5. What Is Deference Between The Working Standard And Reference Standard?
Reference std is like USP,EP std , in this std we get COA including results of Potency by HPLC , NMR & XRPD data. whenever there is requirement of w.std preparation first we have get API rawmaterial from warehouse & we check assay , water content or LOD & Related substances aganist reference std . Some times we are doing analysis in duplicate & get mean value.then we decide final assay or potency value & it's validity one year
