Green Atomic Absorption Spectroscopic Methods for the Determination of Rabeprazole Sodium and Fluvastatin Sodium in Pure and Pharmaceutical Dosage Forms

Aims: Novel green analytical methods have been proposed for the assay of Rabeprazole sodium and Fluvastatin sodium in their pure and formulated dosage forms.

Study Design: The methods determine each drug through the estimation of its sodium content, using Flame Atomic Absorption Spectroscopy at wavelength 589 nm.

Place and Duration of Study: Central laboratory at Faculty of Pharmacy, Damanhour University. Time duration January-March, 2020.

Methodology: Methods are developed and optimized for maximum sensitivity, selectivity and degree of greenness. Linearity is achieved in the range of 8.29- 66.33 ppm of Rabeprazole sodium (equivalent to 0.5- 4 ppm Na) and 14.13- 141.32 ppm of Fluvastatin sodium (equivalent to 0.75 -7.5 ppm Na). The proposed assays are fully validated regarding ICH guidelines.

Results: Atomic spectroscopic assays are compared to reported spectrophotometric ones for each drug separately using Student t-test and F-variance ratio.

Conclusion: Satisfactory values indicate good agreement and the insignificant difference between both methods. The obtained percentages of recovery (99-101%) indicate no interference from excipients in formulation matrices.