|Values are valid only on day of printing.|
p-Nitrocatechol sulfate (2-hydroxy-5-nitrophenyl sulfate) is used as an analog to the natural substrate. The reaction yields p-nitrocatechol, which is measured at 515 nm.(Shapira E, Blitzer MG, Africk DK, et al: Enzyme assays: arylsulfatase A activity, biochemical genetics. A Laboratory Manual, 1989, pp 41-42)
Specimens are processed Monday through Sunday.
Assay is performed Tuesday; 8 a.m.