Preparation of turmeric powder with various extraction and drying methods

Chemical and Biological Technologies in Agriculture

Table 2 Antioxidant activities in turmeric powder according to the various extract and drying methods

Sample type	DPPH radical scavenging activity	ABTS radical scavenging activity
Control	8 \(\pm\) 1^a	14.8 \(\pm\) 0.8^a
Spray drying
Water	8.5 \(\pm\) 0.9^a	27.9 \(\pm\) 0.8^b
50% ethanol	17.7 \(\pm\) 0.9^b	62 \(\pm\) 2^c
Freeze drying
Water	8 \(\pm\) 1^a	29.6 \(\pm\) 0.7^b
50% ethanol	17 \(\pm\) 1^b	62 \(\pm\) 3^c
70% ethanol	23 \(\pm\) 1^c	67 \(\pm\) 3^d
Spray-freeze drying
Water	9 \(\pm\) 1^a	26.0 \(\pm\) 0.9^b
50% ethanol	16 \(\pm\) 1^b	59 \(\pm\) 2^c
70% ethanol	25 \(\pm\) 2^c	68 \(\pm\) 4^d
Ascorbic acid	40 \(\pm\) 2^d	98 \(\pm\) 4^e

1) All values are represented as mean \(\pm\) standard deviation (S.D.) (n = 3)
2) Different superscript letters in the same column denote significant differences (Duncan’s range test, p < 0.05)