S.No

Parameter

Variation

% RSD
for Assay

Sumatriptan succinate

Naproxen sodium

1

Repeatability(inter-day)

(a)  Analyst-1

(b) Waters Acquity UPLC system with PDA detector.
(c)  Day-1

0.7

0.4

2

Intermediate precision
(intra-day)

(a)  Analyst-2

(b) Waters Acquity UPLC system with tunable UV detector.
(c)  Day-2

0.6

0.4