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.