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矿物岩石中火焰光度法测定钾、钠,过去采用铂金器皿或聚四氟乙烯坩埚溶矿。铂金器皿价格昂贵;聚四氟乙烯最高工作温度为250℃,加热到410℃即开始分解,在溶矿过程中易于物理变型(龟裂,穿底)和化学分解,以及驱氟不尽,影响钾、钠测定结果。根据金属的电极电位原理和一种元素的原子在不同的激发电位激发下,产生它自己特征的不同能级光谱线的多级激发理论,设想用铜坩埚溶矿火焰光度法测定矿物岩石中的钾、钠。试验和样品分析证实了上述设想的可行性,在综合条件下溶矿时由铜坩埚进入溶液中的铜(80～100毫克)不影响钾、钠测定结果.
Determination of potassium and sodium by flame photometry in mineral rocks. In the past, platinum vessels or polytetrafluoroethylene crucibles were used for ore dissolution. Platinum containers are expensive; polytetrafluoroethylene maximum operating temperature of 250 ℃, heated to 410 ℃ began to decompose during the dissolution process is easy to physical changes (cracking, wear the bottom) and chemical decomposition, as well as flooding fluoride, the impact Potassium, sodium determination of the results. According to the principle of metal electrode potential and the excitation of atoms of one element under different excitation potentials, a multistage excitation theory of different energy levels spectral lines of its own characteristics is generated. It is envisaged that the copper crucible ore-dissolving flame photometric method for the determination of Potassium, sodium. Experimental and sample analysis confirmed the feasibility of the above assumptions. Copper (80-100 mg) entering the solution from the copper crucible during the dissolution process does not affect the K and Na determination results.