Design of a quality control scheme to assess sample preparation performance for the determination of deoxynivalenol in wheat

What is it about?

Proficiency testing is a useful tool to assess and monitor the performance of an analytical method, but the use of comminuted test samples precludes the assessment of sample handling and preparation. Test material consisting of whole grain wheat containing a known and consistent amount of deoxynivalenol was prepared and used by 14 participants to assess their variance due to sample preparation. Sample preparation variance was significantly lower for participants that had comminuted the entire test sample as opposed to comminuting only a portion. The whole grain test samples provided participants with a straightforward and controlled process to assess their sample preparation fitness for purpose.

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