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Method for determining vanadium content in a tungsten matrix with added vanadium or simultaneously added chromium and vanadium
Method for determining vanadium content in a tungsten matrix with added vanadium or simultaneously added chromium and vanadium
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机译：加入钒或同时加入铬和钒的钨基体中钒含量的测定方法
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摘要
vanadium or chromium and vanadium added two days in a tungsten matrix was added at the same time to determine the vanadium content method, the test sample is subjected to drying and then filtered to be leached (water leaching) and the molten alkali by sodium peroxide, chromium and vanadium in the filtrate was first reducing agent, for example, by the acid is reduced to a low valence amine hydroxide , and then the filtrate is adjusted to a pH of 4-6M by the nitric acid, the vanadium is oxidized to a high valence from a cold state by a potassium permanganate, and a high vanadium valence is a ternary complex with a tungsten salt and ortho phosphate forming, black color of ternary complex is directly proportional to the vanadium content of vanadium content is determined by the color measurement, and Chromium interference is potassium permanganate in a cold state in an acidic condition to determine the non-chrome vanadium vanadium is characterized in that the removal by the fact that the oxidation. The method of the present invention is equivalent to the amount of vanadium is relatively suitable for determining the amount of the equivalent amount of vanadium is added in a single or a substantial amount of the vanadium and chromium, and at the same time adding a tungsten matrix, rapid, and accurate relative error is less than 5% may satisfy the requirements of the process for determining the product completely.
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