茶树精油-海藻酸钠复合涂膜对鲜切苹果品质的影响

Effect of Tea Tree Essential Oil and Sodium Alginate Composite Coating on the Quality of Fresh-Cut Apple

以山东富士苹果为试材,通过测定鲜切苹果经不同浓度茶树精油(0.1%、0.3%、0.5%(V/V))和1.5%(m/V)海藻酸钠复合涂膜处理后,在4℃贮藏过程中失重率、硬度、可溶性固形物含量、色差、VC含量、总酚含量及抗氧化活性的变化,研究茶树精油-海藻酸钠复合涂膜对鲜切苹果品质的影响。结果表明:适宜浓度的茶树精油复合海藻酸钠涂膜处理可以有效保持鲜切苹果的鲜度和硬度,减少失重率的增加和可溶性固形物含量的降低,抑制褐变,同时减缓VC含量、总酚含量和DPPH自由基清除能力的下降速度。其中,1.5%海藻酸钠和0.1%茶树精油复配涂膜处理鲜切苹果的效果最佳。该研究结果可为茶树精油复合海藻酸钠涂膜在鲜切水果保鲜上的深入研究和应用提供参考。

The influence of sodium alginate and tea tree essential oil composite coating on the quality of fresh-cut Fuji apple from Shandong was studied.The changes of the weight loss rate,hardness,soluble solid content,color difference,ascorbic acid content,total phenol content and antioxidant activity of apples were measured during storage at 4℃ after compositely coated with different concentration of tea tree essential oil(0.1%,0.3% and 0.5%(V/V))and 1.5%(m/V)sodium alginate.The results indicated that appropriate concentration of tea tree essential oil and sodium alginate composite coating could effectively maintain freshness and hardness of fresh-cut apples,reduce the increase of weight loss rate and the decline of total soluble solid contents,inhibit browning and slow down the decline in vitamin C,total phenolics contents and DPPH·scavenging activity.The fresh-cut apples treated by 1.5% sodium alginate and 0.1%tea tree oil composite coating had the best storage quality among all treatments.The results can provide reference for the further research and application of tea tree essential oil and sodium alginate composite coating on fresh-keeping of fresh-cut fruits.