I need a simple colorimetric or photometric method.
Hi,
the widely-used method is based on H2O2 degradation rate.
use the following link:
http://www.sigmaaldrich.com/technical-documents/protocols/biology/enzymatic-assay-of-catalase.html
Note:
Use trusty and reliable brand for H2O2. You should know the exact purity, although you can measure it.
Serum should be clear with no suspended particles.
Avoid hemolysis.
Good luck
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