Table 3.

Alkaloid yield for extraction without cosolvents (only CO₂) at different pressures and temperatures (t = 60 min).

Run	Factors		Responses
	T (°C)	P (bar)	Y Ap (mg g−1) ± σRp (%)
10	40	150	0.42 ± 1
11	50	150	0.54 ± 2
12	60	150	0.48 ± 2
13	40	200	0.97 ± 3
14	50	200	0.90 ± 12
15	60	200	1.04 ± 2
16	40	250	0.75 ± 2
17	50	250	0.71 ± 1
18	60	250	1.11 ± 2

Y _Ae = yield of the alkaloid in the extract. Y_Ap = yield of the alkaloid in the plant.

Results are expressed as mean ± relative standard deviation (σ_R).