SCIENTIFIC RELEVANCE. The use of appropriately certified reference standards (RSs) is a necessary element of analytical procedure standardisation that ensures comparability of results across different laboratories assessing the quality of medicines. which is important for the quality control of biologicals. Marketing authorisation involves providing information on RSs. https://www.bekindtopets.com/quick-find-ICON-39290-Adjustable-Track-Bar-Kit-1999-2004-F250-F350-flash-buy/