highly significantp < 0.001
1 G revealed a highly significant positive correlation ( p < 0.001) between TPC, TFC and FRAP, ABTS + free radical scavenging activity in all three onion varieties, with the correlation coefficient exceeding 0.85; in contrast, SASC and DPPH free radical scavenging activity presented a significant positive correlation ( p < 0.05) independent of the above indices.