April 5th 2025
The authors examine the risks of extractables and leachables, and present solutions that emphasize the importance of a strategic, multi-prong approach.
There is a great need for sensitive, precise, and easily accessible analytical detection techniques for protein sequencing.
Analytical Method Comparability in Registration and Post-Approval Stages: A Risk-Based Approach
A risk-based approach is recommended for analytical method comparability for HPLC assay and impurities methods.
Using the Guard Band to Determine a Risk-Based Specification
October 2nd 2014A risk-based guard band surrounds a specification limit and is derived from the uncertainty of the reportable value of the analytical procedure, which includes the uncertainty in the reference standard. The author discusses requirements for generating a reportable value and calculating the associated measurement uncertainty.
Investigation of Various Impurities in Febuxostat
Febuxostat is a novel, non-purine, selective inhibitor of xanthine oxidase for hyperuricemia in patients with gout. It is the first promising substitute for allopurinol in 40 years. Various synthetic routes to febuxostat, as well as polymorphic forms and impurities of the drug, are reported in the literature. The authors have also identified several impurities that result from the synthesis of febuxostat. This article describes the identification and control of all isomeric, carryover, and byproduct impurities of febuxostat and its intermediates.
Using Quality by Design to Develop Robust Chromatographic Methods
The quality-by-design principles used to control process variability are equally important to measurement systems because process variability includes contributions from measurement system variability. The authors use real-life examples from drug development projects to outline how an understanding of chromatographic measurement system variability might be achieved.
Complying with Revised Weighing Guidelines
August 2nd 2014The latest revisions to the USP General Chapters <41> Balances and <1251> Weighing on an Analytical Balance aim to ensure weighing accuracy and eliminate unnecessary overtesting by simplifying previous descriptions and reflecting current state-of-the-art weighing practices.