Repeatability and intermediate precision of the developed
method was expressed in terms of relative standard deviation
(RSD) of the absorbance. The results showed that the
repeatability, intra- and inter-day variation of the results at
concentration of 20 μg/mL for ATL and 10 μg/mL for ATV were within the acceptable range. The coefficients of
variation for both the inter-day and intra-day precision of the
method was found was found to be less than 1% for both
drugs (Table 1).