the procedure shows low imprecision ( median cv less than 3.2 % ) , and results for sera , plasma , and capillary and venous blood ( y ) correlate well with those of a conventional alpha-amylase method involving p-nitrophenyl ( pnp ) -maltoheptaoside substrate ( x ) ( for 209 blood samples : y = 0.981x + 9.7 ;
C0229671
sera
C0032105
plasma