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Presenter recommends orthogonal analytical methods and suitability standards for RLD comparison
Summary
Because single methods can miss composition differences, the presenter recommended multiple orthogonal separation techniques, diversified suitability test standards with altered R/S ratios, and quantitative comparison of distribution profiles to support RLD comparisons and future manufacturing changes.
The presenter argued that relying on a single analytical method risks missing composition differences or showing different sensitivity to the same change. He recommended "using multiple analytical methods, with orthogonal separation principles, or complementary methods," and urged optimized methods to maximize resolution and generate detailed distribution profiles for RLD comparison.
To demonstrate method suitability and sensitivity, the presenter suggested preparing diversified suitability test standards and performing quantitative analyses for each orthogonal profile, including measurements of R/S ratios after elongation steps to establish baselines. "The methods should be optimized to maximize the resolution and used to generate multiple detailed and broad distribution profile for ROD comparison," he said, noting that these profiles also serve as a baseline to support future manufacturing changes.
