Uncertainty calculation

GOOD VALIDATION PRACTICE (cGVP) LABORATORY, METHOD AND ANALYTICAL VALIDATION
1

Hi every body,

PLZ, can u help, how I calculate uncertainty of the in-house method , we want to validate it and get ISO17025, the method is determination of trace metals(As, Cd,Pb) in fish meal using wet digestion (microwave) and ICP-OES instruments.

thanks, regards

plateeny