How can I prove accuracy in the validation of determination of biogenic silica in sediment according to Mortlock & Froelich (1989) method?

The most of time we can get certified reference materials (CRMs)  in order to demostrate the method is accurate,  but  there isnt exists one for biogenic silica.  may be a intercalibration...

07 July 2015 1,455 4 View