Method for detecting tin element in ore

Abstract

The invention discloses a method for detecting a tin element in ore. The method comprises the following steps: (1) performing alkali melting, water immersion and acidizing treatment on ore to be detected; (2) adding an ethylene diamine tetraacetic acid (EDTA) solution into the acidified ore to be detected, adding a beryllium sulfate solution, uniformly stirring, heating to 60 to 70 DEG C, and removing the ore; (3) dropwise adding an excessive amount of ammonium hydroxide into the solution obtained in the step (2) till complete precipitation, controlling the pH of the solution at 9 to 9.5, andcooling; (4) filtering, and washing the precipitate with a mixed washing liquor of ammonium hydroxide and ammonium chloride for several times; and (5) eluting the precipitate with a hydrochloric acidsolution, fixing the volume, performing analysis and detection by adopting ICP-AES, and calculating the tin element content. According to the method, the tin element in ore is separated and enriched out by a coprecipitation method for the first time, so that major elements and other paragenetic elements are effectively separated; the interference spectrum lines are reduced on a large scale; the substrate interference is effectively eliminated; and the accuracy of the method is improved.

Description

technical field [0001] The invention relates to a chemical element determination technology, in particular to a rapid and accurate detection method for enriching the tin element in an ore and separating the salt content and most of the associated elements. Background technique [0002] Alkali fusion method is the most effective and commonly used method to decompose tin in ore, but the solution after leaching has high sodium salt and many associated elements, and the matrix interference of different minerals is different, so it is difficult to achieve matrix matching, which affects the ICP-AES test results Accuracy and stability, and the ICP nebulizer and rectangular tube are prone to salt accumulation and blockage, which will affect the service life of the instrument. Once the ICP-AES instrument detects high-salt alkali-melted samples for a long time, the nebulizer and rectangular tube will be polluted by sodium salts, and other elements cannot be accurately detected. Cont...

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Problems solved by technology

[0002] Alkali fusion method is the most effective and commonly used method to decompose tin in ore, but the solution after leaching has high sodium salt and many associated elements, and the matrix interference of different minerals is different, so it is difficult to achieve matrix matching, which affects the ICP-AES test results Accuracy and stability, and the ICP nebulizer and rectangular tube are prone to salt accumulation and blockage, which affects the service life of the instrument

Once the ICP-AES instrument detects high-salt alkali-melted samples for a long time, the nebulizer and rectangular tube will be polluted by sodium salt, and other elements cannot be accurately detected

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