Method for decomposing the cassiterite-containing mineral suitable for tin content determination and application of method

The invention belongs to the technical field of ore component analysis. In order to solve the problem that the precision of a detection result is affected due to the fact that the salinity and the blank value of an ore sample determination solution decomposed through an existing geochemical exploration sample pretreatment method are high, the invention provides the method for decomposing the cassiterite-containing mineral suitable for tin content determination and the application of the method. The method comprises: introducing reducing gas CO under the high-temperature condition, damaging cassiterite lattices, and reducing tin in the sample into simple substance tin, and then decomposing the simple substance tin by using mixed acid. According to the method, the acid decomposition problem of the cassiterite-containing minerals is thoroughly solved, the reagent blank is greatly reduced, and the method can be suitable for sample pretreatment of tin determination by various analysis methods. 本发明属于矿石成分分析技术领域。针对现有