A/O regents

[ForzaItalia]

Hi All

Does anyone know how long the sodium hydroxide and hydrogen peroxide regents for AO SO2 test stay good for?

Thanks!

 

[JohnT]

I make it a habit to toss them out after a year.

 

[ForzaItalia]

Thanks John T. Just to clarify, I am not using a vinimetrica to test SO2. I am using the aeration oxidation method where I dilute the sodium hydroxide to .01n and hydrogen peroxide.