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SPEX CertiPrep has been servicing the scientific community since 1954. We are a leading manufacturer of Certified Reference Materials (CRMs) and Calibration Standards for Analytical Spectroscopy and Chromatography. We offer a full range of Inorganic and Organic CRMs. We are certified by DQS to ISO 9001:2008 and are proud to be accredited by A2LA to ISO/IEC 17025:2005 and ISO Guide 34:2009. The scope of our accreditation is the most comprehensive in the industry and encompasses all our manufactured products.