Dear Colleques

I am trying to build a method for determination of hydrogen peroxide in dried fruits and I am using titanic acid to get a measurable sign of it. my problem is the retention time of peroxotitanic acid. in a classic c18 column peroxotitanic acid which is formed in the reaction of titanic acid and hydrogen peroxide comes with other impurities and i could not define its peak. would you please recommend another column or derivatisation agent?
another method would be ok for me too :)