Universal ion chromatography method for anions in active pharmaceutical ingredients enabled by computer-assisted...

Area of Science:

• Analytical Chemistry
• Pharmaceutical Analysis

Background:

• Ion Chromatography (IC) is a primary technique for analyzing ionic species in pharmaceuticals.
• Developing a single, universal IC method for diverse analytes significantly reduces method development and validation time.

Purpose of the Study:

• To develop a universal Ion Chromatography (IC) method for the analysis of anions in active pharmaceutical ingredients (APIs).
• To utilize computer-assisted chromatography modeling for efficient method development and prediction of analyte behavior.

Main Methods:

• Screened three IC columns (Dionex IonPac AS28-Fast, AS19, AS11-HC) to identify the optimal stationary phase.
• Developed and optimized a universal IC method using an AS11-HC 4 µm column, achieving separation of 31 anions in 36 minutes.
• Employed LC Simulator for method optimization and established a predictive model for anion retention behavior (R² = 0.999).

Main Results:

• A universal IC method was successfully developed, capable of separating 31 common anions within 36 minutes.
• A predictive model demonstrated high accuracy, with experimental and predicted retention times showing excellent correlation (R² = 0.999).
• The method was validated for 29 anions using various diluents, confirming its applicability to commercial APIs.

Conclusions:

• The developed universal IC method offers an efficient and simplified approach for the separation and analysis of common anions in APIs.
• The integration of LC simulator modeling provides a robust framework for accelerating method development for a wide range of ionic analytes.