Table 1. Results of recovery and precision of TA.

Concentration (mg/ml)	Recovery χ± RSD%	Intraday χ ± RSD%	Interday χ ± RSD%
0.01	0.0097±0.0003	0.0090±0.0002	0.0094±0.0003
0.06	0.0591±0.0017	0.0605±0.0030	0.0582±0.0021
0.1	0.0997±0.0019	0.0997±0.0012	0.0962±0.0035

χ: mean values, n=5; RSD: relative standard deviation.