External Quality Assessment Schemes
Lyophilized samples (5 mL) of human sera with added enzymes and proteins of human origin.
2 liquid samples (minimum 2.5 mL) of whole blood. The samples contain stabilized human red blood cells, white blood cells and platelets of human and/or non-human analogs.
Lyophilized sample (minimum 3 mL) of human sera with added analytes.
2 liquid samples (1 mL) of human plasma.