Consult your local laboratory for guidelines as to normal values for the specific testing procedures used. Values in IU/L at 37°C (98.6°F) using p-nitrophenol phosphate buffered with AMP (kinetic). Note: Modified from: 1Soldin, S.J., Brugnara, C., & Hicks, J.M. (1999). Pediatric reference ranges. (3rd ed.). Washington, DC: AACC Press.