Genogrinder Spex Certiprep
Genogrinder Spex Certiprep. SPEX CertiPrep Certified Reference Materials Inorganic . 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