基于傅里叶红外光谱重组技术的食用油检测改进研究

以食用油、无色矿物精油(OMS)、六羰基铬为试验材料,利用二维相关振动光谱技术对FTIR光谱重组(SR)检测中OMS特征吸收峰取代光谱标记物进行评价研究。结果表明在单一菜籽油体系中,有9个相关吸收峰可用于TVF预测定量分析。考虑不同因素影响,相关吸收峰减至4个。最优相关吸收峰测定OMS体积分数相关性好于标记物特征吸收峰,受混合样品极性变化影响较少。在食用油和OMS混合物中既可用光谱标记物也可用OMS溶剂本身相关吸收峰来扣除混合样品光谱中OMS部分。

of FTIR Spectral Reconstitution Technique in Edible Oils Analysis

Edible oils,odorless mineral spirits(OMS),chromium hexacarbonyl(spectral marker) taken as raw materials,by using spectral reconstitution(SR-FTIR),the marker's ability to predict the true volume fraction(TVF) of OMS was evaluated and 2-D correlation spectroscopy was employed as a means to determine whether solvent bands could substitute for the marker.The results indicated 9 spectral wavelengths can be used to quantify the TVF in a single system of rapeseed oil.However, with the introduction of additional va...