摘要
运用中波近红外光谱仪(光栅分光,InGaAs检测器),采取平移、平滑、求导等光谱数据预处理方法,用偏最小二乘法进行统计分析,建立了水溶液中的硝酸浓度的近红外快速分析测定模型。其预测结果与国标方法相比相关系数R=0.9997,检出限为0.03mol/L,测定浓度范围在0.10～3.00mol/L,精密度相对标准偏差小于5%。该方法简单、快速,无需消耗任何试剂,可满足现场快速分析的需要。
The paper used near infrared spectroscopy （Grating, InGaAs detector）, with translation, smoothing, derivative and partial least-squares regression, then a determination mode of nitric acid in water was established. The prediction results compare with the international standard method, the correlation coefficient R is 0.999 7, and the minimum detectability is 0.03 mol/L, measurement range is 0.10-3.00 mol/L, RSD〈5%. The method is simple and rapid, it does not need much chemical reagents, and it can also be suitable for fast determination in worksite.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2010年第B09期69-74,共6页
Atomic Energy Science and Technology
关键词
硝酸
近红外光谱
偏最小二乘法
温度校正模型
nitric acid
near infrared spectroscopy
partial least-square
temperaturecalibration model
