A Review of Analytical Method Validation: Current Regulatory Guidelines and Practical Challenges

Validation of analytical methods is an essential procedure in fields including environmental monitoring, biotechnology, food safety, and pharmaceuticals. Reliability, reproducibility, and adherence to legal requirements are all guaranteed. Current procedures are covered in this review, including following ICH Q2(R1), USP, and EMA guidelines. Key validation factors such as accuracy, precision, specificity, detection limits, and robustness are examined in order to determine the applicability of the method. Analytical Quality by Design (AQbD), automation, AI, and machine learning are all rising developments that are changing validation techniques. The review covers matrix effects, choices between sensitivity and specificity, and method transfers between labs. In the fields of medicines, biologics, food safety, and environmental monitoring, valuable application of proven techniques is evident. Case studies demonstrate the efficacy of chromatographic techniques and lifecycle management plans. In its conclusion, the assessment points up areas for improvement in green analytical chemistry and real-time techniques as well as gaps (such worldwide harmonization).