Antioxidant Activity of a Geopropolis from Northeast Brazil: Chemical Characterization and Likely Botanical Origin

Table 1

Chemical parameters (g kg⁻¹) and DPPH radical scavenging activity (µg mL⁻¹) of a sample of geopropolis of Scaptotrigona postica from Mossoró (state of Rio Grande do Norte, northeast Brazil), compared with mean values of “jurema-preta” propolis [18] and limit values of the Technical Regulation of Propolis Identity and Quality (TRPIQ) [20].

Sample	Soluble solids	Total phenols	Total flavonoids	EC50
Geopropolis	550	111.5 ± 5.4	98.5 ± 8.6	74.1 ± 0.5
“Jurema-preta” propolis	537	140	105	65
TRPIQ	Minimum 350	Minimum 50	Minimum 5	—
Quercetin	—	—	—	7.4 ± 0.1