Abstract: An ultraviolet absorption spectroscopic method for detecting adulteration in peanut oil was developed. Based on differences in the ultraviolet characteristic adsorption peaks between peanut oil and other edible oils, a quantitative detection model was established as follows: y＝46.72x－27.51 [y＝adulteration ratio (%, m/m); x＝absorbance]. The correlation coefficient of the model was 0.9779 and the standard deviation 3.099%. A highly linear correlation was observed between the predicted and actual adulteration ratios of an unknown sample with a correlation coefficient of 0.9841 and a standard deviation of 3.849%. The detection limit was approximately 10% and the relative error was less than 15%. The ultraviolet absorption spectroscopic method is applicable for the rapid detection of adulteration in peanut oil.

Key words: peanut oil, adulteration, ultraviolet absorption spectroscopic method, detection