Simultaneous Determination of Four Ingredients in Plantago Depressa by Single Marker

Table 8

Influence of different column temperatures on relative correction factors.

Column temperatures (°C)	Relative correction factor
	Protocatechuic acid	Catechin	Luteolin
20	1.1965	0.8603	1.5971
25	1.2022	0.8647	1.6025
30	1.2241	0.8755	1.6258
35	1.1963	0.8599	1.5998
40	1.2138	0.8671	1.6123
Mean	1.2075	0.8667	1.6094
RSD/%	1.21	0.92	0.89