Abstract:To delve comprehensively into the intricate correlations among extraction phases,active components,and the antioxidant properties of kernel pellicles across diverse walnut varieties,this study systematically investigated and contrasted the total phenolic content （TPC）,total flavonoid content（TFC）,along with the scavenging rates of DPPH·,ABTS+·,hydroxyl free radicals,and the reducing power within the ethanolphase,ethyl acetate-phase,cellulase-phase,n-butanol-phase,and aqueous-phase extracts derived from the kernel pellicles of five distinct walnut varieties.The findings unequivocally demonstrated that the choice of extraction phases exerted a profound influence on both the active components and antioxidant properties of walnut kernel pellicles. Regarding the extraction of active components,ethanol emerged as a solvent of superior efficacy. Among the varieties examined,the ethanol-phase extract of the ′Za 343′ walnut kernel pellicle exhibited the highest TPC and TFC,reaching 747.24 mg GAE/g and 54.31 mg RE/g,respectively.Notably,significant variations in antioxidant properties were observed among different walnut varieties. At a mass concentration of 0.20 mg/mL,the DPPH· scavenging rate of the ethanol-phase extract from the ′Xinxin 2′ walnut kernel pellicle soared to 84.83%；the hydroxyl radical scavenging rate of the ethyl acetate-phase extract from the ′Wen 185′walnut kernel pellicle was the highest,attaining 94.24%. Correlation analysis revealed a robust linkage between the active components in walnut kernel pellicles and their antioxidant capabilities. However,it is crucial to note that the relationships between various antioxidant indices and the TPC and TFC presented inconsistent trends across different walnut varieties.