Subject: How can I monitor the rate of a reaction between H2O2 and KMnO4 ?

I got the idea from the MAD Scientist site for using this reaction, to study 
rates with varying concentrations of Hydrogen peroxide and Potassium 
Permandanate as an A-Level chemistry project. I have tried collecting the 
oxygen, and noting the volume of oxygen produced over time (5 second 
intervals). I wanted to also try using conductivity (which should change due to 
the release of Manganese ions), colour change, and pH. I am having teething 
problems with these methods because the reaction is so vigerous at the start. I 
have been testing the methods with 0.1molar solutions of both reagents, but 
even when diluted by a factor of ten, seem too vigerous to monitor effectively. 
Can you sugg

Re: How can I monitor the rate of a reaction between H2O2 and KMnO4 ?