影响火焰光度法测定长石钾钠含量的因素研究

为提高火焰光度法测定长石中钾钠含量的准确度,以钾长石标准物质为参考,在使用FP6410型火焰光度计对长石中钾钠含量测定过程中,对火焰光度计的模拟量、背景酸种类以及共存离子(Fe3+)浓度3个影响因素进行研究。结果表明,火焰光度计模拟量大小对长石钾钠含量测定基本无影响;以HNO3和H2SO4作背景酸时,测定结果与标准物质含量相比,K2O分别偏高10.4%,283.3%,Na2O分别偏高108.7%、387.8%;外加铁试验表明,长石中含Fe2O33.05%时,使用FP6410型火焰光度计测得的K2O含量,偏低9.38%,而对Na2O测定基本没有影响。

Study on the influence factors on determination potassium and sodium in feldspar by flame photometery

In order to improve the flame photometry determination potassium feldspar in sodium content accuracy,with potassium feldspar standard for reference,the use of FP6410 type flame photometer on feldspar content determination of potassium sodium in the process of flame photometer the analog quantity,background acid type and interference elements Fe3+concentration three influence factors are studied.The results show that flame photometer analog quantity size on potassium sodium feldspar content determination of basic no effect;When background acid HNO3and H2SO4determination of results compared with the standard content high K2O respectively10.4%,283.3%,Na2O high respectively 108.7%,387.8%;Plus iron test show that the feldspar contains Fe2O3 3.05%,use FP6410 type flame photometer measure K2O content,low 9.38%,but to Na2O measurement basically no influence on it.