Evaluation of Two Parts of Lithocarpus polystachyus Rehd. from Different Chinese Areas by Multicomponent Content Determination and Pattern Recognition

Table 4

Linear relationship, LOQ, and LOD.

Compound	Regression equation	r	Linear range (μg·mL^−1)	LOQ (μg·mL^−1)	LOD (μg·mL^−1)
Catechin	Y = 36.41X − 0.0462	0.9994	1.20–300.00	0.34	0.12
Isoquercetin	Y = 282.44X − 0.5162	0.9993	1.46–36.50	0.15	0.05
Astragalin	Y = 255.80X − 0.2825	0.9992	1.04–260.00	0.10	0.04
Phloridzin	Y = 115.84X − 0.3612	0.9995	4.50–1120.00	0.16	0.06
Trilobatin	Y = 177.93X + 0.2167	0.9999	8.90–2225.00	0.16	0.05
Phloretin	Y = 188.99X − 0.1707	0.9994	1.06–265.00	0.11	0.05