Table 3. Result of repeatability

Amount of sample (mg)	Measured content of GPH1) (mg/g)	RSD2) (%)
40	13.60±0.12	0.90
50	13.70±0.08	0.56
60	13.44±0.09	0.67

Each value was expressed as mean±SD of quintuplicate measurements (n=5).
Relative standard deviation.