Effect of glow discharge plasma on the degradation of patulin in apple juice and its quality

In order to seek an efficient method for degradation of patulin in apple juice with the quality of apple juice maintained as well as possible,the effect of glow discharge plasma treatment on the degradation of patulin in apple juice and its impact on the juice quality were studied. The results showed that the patulin could be effectively degraded by glow discharge plasma at 550 V of the DC voltage and 145 m A to 155 m A of the current range,and the degradation rate of patulin was 96.63% at 5 min of the treatment time. Within 0 to 30 min of the treatment time,the soluble solid concentration had no change. But the color value and clarity of apple juice increased. Within 0 to 10 min of the treatment time,the total acid content increased slightly and p H value decreased unconspicuously. The treatment for 10 min had no remarkable effect on the viscosity,conductivity,A660 and A420of apple juice. Based on a comprehensive consideration,patulin would be decreased to a lower level after treatment by glow discharge plasma for 10 min,and the main chemical and physical indexes of export apple juice could not be affected as well.