An eco-friendly HPLC-UV method for the determination of risedronate in its bulk and tablet dosage form with application to content uniformity, dissolution and stability testing

Saudi Pharm J. 2020 Nov;28(11):1301-1308. doi: 10.1016/j.jsps.2020.08.020. Epub 2020 Sep 2.

Abstract

Risedronate is a nitrogen-containing bisphosphonate for the treatment and prevention of postmenopausal osteoporosis. The current work aims to develop a novel green HPLC-UV method for the rapid analysis of risedronate sodium in bulk and tablet formulation. The analyzed samples were separated on Waters Atlantis dC18 (150 mm × 3.9 mm; 5 μm) column using a green mobile phase consisting of potassium phosphate buffer pH 2.9 and potassium edetate buffer pH 9.5 in a ratio of 1:2, the final pH was adjusted to 6.8 with phosphoric acid, the mobile phase was pumped at a rate of 1.0 mL/min, with column temperature set at 30 °C, eluted samples were detected at 263 nm and the chromatographic run time was 3.0 min. The method was found to be linear over the concentration range of 14-140 μg/mL with a correlation coefficient (r2) of 0.9994. Accuracy and precision were evaluated from three QC samples (LQC, MQC and HQC) together with the five calibrators where the percentage accuracy was found to be 101.84%. Processed quality control samples of risedronate sodium were tested for stability at different conditions, short term, long term and freeze- thaw stability. The current method was further extended to study the content uniformity of Actonel® tablets following United States Pharmacopoeia (USP) guidelines. The proposed method was fully validated as per ICH guidelines.

Keywords: % CV, The coefficient of variation; AV, Acceptance value; Actonel® tablets; Content uniformity; DAD, Diode Array Detector; Dissolution testing; HPLC-UV method; HPLC-UV, High-pressure liquid chromatography-ultra violet detection; HQC, High quality control; LQC, Low quality control; MQC, Medium quality control; N, Number of theoretical plates; NaOH, Sodium hydroxide; RSD, Relative standard deviation; RT, Room temperature; Risedronate; Rt, Retention time; SD, Standard deviation; SST, System suitability study; Tf, USP tailing factor; USFDA, US Food and Drug Administration; USP, United States Pharmacopoeia; Validation; k, Capacity factor; r2, Coefficient of correlation; °C, Degree Celsius; μL, Microlitre.