Quantitative Analysis of Eight Triterpenoids and Two Sesquiterpenoids in Rhizoma Alismatis by Using UPLC-ESI/APCI-MS/MS and Its Application to Optimisation of Best Harvest Time and Crude Processing Temperature

Table 2

Regression equation, LODs, and LOQs of the 10 investigated compounds.

Compound	Regression equations	Linear range (ng·mL^−1)	r	LODs (ng·ml^−1)	LOQs (ng·ml^−1)
Alismoxide	Y = 0.0035 X + 0.0123	1.021–1021	0.9999	0.16	0.51
Alisol C	Y = 0.0430 X − 0.0007	4.928–492.8	0.9998	0.82	1.64
Alisol C 23-acetate	Y = 0.0105 X + 0.0102	5.105–5105	0.9997	0.73	2.55
Alisol A	Y = 0.0060 X + 0.0087	0.872–872.0	0.9999	0.14	0.44
Alisol A 24-acetate	Y = 0.1930 X + 0.0005	3.12–3120	0.9990	0.51	1.25
Alismol	Y = 0.0051 X + 0.0440	3.00–3000	0.9998	0.48	1.51
Alisol B	Y = 0.0038 X + 0.0216	7.728–7728	0.9985	0.62	3.86
Alisol B 23-acetate	Y = 0.0038 X + 0.0990	11.3–11300	0.9971	1.67	5.65
11-Deoxyalisol B	Y = 0.0009 X + 0.0046	3.432–3432	0.9985	0.46	1.72
11-Deoxyalisol B 23-acetate	Y = 0.0008 X − 0.0004	5.348–5348	0.9997	0.93	1.18