. 2012 Mar 12;17(3):3082–3092. doi: 10.3390/molecules17033082

Table 3.

Antioxidant activity of essential oils of H. gardnerianum collected at different locations.

Essential oils/standards	DPPH scavenging activity
Essential oils/standards	EC₅₀ (µg/mL)
FU	8.46 ^a ± 0.90
FO	28.76 ^c ± 2.60
AC	31.14 ^c ± 2.70
SC	15.16 ^b ± 1.50
Quercetin	3.11 ± 0.06
Trolox	5.63 ± 0.09
Ascorbic acid	10.34 ± 0.28
BHT	31.00 ± 0.19

Place of sampling: FU = Furnas; FO = Fogo; SC = Sete Cidades; AC = Achada do Nordeste. Values are means ± standard deviations. Means marked by the same letter indicate no significant differences between essential oils P = 0.05 (LSD test).