Optimization of Extraction and Enrichment of Steroidal Alkaloids from Bulbs of Cultivated Fritillaria cirrhosa

Table 7

Langmuir and Freundlich adsorption isotherm parameters of total alkaloids, imperialine and peimisine on H-103 resin at different temperatures.

Compound	Temperature (°C)	Langmuir equation	𝑄0 (mg/g)	𝐾	𝑅^2	Freundlich equation	𝑘𝑓	1/𝑛	𝑅^2
Total alkaloids	20	𝐶𝑒/𝑄𝑒=0.00841𝐶𝑒+0.00065	114.340	13.923	0.952	ln𝑄𝑒=6.062+0.764×ln𝐶𝑒	429.196	0.764	0.944
	30	𝐶𝑒/𝑄𝑒=0.00823𝐶𝑒+0.00047	121.557	17.385	0.954	ln𝑄𝑒=6.010+0.670×ln𝐶𝑒	407.666	0.670	0.993
	40	𝐶𝑒/𝑄𝑒=0.01246𝐶𝑒+0.00011	80.267	111.555	0.990	ln𝑄𝑒=5.324+0.378×ln𝐶𝑒	205.232	0.378	0.953
Imperialine	20	𝐶𝑒/𝑄𝑒=0.02505𝐶𝑒+0.00063	39.912	39.317	0.939	ln𝑄𝑒=5.756+0.742×ln𝐶𝑒	315.965	0.742	0.978
	30	𝐶𝑒/𝑄𝑒=0.02178𝐶𝑒+0.00051	45.901	38.903	0.976	ln𝑄𝑒=6.048+0.762×ln𝐶𝑒	423.471	0.762	0.989
	40	𝐶𝑒/𝑄𝑒=0.03637𝐶𝑒+0.00011	27.493	325.897	0.992	ln𝑄𝑒=4.710+0.388×ln𝐶𝑒	111.089	0.388	0.946
Peimisine	20	𝐶𝑒/𝑄𝑒=0.07734𝐶𝑒+0.00014	12.930	121.359	0.976	ln𝑄𝑒=5.537+0.756×ln𝐶𝑒	253.900	0.756	0.984
	30	𝐶𝑒/𝑄𝑒=0.07734𝐶𝑒+0.00014	16.454	108.524	0.926	ln𝑄𝑒=5.968+0.799×ln𝐶𝑒	390.781	0.799	0.986
	40	𝐶𝑒/𝑄𝑒=0.11229𝐶𝑒+0.00011	8.905	1006.130	0.992	ln𝑄𝑒=4.080+0.399×ln𝐶𝑒	59.119	0.399	0.955