摘要
对火焰原子吸收光谱法测定长石中钾和钠的最佳仪器分析条件、主要成分硅和铝对测定的干扰及消除方法进行研究。在仪器的最佳条件下，氧化钾和氧化钠在一定浓度范围与吸光度呈线性关系。样品中MgO，CaO，Fe2O3的质量分数为1％，TiO2的质量分数为0．5％均不干扰K和Na的测定。大量Si和Al对测定有干扰，在制作工作曲线时加入与样品中Si，Al含量相近的粘土标样来消除。本法已用于钾长石和钠长石中K和Na测定，相对标准偏差等于或小于2．12％，加标回收率为96．2％～104．1％。
The optimal instrument conditions for determining potassium and sodium in feldspar by flame atomic absorption spectrometry,and the effects of silicon and aluminium as main component in feldspar on the determination and the elimination of the effects have been studied. In the selected experiment conditions,potassium oxide and sodium oxide concentrations over the range of 420 μg/mL and ≤ 10 μg/mL, respectively are linear with the absorbance. 1 % （m/m） magnesium oxide, calcium ox ide and iron trioxide do not interfere in the determination along with 0.5% （m/m）titanium oxide. Howeve, larger quantities of silicon and aluminium affect the determination. In order to overcome their effects a clay in which silicon and aluminium amounts are close to those of the feldspar is added in making calibration curve. The method is used to the determination of potassium and sodium in patassium feldspar and sodium feldspar samples, including four standard（GBW）samples, with the relative standard deviation up to 2.12% and the recoveries of addition standard from 96.2% to 104.1 %.
出处
《冶金分析》
EI
CAS
CSCD
北大核心
2007年第11期72-74,共3页
Metallurgical Analysis
关键词
火焰原子吸收光谱法
长石
氧化钾
氧化钠
flame atomic absorption spectrometry
feldspar
potassium oxide
sodium oxide
作者简介
王伟（1967-），男，工程师，从事气体和原子吸收分析与研究，Tel：0412—6726754，E-mail：wangwei-ag@yahoo．com．cn。
