Chemistry-PTM-OMA_Modules_1-4

Sources of Reference Materials and  Reference Standards • National Institute of Standards and Technology (NIST) https://www.nist.gov/srm • Environmental Protection Agency (EPA)  https://cfpub.epa.gov/si/si_public_record_Report.cfm?Lab=ORD&dirEntryId=38019 • Canadian National Research Council (NRC) https://nrc.canada.ca/en/certifications‐ evaluations‐standards/certified‐reference‐materials/certified‐reference‐materials • US Pharmacopeia (USP) http://www.usp.org/reference‐standards/reference‐standards‐ catalog • Institute of Reference Materials and Measurements (IRMM)  https://ec.europa.eu/jrc/en/science‐update/welcome‐irmm‐reference‐materials‐ catalogue • Chemical Suppliers