可能是需要的,起码专属性是需要确认的。具体参考USP1226.
Drug substances from different suppliers may have different impurity profiles that are not addressed by the compendial test procedure. Similarly, the excipients in a drug product can vary widely among manufacturers and may have the potential to directly interfere with the procedure or cause the formation of impurities that are no addressed by the compendial procedure.......