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首页> 外文期刊>Food analytical methods >Potential use of FTIR-ATR spectroscopic method for determination of virgin coconut oil and extra virgin olive oil in ternary mixture systems.
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Potential use of FTIR-ATR spectroscopic method for determination of virgin coconut oil and extra virgin olive oil in ternary mixture systems.

机译:FTIR-ATR光谱法可用于确定三元混合系统中的初榨椰子油和特级初榨橄榄油。

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摘要

The aim of this study was to investigate the feasibility of Fourier-transform infrared (FTIR) spectroscopy combined with multivariate calibrations of partial least square (PLS) and principle component regression (PCR) for analysis of virgin coconut oil (VCO) in the ternary mixture with palm oil (PO) and olive oil, and for analysis of extra virgin olive oil (EVOO) mixed with soybean oil (SO) and corn oil (CO). The spectra of individual oils and their blends with certain concentrations were scanned using horizontal attenuated total reflectance accessory at mid-infrared region of 4,000-650 cm-1. The optimal frequency regions selected for calibration models were based on its ability to give the highest values of coefficient of determination (R2) and the lowest values of root mean standard error of calibration (RMSEC). PLS was slightly better for quantitative analysis of VCO and EVOO compared with PCR. VCO in ternary mixtures is successfully determined at frequency region of 1,200-1,000 using second derivative FTIR spectra with R2 and RMSEC values of 0.999 and 0.200, respectively. Meanwhile, EVOO is best determined at 1,200-1,000 using first derivative FTIR spectra with R2 and RMSEC values of 0.999 and 0.975, respectively. The results showed that FTIR spectroscopy offers accurate and reliable technique for quantitative analysis of VCO and EVOO in ternary systems. In addition, the developed method can be used for the monitoring of VCO and EVOO adulteration with cheaper oils like PO in VCO as well as SO and CO in EVOO.
机译:这项研究的目的是调查傅里叶变换红外(FTIR)光谱结合偏最小二乘(PLS)和主成分回归(PCR)多元变量分析三元混合物中原始椰子油(VCO)的可行性用于棕榈油(PO)和橄榄油,以及用于分析与大豆油(SO)和玉米油(CO)混合的特级初榨橄榄油(EVOO)。使用水平衰减的全反射附件在4,000-650 cm -1 的中红外区域扫描特定浓度的各种油及其混合物的光谱。选择校准模型的最佳频率区域是基于其给出最高确定系数( R 2 )和最低均方根标准误差的能力。校准(RMSEC)。与PCR相比,PLS对VCO和EVOO的定量分析略好。使用二阶导数FTIR光谱在 R 2 和RMSEC值分别为0.999和0.200的情况下,成功地确定了三元混合物中的VCO。同时,最好使用一阶导数FTIR光谱将EVOO确定在1,200-1,000,其中 R 2 和RMSEC值分别为0.999和0.975。结果表明,FTIR光谱学为三元系统中VCO和EVOO的定量分析提供了准确可靠的技术。此外,开发的方法还可用于监视VCO和EVOO掺假,包括使用VCO中的PO以及EVOO中的SO和CO等廉价油。

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