. 2014 Apr 20;52(5):2690–2700. doi: 10.1007/s13197-014-1360-4

Table 1.

The effects of different solvents on total flavonoids (TF), total phenolics (TP) contents and antioxidant activity (TAA) of asparagus residues extract

Extraction solvent	TF (mg RE/g)	TP (mg GAE/g)	TAA (DPPH radical scavenging) (mmol TEAC g⁻¹)	TAA (ABTS radical scavenging) (mmol TEAC g⁻¹)
Acetone (%)
10	4.50 ± 0.48^bc	10.68 ± 0.57^b	0.040 ± 0.004^cde	0.081 ± 0.005^gh
30	5.24 ± 0.44^a	11.63 ± 0.59^a	0.050 ± 0.004^ab	0.102 ± 0.005^cde
50	4.52 ± 0.31^bc	11.84 ± 0.61^a	0.044 ± 0.002^bcd	0.096 ± 0.006^def
70	4.16 ± 0.27^bcd	7.78 ± 0.44^e	0.035 ± 0.005^efg	0.074 ± 0.004^h
90	3.85 ± 0.24^cd	5.366 ± 0.55^g	0.030 ± 0.005^g	0.058 ± 0.001ⁱ
Ethanol (%)
10	4.26 ± 0.43^bcd	10.58 ± 0.46^b	0.040 ± 0.002^cde	0.109 ± 0.004^cd
30	4.88 ± 0.34^ab	11.24 ± 0.02^ab	0.049 ± 0.004^ab	0.127 ± 0.005^b
50	5.43 ± 0.39^a	12.03 ± 0.22^a	0.056 ± 0.003^a	0.141 ± 0.003^a
70	4.36 ± 0.44^bcd	9.55 ± 0.31^c	0.044 ± 0.001^bc	0.111 ± 0.003^c
90	4.05 ± 0.52^cd	4.43 ± 0.45^h	0.031 ± 0.002^fg	0.086 ± 0.006^fgh
Methanol (%)
10	3.68 ± 0.21^d	6.16 ± 0.21^f	0.031 ± 0.001^fg	0.056 ± 0.005ⁱ
30	3.84 ± 0.20^cd	7.64 ± 0.19^e	0.038 ± 0.001^cde	0.075 ± 0.005^h
50	4.16 ± 0.06^bcd	8.56 ± 0.54^d	0.040 ± 0.001^cde	0.096 ± 0.001^def
70	4.26 ± 0.17^bcd	8.92 ± 0.31^cd	0.043 ± 0.002^bcd	0.105 ± 0.004^cd
90	4.08 ± 0.12^cd	7.17 ± 0.55^e	0.037 ± 0.002^def	0.089 ± 0.007^efg

Extractions were carried out at 70 °C for 2 h in the liquid–solid ratio of 20:1

The results were expressed as mean ± standard deviation (n = 3), the different letters indicated that difference was significant (P < 0.05), and the same letter was expressed as insignificant difference (P > 0.05)