Preliminary Assessment of the Chemical Stability of Dried Extracts from Guazuma ulmifolia Lam. (Sterculiaceae)

Table 1

Stability of the constituents procyanidin B2 (PB2) and epicatechin (EP) of the dried extract of Guazuma ulmifolia. Mean ± SD (RSD %).

Days of storage	CE (mg/mg)		CEA (mg/mg)
	PB2	EP	PB2	EP
Time zero	0.0236±4.5 (3.8)	0.0152±1.4 (1.9)	0.0230±2.7 (2.3)	0.0144±2.3 (3.2)
2	0.0237±6.0 (5.1)	0.0154±3.5 (4.5)	0.0238±1.2 (1.0)	0.0154±3.4 (4.4)
7	0.0226±5.2 (4.6)	0.0152±2.4 (3.2)	0.0232±5.1 (4.4)	0.0152±1.4 (1.9)
14	0.0221±10.5 (9.4)	0.0147±1.2 (1.7)	0.0228±4.8 (4.2)	0.0145±2.4 (3.4)
21	0.0220±9.9 (9.0)	0.0152±6.9 (9.1)	0.0237±7.8 (6.6)	0.0170±2.4 (2.8)