Description_x000D_ General description_x000D_ This Certified Reference Material (CRM) is produced and certified in accordance with ISO 17034 and ISO/IEC 17025. All information regarding the use of this CRM can be found on the certificate of analysis._x000D_ Specifications_x000D_ View example COA for MMW001_x000D_ Note - The link provided is an example certificate of analysis (COA) only and may not be the lot that you receive. All analytes may not be present or certified for each lot, and analyte concentrations will vary by lot._x000D_ Preparation Note_x000D_ A single concentrate for dilution to 2L_x000D_ Other Notes_x000D_ Values of analytes vary lot to lot. Some lots may not contain all analytes.