Table 1.

Essential oil yields obtained in the batch steam distillations with stored Cistus ladanifer.

Storage Time (Days)	Moisture Content (%, w.m.)	Yield (%, d.b.)	Aver.	Std. dev.	Rel. std. dev.
1	32.0	0.063
2	30.9	0.082
4	30.2	0.088
7	29.8	0.068
1–7			0.075	0.012	15.5
15	29.7	0.082
20	28.8	0.055
30	30.0	0.060
15–30			0.066	0.014	21.9
100	15.8	0.050
110	15.2	0.060
120	15.2	0.047
100–120			0.052	0.0068	13.0

w.m.: wet matter; d.b.: dry basis; Aver.: average; Std. dev.: standard deviation; Rel. std. dev.: relative standard deviation.