Robustness testing in liquid chromatography and capillary electrophoresis

Area of Science:

• Analytical Chemistry
• Method Validation

Background:

• Robustness testing is vital for ensuring the reliability and reproducibility of analytical methods.
• Multivariate approaches are increasingly used in chromatography and electrophoresis.

Purpose of the Study:

• To define robustness testing and its objectives.
• To describe a multivariate methodology for robustness testing in liquid chromatography and capillary electrophoresis.
• To provide guidelines for using screening and response surface designs in robustness testing.

Main Methods:

• Application of multivariate approaches in liquid chromatography and capillary electrophoresis.
• Utilizing screening designs to identify critical method parameters.
• Employing response surface designs for comprehensive method characterization.

Main Results:

• Screening designs can effectively establish method limits.
• Response surface designs provide a thorough understanding of method behavior and limitations.
• Response surface designs are particularly valuable for method transfer processes.

Conclusions:

• Robustness testing methodologies, particularly those employing multivariate approaches and response surface designs, are essential for analytical method validation.
• Response surface designs offer superior insights for method transfer compared to screening designs alone.