Abstract
This research delves into a systematic Analytical Quality by Design (AQbD) approach to develop and validate a stability-indicating robust RP-HPLC method for the simultaneous determination of Rutin and Curcumin, compounds known for their anti-inflammatory, antioxidant, and wound-healing properties. Utilizing QbD principles, critical method parameters (CMPs) were identified and screened using design of experiments (DoE) and optimized via response surface methodology (RSM) with Central Composite Design (CCD). The optimized chromatographic separation used a Phenomenex Luna C18 column with gradient elution, using methanol and 0.1% formic acid, a flow rate of 1 ml/min, and detection at 345 nm (isosbestic point). The retention times were 5.63 mins for Rutin and 17.01 mins for Curcumin. The stability indication of the developed HPLC method was performed, and validation parameters were meticulously conducted following the ICH Q2(R1) guidelines, demonstrating linearity over 2-10 μg/ml for Rutin and 5-25 μg/ml for Curcumin, with correlation coefficients of 0.9999 and 0.9998, respectively. Precision studies showed %RSD within acceptable limits, and accuracies ranged between 97-100%. This validated HPLC method offers a reliable, sensitive approach for simultaneous quantifying Rutin and Curcumin, suitable for routine analysis in pharmaceutical laboratories and quality control.
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