关键词: 辉光放电等离子体, 葡萄汁, 棒曲霉素, 安全品质

Abstract: In order to improve the security quality of grape juice, the grape juice containing patulin (PAT) was treated with a glow discharge plasma (GDP) reactor, and the optimal process conditions were determined by single factor experiment and orthogonal experiment: The voltage was 560 V, the treatment time was 3 min, the concentration of PAT was 3 mg/L, and 100 mg/L H2O2 was used as the catalyst. Under these conditions, the degradation rate of PAT in grape juice by GDP was as high as 98.9%. The results of degradation kinetics indicated that the degradation of PAT in grape juice by GDP conformed to the first-order kinetics. In addition, the physicochemical indexes of grape juice were evaluated after GDP treatment. The results showed that the reducing sugar, total soluble solid (TSS), total acid, pH, total phenols and total flavonoids of grape juice treated with GDP did not change significantly, and the clarity of grape juice was improved to a certain extent. Results of the research provided a theoretical basis for the application of glow discharge plasma to the degradation of patulin in grape juice.

Key words: glow discharge plasma, grape juice, patulin, security quality