D.1 General This annex describes a procedure for conducting verification checks using either a secondary working standard (SWS) or a certified reference material (CRM), and includes a procedure for producing a secondary working standard (SWS).
D.1 GeneralThis annex describes a procedure for conducting verification checks using either a secondary working standard (SWS) or a certified reference material (CRM), and includes a procedure for producing a secondary working standard (SWS).