摘要
采用红外光谱内标法对石英砂中的二氧化硅进行定量分析。以KSCN为内标物,选择谱图中2048cm^(-1)处的吸收峰为KSCN的定量峰,以1085cm^(-1)处的吸收峰为石英砂中SiO_2的定量峰,两者定量峰吸光度之比记为A(A=A_(SiO_2)/A_(KSCN)),石英砂中SiO_2与内标物的质量比为m(m=m_(SiO_2)/m_(KSCN)),以A对m作图,建立了内标校准曲线。结果表明在0.4<m<1.8范围内有较好的线性关系,在此线性范围内测定石英砂中SiO_2的含量具有较高的精密度和准确度。研究结果为快速测定石英砂中SiO_2的含量提供了一种简易可靠的方法。
Silica in quartz sand was quantitatively analyzed by infrared spectrum internal standard method. Using KSCN as internal standard, selecting the 2048cm^-1 absorption peak as quantitative peak of KSCN ,1085cm^-1 absorption peak as quantitative peak of SiO2 in quartz sand,the ratio of the two absorbances was denoted by A（A=AsiO2/AKSCN）,the mass ratio of SiOz in quartz sand and internal standard was denoted by m（m=mSiO2/mKSCN）, so the internal standard calibration curve of A versus m was established. The result showed that the calibration curve had good linear relationship in the range of 0.4〈msSiO2/mKSCN〈l. 8. When in the linear range,measurement of SiO2 content had high precision and accuracy. The results can provide a simple and reliable method for the rapid determination of the SiO2 in quartz sand.
出处
《光谱实验室》
CAS
2013年第2期709-711,共3页
Chinese Journal of Spectroscopy Laboratory
基金
国家质量技术监督总局产学研项目(2010QK006)
安徽科技学院基金项目(ZRC2011300)
安徽科技学院材料学重点学科基金(AKXK20102-2)
