Table 2 Total carotenoids and antioxidant activity of extract obtained from carrot rejects in study 1.

From: Green extraction of bioactive components from carrot industry waste and evaluation of spent residue as an energy source

Solvent/solvent mixture

Maximum wavelength for carotenoid determination (nm)

Total Carotenoid content (mg/100 g DW)

ABTS assay (mM Trolox/100 g DW)

FRAP assay (mM Trolox/100 g DW)

DPPH (mM Trolox/100 g DW)

Ethanol

452

98.34 ± 4.04a

745 ± 17.38d

596.21 ± 97.44a

135.43 ± 21.73f

Ethyl acetate

454

154.95 ± 0.94d

639.44 ± 25.46b

648.89 ± 77.14c

153.21 ± 18.30g

Acetone

454

149.09 ± 4.04b

617.22 ± 41.94a

619.26 ± 19.75b

110.38 ± 12.20e

Hexane

450

151.59 ± 2.66c

991.11 ± 20.46g

2011.85 ± 98.76g

47.35 ± 28.31a

Hexane/acetone (1:1)

454

162.69 ± 3.52e

811.67 ± 15.18f

1794.57 ± 77.14d

93.41 ± 12.44d

Hexane/ethanol (1:1)

452

172.88 ± 3.07h

996 ± 26.38h

2234.48 ± 99.42h

58.66 ± 11.11b

Hexane/ethyl acetate (1:1)

454

168.52 ± 2.89f

650.55 ± 41.75c

1882.22 ± 29.63e

77.25 ± 25.69c

Hexane/acetone/ethanol (2:1:1)

450

170.05 ± 1.66g

789.44 ± 25.09e

1935.31 ± 52.26f

110.38 ± 22.91e

  1. Values are presented as mean ± SD of three replicates.
  2. Different letters in the same column indicate a statistically significant difference at (p < 0.05).