conditions, assay value of the test preparation solution was not
affected and it was in accordance with that of actual. System suitability
parameters were also found satisfactory; hence the analytical method
would be concluded as robust.
System suitability: A system suitability test of the
spectrophotometric system was performed before each validation run.
Six replicate reading of standard preparation were taken and %RSD of
standard reading were taken for same. Acceptance criteria for system
suitability, %RSD of standard reading not more than 2.0%, were full fill
during all validation parameter (Table 7).
Conclusion
The present analytical method was validated as per ICH Q2(R1)
guideline and it meets to specific acceptance criteria. It is concluded
that the analytical method was specific, precise, linear, accurate, robust
and having stability indicating characteristics. The present analytical
method can be used for its intended purpose
Calculation formula used
1. Calculation formula for % assay of Paracetamol
Mean Test Absorbance ilution of Standard Mean Test Weight
%Assay = ------------×------------×-----------×Potency of Standard
Mean Standard Absorbance Dilution of Sample Label Claim
2. Relative standard deviation
Standard deviation of Measurements
%RSD = -------------------------
--------------------------------×100
Mean value of Measurements
3. Recovery
Amount Found
%Recovery = ---------------------×100
Amount Added
4. Amount Found
Mean Test Absorbance
Amount Found (mg/ml) = ----------------------×Standard Concentration
Mean Standard Absorbance
5. Amount Added
Weight
Amount Added (mg/ml) = -----------
Volume
6. Limit Calculation for Stability of Analytical Solution Study:
Absorbance of Standard Initial–Absorbance of Standard (at different time)
Limit = ------------------------------------------------------------×100
Absorbance of Standard Initial