摘要
用红外光谱内标法（K3[Fe（CN）6）]·6H2O为内标物）测定了氟硅酸钾废渣中氟硅酸钾的含量。实验表明：氟硅酸钾废渣的红外光谱中氟硅酸钾的测量峰（484．0cm-1）和K3[Fe（CN）6）]·6H2O的内标峰（2092．9cm-1）的峰高比（y=hi／hs）与两者质量比（x=mi／ms）有良好的线性关系，其线性回归方程为y=1．9875x＋0．2557，相关系数r=0．9953。据此测得氟硅酸钾废渣中氟硅酸钾的含量为57．79％，相对标准偏差为0．74％，加标回收率为97．0％—98．7％。该方法无需分离提取，简便，快速，成本低，测定结果准确，特别适合批量检测和快速检测，有应用价值。
Potassium ferricyanide was added into potassium fluosilicate samples as internal reference and the mixtures were measured by Fourier transform infrared spectrophotometry （FT-IR）. The peak of potassium fluosilicate at 484.0cm-1 was chosen as quantitative peak and the one of potassium ferricyanide at 2092.9cm-1 was chosen as inside mark quantitative peak. The ratio of two peak＇s absorbance （y=hi/hs） had good linear relationship with their mass ratio （x=mi/ms）. The linear regression equation wasy=1.9875x＋0.2557, with the correlation coefficient r = 0.9953. The contents of potassium fluosilicate in the potassium fluosilicate waste slag was 57.79%, the relatively standard deviation was 0.74%, the recoveries of the method were 97.0%-98.7%. This method does not require separation and extraction, especially for batch testing and rapid detection, there is value.
出处
《光谱实验室》
CAS
2014年第2期298-302,共5页
Chinese Journal of Spectroscopy Laboratory
关键词
红外光谱内标法
氟硅酸钾废渣
氟硅酸钾
Internal Standard Method of FTIR
Potassium Fluosilicate Waste Slag
Potassium Fluosilicate
