[labnetwork] SPM spikes, bath life, (Sulphuric Peroxide Mixture)

[Macdonald, Robert (GE Aerospace, US)]

Wondering who is operating SPM baths (Sulphuric Peroxide Mixture).

We heat Sulphuric to 120C (in a quartz bath), and spike with H2O2, at 1% by volume.

We are doing 10 spikes, or 1 week, then dispose/aspirate (the cooled) bath, whichever comes first.

Does anyone here have opinions or data on the number of spikes they allow?


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