Table 1 The top 10% of Australian propolis (n = 16) ordered in increasing antioxidant activity compared to Brazilian green, Brazilian red and Uruguayan poplar propolis.

From: Quality assessment and chemical diversity of Australian propolis from Apis mellifera bees

Sample

Recovered yield (%)

Total phenolic content (mg GAE/g extract)

Total flavonoid content (mg QE/g extract)

Antioxidant activity IC50 (µg/mL)

1

41 ± 1

162.6 ± 4.9

47.3 ± 0.3

7.3 ± 0.2

2

42 ± 2

158.4 ± 2.1

103.0 ± 1.0

10.0 ± 0.4

3

66 ± 1

167.0 ± 1.1

22.6 ± 0.7

10.0 ± 0.2

4

45 ± 5

180.5 ± 0.5

47.2 ± 1.4

10.2 ± 0.4

5

30 ± 0

163.4 ± 0.7

98.0 ± 3.3

10.5 ± 0.1

6

43 ± 2

163.2 ± 1.6

109.8 ± 0.7

10.6 ± 1.0

7

74 ± 2

139.5 ± 0.3

79.7 ± 1.5

10.6 ± 0.1

8

43 ± 3

150.3 ± 0.4

60.3 ± 1.9

10.6 ± 0.3

9

19 ± 4

160.7 ± 1.5

104.5 ± 1.1

10.7 ± 0.3

10

35 ± 5

164.5 ± 2.0

104.2 ± 2.4

10.9 ± 0.5

11

81 ± 4

141.2 ± 1.2

87.1 ± 1.8

12.1 ± 0.2

12

44 ± 2

161.5 ± 1.1

41.8 ± 1.1

12.3 ± 0.2

13

32 ± 2

155.1 ± 0.5

80.1 ± 3.0

12.4 ± 0.1

14

46 ± 0

170.7 ± 0.2

98.4 ± 0.9

14.2 ± 0.1

15

54 ± 2

131.1 ± 2.4

69.2 ± 0.4

14.4 ± 0.2

16

69 ± 1

139.5 ± 1.9

91.9 ± 3.2

14.4 ± 0.2

Brazilian green_1

51 ± 1

134.4 ± 2.0

57.6 ± 1.1

23.5 ± 2.7

Brazilian green_2

N.D

85.5 ± 0.7

56.8 ± 2.2

21.2 ± 0.7

Brazilian red_3

40 ± 3

82.7 ± 0.5

122.3 ± 3.8

6.8 ± 0.2

Uruguay_1

40 ± 3

114.5 ± 1.8

75.0 ± 0.8

7.7 ± 0.3

Uruguay_2

N.D

92.5 ± 0.7

74.3 ± 2.1

18.6 ± 0.5

  1. N.D not determined as samples were commercialised as a liquid extract.