The LOD
and LOQ ranged from 0.06 to 0.91 μg/mL and 0.20 to 2.84 μg/mL, respectively.
The relative standard deviation (RSD) values obtained for
the precision, repeatability and stability tests were all less than 2.5%,
as given in Table 2, which showed that the system was reliable for
chemical analysis of tea samples. The recovery method percentage
ranged from 95.3% to 97.3%, with RSD less than 2.2% as shown in
Table 2. Considering the results, the method was accurate enough.