The Bureau of Analysed Samples Ltd. (BAS) has been producing Certified Reference Materials for nearly eighty years. A large range of CRMs have been developed and maintained over this period, all under the auspices of an Honorary Advisory Committee and a body of approximately 150 Co-operating Analysts representing both Independent Laboratories and Manufacturers and Users of the materials concerned.

In November 1994, the Quality System of the Bureau of Analysed Samples Ltd. was formally approved and recognised by the award of a Certificate of Registration to the Quality Standard BS EN ISO 9002:1994 for the production and supply of CRMs, RMs and SUS. This certificate has now been revalidated to the new Standard BS EN ISO 9001:2008. Furthermore, BAS was accredited, in June 2006, to the International Guide, ISO Guide 34:2000 and the accreditation has since been updated to the current version, ISO Guide 34:2009.

Our website has recently undergone improvements and now includes a database of our current range of CRMs, together with the more popular OSRM materials. This is simultaneously searchable for up to six constituents.

A large and ever growing selection of downloadable certificates for BAS products can also be found on this website.