A Green and Efficient Method for the Preconcentration and Determination of Gallic Acid, Bergenin, Quercitrin, and Embelin from Ardisia japonica Using Nononic Surfactant Genapol X-080 as the Extraction Solvent

Table 2

Precision and accuracy of the method .

Analytes	Assay	Concentration; (µg mL^−1)	Accuracy (%)	Precision; (RSD%)
Gallic acid	Intra-assay	0.4	96.5	4.96
		2	97.9	0.79
		10	98.6	0.13
	Inter-assay	0.4	97.1	3.65
		2	97.7	0.93
		10	97.4	0.11
Bergenin	Intra-assay	4	97.7	0.47
		20	98.7	0.03
		100	98.7	0.03
	Inter-assay	4	97.6	0.44
		20	98.4	0.01
		100	97.0	0.02
Quercitrin	Intra-assay	0.4	98.6	4.10
		2	95.9	1.19
		10	100.0	0.25
		0.4	98.4	4.23
	Inter-assay	2	98.5	1.30
		10	97.8	0.17
Embelin	Intra-assay	1	98.2	2.53
		10	97.8	0.21
		50	97.9	0.03
		1	98.4	0.46
	Inter-assay	10	96.8	0.12
		50	97.3	0.03