Physical and Antioxidant Properties of Superfine Powders of Golden Imperial Chrysanthemum
We have examined the physical properties and antioxidant activity of superfine powders of golden imperial Chrysanthemum prepared by eccentric vibratory grinding. The coarse powders (GSP-0, 43.33 µm) were processed for 1 h, 2 h, and 3 h by eccentric vibratory grinding to obtain the superfine powders GSP-1, GSP-2, and GSP-3, respectively. The scavenging capacity against hydroxyl radicals and superoxide radicals as well as the total antioxidant capacity were evaluated. The results showed that the particle sizes of GSP-1, GSP-2, and GSP-3 were 28.87, 27.52, and 11.58 µm, respectively. Moreover, GSP-1, GSP-2, and GSP-3 exhibited better physical properties and had higher antioxidant activity than GSP-0. Among these powders, GSP-3 was the best in terms of its physical properties and antioxidant activity. The results suggest that eccentric vibratory grinding is a great potential processing method for golden imperial Chrysanthemum in improving its application value.