Zoledronic Acid Analyzed by HPLC- AppNote
July 29, 2026
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Date: 29-July-2026 Last Updated: 29-July-2026
Retention of a Highly Polar Acid
Due to its highly polar nature, multiple phosphonic acid groups, and limited UV chromophore activity, chromatographic analysis can be challenging. Specialized mobile phase conditions are often required to achieve acceptable retention and peak shape.
This application note demonstrates a simple HPLC method suitable for routine assay analysis of Zoledronic Acid in pharmaceutical formulations.
Peaks:
1. Diluent
2. Zoledronic acid
Method Conditions
Column:
Cogent Diamond Hydride™, 4 µm, 100 Å
Catalog No.: 70000-10P
Dimensions: 4.6 x 100 mm
Mobile Phase: 95% ACN 10 mm Ammonium Formate
Catalog No.: 70000-10P
Dimensions: 4.6 x 100 mm
Mobile Phase: 95% ACN 10 mm Ammonium Formate
Flow Rate:
1.0mL / minute
Injection Volume: 1 uL
Detection: 195 nm
Diluent: 25:75 ACN:DI Water
Injection Volume: 1 uL
Detection: 195 nm
Diluent: 25:75 ACN:DI Water
Final working concentrations: Zoledronic acid 0.5 mg/mL
Using phenanthrene (t₀ = 1.2 min) to estimate void time, retention factors (k) listed below.
- Zoledronic acid : 2.88 min, k* ≈ 1.4