硫铁矿石标准物质研制中有关问题的探讨

探讨了硫铁矿石的稳定性和影响其稳定的诸因素。定量考察了硫铁矿石在存放过程中,由于空气中氧和水份的作用使低价硫逐渐被氧化为高价硫的过程。提出可用全硫(TS)作为硫铁矿石稳定性的监测项目。另外,对硫铁矿石标准物质研制中的样品采集、制备、均匀性,定值项目等问题也进行了讨论。

Some Problems in the Preparation of Pyrite Ore Standard Reference Materials

An investigation was made of the stability of pyrite ores and the affecting factors.It was found that the low-valent sulfur is gradually oxidized to high-valent sulfur by oxygen and water when exposed to air, which is the main reason for the unstability. Total sulfur content is suggested as the monitoring item for the change of the material. Some other problems in the preparation of pyrite ore standard reference materials, such as sample collection and homogeneity test were also discussed.