eliminate highly concentrated the vanadium aluminum base body to the test solution atomization, transmission, ICP balanced and the stimulation and the element determination each kind of disturbing effect factor, and optimize the operation control parameters of the spectrometer. In this law determination aerospace rank's vanadium-aluminium alloy impurity element's result indicated: detection limit 5.0 ∼ 100μg / L, the background equivalent concentration of 5-95μg / L; recovery rate of 95.3% to 110.0%; in content ≥0.010% RSD≤4.88%; between 0.001% and 0.010% content scope RSD≤8.89%. The actual sample results were the same as the Germany GfE company which is the world-class manufacturer of the vanadium-aluminium alloy, and detection elements and scope over the Gfe. Method measured the European standard samples of the vanadium-iron alloy consistent with the standard value, whose matrix composition similar to the vanadium-aluminium alloy.