Basic Training 4th Annual ICP Conference

17.20 Method Validation

Following The ISO Guide 34 Guidelines should result in a dependable CRM.

• ISO begins with a solid foundation of a Validated Method. • They build on it with the additional support of QC Samples • ISO then requires the creation of an error budget for determining Uncertainty. • All of this builds to yield a Certified Value with it’s Uncertainty. • So why might there be a need to make this even more robust?

CerAfied Value

Uncertainty

Q C

Validated Method (based on NaAonal Standard )

17.21 Method Validation

Two independent methods are better than one .

• What if the CRM is method specific? • Using two methods validated by two independent National Standard CRMs solidifies that foundation. • Each method has it’s own series of QC samples. • Each methods requirs the creation of an Uncertainty Budget. • There is one final step...

Cer

Certified Value

Uncertainty Budget

Uncertainty Budget

Q C

Q C

Validated Method

Validated Method