Evaluation of Soybean Oil Quality and Establishment of a Predictive
Model to Identify Suitable Soybean Varieties for Oil Processing
Abstract
Various characteristics of soybeans play important roles in the soybean
oil quality. In this study, soybean chemical traits and ten
characteristic parameters of soybean oil quality were evaluated for 58
varieties to determine the relationship between soybean chemical traits
and the soybean oil quality characteristics by correlation analysis.
After 7 of 58 soybean oil variety products were set as outliers by the
Box-plot method, an evaluation model for the overall soybean oil quality
was established based on ten parameters. Cluster analysis was used to
classify 51 soybean oil varieties into three quality grades based on the
oil quality evaluation model. A prediction model for the quality of the
soybean oil based on the chemical traits of soybeans was constructed by
stepwise regression. The relative errors between the actual values and
the predicted values of the validation varieties were less than 10%.
This study suggested that the total oil, daidzin, total phenolic,
stearic acid, linolenic acid and ɑ-tocopherol contents may be useful for
predicting the quality of soybean oil. Therefore, our study provides a
valuable method to evaluate the quality of soybean oil products and
important information for generating soybean varieties for soybean oil
processing.