Determination of Ferrous Oxide in Tourmaline by Using Phenanthroline Solubilization Protection-Volumetric Method
Tourmaline is a boron containing aluminosilicate mineral.It is a sensitive tracer of diagenesis and mineralization.By testing the contents of iron oxide in tourmaline of surrounding rocks,the origin of tourmaline- bearing bderock can be identified.However,there is no systematic standard analysis method and standard substance of chemical compositions of tourmaline,and the study on ferrous oxide analysis method of tourmaline is rather rare.In this paper,by adding phthalazine to form a complex with ferrous metal in the process of ore dissolving,agood solution and protection effect can be obtained for ferrous metal.A tetrafluoroethylene crucible is added to polyphenanthroline,hydrofluoric acid and sulfuric acid,and the medium and high temperature heating plate is used to heat the ore and determine the ferrous contents in the tourmaline by the potassium dichromate capacity method.The precision of the method(RSD,n=12)is 0. 59％,and the rate of recovery is 99.3％～100.9％.Through comparison experiments among many laboratories, it is proved that the method is of high accuracy and good application effect.
国家科技期刊平台
NSTL
万方数据
维普
