Cerilliant Corp.
- Offers custom synthesis, product certification and reference materials, including standards for drugs and environmental pollutants. Includes online catalog, global distributors, and profile of company in Round Rock, Texas.
- http://www.cerilliant.com/

QMX Laboratories Limited
- Offers GC capillary columns, SPE cartridges, syringe filters, vials, caps and septa, inorganic and organic reference materials, including deuterium labelled isotopes, and accessories for AA, XRF, ICP-AES and MS, from Thaxted, England.
- http://www.qmxlabs.co.uk/