As a green alternative fuel for petrochemical diesel, biodiesel is currently mainly used by blending with petrochemical diesel, but the blended fuels with different ratios have different physical and chemical properties and price costs. At present, there is not a method for quickly and accurately detecting the blending ratio to distinguish whether it is necessary to mix with vegetable oil and the blending ratio of biodiesel when mixed with vegetable oil, to promote the use of blended biodiesel fuels. Mixtures of standard diesel (hereinafter referred to as diesel), jatropha oil and jatropha biodiesel were investigated based on UV-Vis in combination with the OLS and PLS. The blending ratios of jatropha oil and its biodiesel were analyzed in mixtures of diesel/jatropha biodiesel, diesel/jatropha oil/jatropha biodiesel. The results show that in the diesel/jatropha biodiesel mixture, the absorbance of the mixture decreases as the biodiesel concentration increased. Based on the blending ratio and absorbance, a UV-Vis-OLS model is established to analyze the blend ratio, and the error is within the range of ± 0.1. Additionally, for the diesel/jatropha oil/jatropha biodiesel mixture, a UV-Vis-PLS model based on the partial least squares method is established to analyze the concentrations of jatropha oil and its biodiesel in the diesel/jatropha oil/jatropha biodiesel blend, obtaining a calculation error in the range of ± 0.9. Thus, both models can quickly and accurately analyze the blending ratio of the fuel.

生物柴油作为石化柴油的绿色替代燃料，目前主要与石化柴油混合使用，但不同比例的混合燃料具有不同的理化性质和价格成本。目前，还没有一种方法可以快速，准确地检测出混合比，以区别是否需要与植物油混合，以及与植物油混合时生物柴油的混合比，以促进混合生物柴油燃料的使用。基于UV-Vis结合OLS和PLS，研究了标准柴油（以下简称柴油），麻风树油和麻风树生物柴油的混合物。在柴油/麻风树生物柴油，柴油/麻风树油/麻风树生物柴油的混合物中分析了麻风树油及其生物柴油的混合比。结果表明，在柴油/麻风树生物柴油混合物中，混合物的吸光度随生物柴油浓度的增加而降低。根据掺混比和吸光度，建立UV-Vis-OLS模型进行掺混比分析，误差在±0.1范围内。此外，对于柴油/麻风树油/麻风树生物柴油混合物，建立了基于偏最小二乘方法的UV-Vis-PLS模型，以分析柴油/麻风树油/麻风树生物柴油混合物中麻风树油及其生物柴油的浓度，获得±0.9范围内的计算误差。因此，两个模型都可以快速而准确地分析燃料的混合比。建立UV-Vis-OLS模型分析混合比，误差在±0.1范围内。此外，对于柴油/麻风树油/麻风树生物柴油混合物，建立了基于偏最小二乘方法的UV-Vis-PLS模型，以分析柴油/麻风树油/麻风树生物柴油混合物中麻风树油及其生物柴油的浓度，获得±0.9范围内的计算误差。因此，两个模型都可以快速而准确地分析燃料的混合比。建立UV-Vis-OLS模型分析混合比，误差在±0.1范围内。此外，对于柴油/麻风树油/麻风树生物柴油混合物，建立了基于偏最小二乘方法的UV-Vis-PLS模型，以分析柴油/麻风树油/麻风树生物柴油混合物中麻风树油及其生物柴油的浓度，获得±0.9范围内的计算误差。因此，两个模型都可以快速而准确地分析燃料的混合比。建立了基于偏最小二乘法的UV-Vis-PLS模型，以分析柴油/麻风树油/麻风树生物柴油混合物中麻风树油及其生物柴油的浓度，计算误差在±0.9范围内。因此，两个模型都可以快速而准确地分析燃料的混合比。建立了基于偏最小二乘法的UV-Vis-PLS模型，以分析柴油/麻风树油/麻风树生物柴油混合物中麻风树油及其生物柴油的浓度，计算误差在±0.9范围内。因此，两个模型都可以快速而准确地分析燃料的混合比。