6Gerhard Schumann, Ryozi Aoki, Carlo A Ferrero. IFCC primary reference procedures for the measurement ofcatalytic activity con- centrations of enzymes at 37~C [-J~. Clin Chem Lab Med ,2006:44 (9).
7Katsuhiko Kuwa. Scientiifc Division of Japan Society of Clinical Chemistry~ Proposed standard for certified enzyme reference mate- rials(ERM) [-J~. Japan J Chem, 2000,29 ~ 77-92.
8Kruse/Jarres J D. C. Kaiser Evalution of a new a Amylase Assay Using 4, 5-Ethylidene-( GT)-l-4-nitrophenyl-( G1 )-a-D-maltohep taosideEJ~. Clin. Biochem, 1989,27 : 103-113.
9Georges F, John E,Takashi K. Validation of an Enzyme Calibrator- An IFCC Guideline~P II S0009-9120 (98) 00039--33 I-J]. Clin Bio- chem, 1998,31(6) :495-500.