Chemistry-PTM-OMA_Modules_1-4

Overview • Standard Reference Material (SRM) – A CRM issued by NIST that also  meets additional NIST‐specific certification criteria and is issued with  a certificate of analysis that reports the results of its characterizations  and provides information regarding the appropriate use(s) of the  material. Uses include method development, calibration, or ensuring  the integrity of measurement quality assurance programs. • Reference Standard – A traceable standard preparation of analyte  with documented identity and purity. • Reference Method – A pre‐existing official regulatory or other  recognized analytical method against which the candidate method  will be compared.