A detection method of vegetable oils in edible blended oil based on three-dimensional fluorescence spectroscopy technique

•Fluorescence spectra were used to examine the contents of oil blends.•A new quantify method for vegetable oils using Quasi Monte Carlo integral.•The method is more accurate and reduces random errors compared to previous examples.•The method can support balanced nutrition and help regulate the blended oil market.

Edible blended vegetable oils are made from two or more refined oils. Blended oils can provide a wider range of essential fatty acids than single vegetable oils, which helps support good nutrition. Nutritional components in blended oils are related to the type and content of vegetable oils used, and a new, more accurate, method is proposed to identify and quantify the vegetable oils present using cluster analysis and a Quasi-Monte Carlo integral. Three-dimensional fluorescence spectra were obtained at 250–400 nm (excitation) and 260–750 nm (emission). Mixtures of sunflower, soybean and peanut oils were used as typical examples to validate the effectiveness of the method.