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A rapid, simple, and sensitive RP-HPLC analytical method was developed for the simultaneous determination of triclabendazole and ivermectin in combination using a C18 RP column. The mobile phase was acetonitrilemethanolwateracetic acid (56 36 7.5 0.5, v/v/v/v) at a pH of 4.35 and flow rate of 1.0 mL/min. A 245 nm UV detection wavelength was used. Complete validation, including linearity, accuracy, recovery, LOD, LOQ, precision, robustness, stability, and peak purity, was performed. The calibration curve was linear over the range 50.09150.26 g/mL for triclabendazole with r = 0.9999 and 27.0181.02 g/mL for ivermectin with r = 0.9999. Calculated LOD and LOQ for triclabendazole were 0.03 and 0.08 g/mL, respectively, and for ivermectin 0.07 and 0.20 g/mL, respectively. The intraday precision obtained was 98.71 with RSD of 0.87 for triclabendazole and 100.79 with RSD 0.73 for ivermectin. The interday precision obtained was 99.51 with RSD of 0.35 for triclabendazole and 100.55 with RSD of 0.59 for ivermectin. Robustness was also studied, and there was no significant variation of the system suitability of the analytical method with small changes in experimental parameters.

journal of aoac international

Development and Validation of a New HPLC-UV Method for the Simultaneous Determination of Triclabendazole and Ivermectin B1a in a Pharmaceutical Formulation