微量分析法用于火焰原子吸收光谱测定高含量钠

Microanalysis for Flame Atomic Absorption Spectroscopyin Determination of High Content Sodium

将微量分析方法与火焰原子吸收法结合用于测定高钠样品中的钠含量.通过选择合适的钠吸收谱线,确定了标准曲线和测定参数,建立了适合测定高钠样品的方法.方法的线性工作范围为0～5 mg/L,方法检出限为0.02 mg/L,RSD为0.5%.运用方法测试含钠有机物和无机钠盐中不同浓度的钠含量,结果表明,实际样品中钠含量的测定值与计算值间的绝对误差小于0.3%,相对误差小于1%,回收率99.2%～100.6%.

A new method using Flame Atomic Absorption Spectroscopy （FAAS） and Microanalysis to determine high content sodium is developed. The developed method involves the choosing of suitable absorption line of sodium, the optimization of testing parameters and the evaluation of the linearity of the method. The linearity is 0 - 5 mg/L, the detection limit is 0.02 mg/L and the repeatability is 0. 5% RSD. By comparing the measured sodium content with its truth value in some known organic and inorganic compounds, the absolute error is less than 0.3%, the relative error is less than 1%, and the recovery is 99.2% - 100.6%.