A theoretical analysis IS presented to describe the deposltlon of Browman particles onto hydrogen bubbles under surface mteractlons Smgle collectlon efficiency has been numencally calculated for zeta potent&s, havmgassumed that theeffe&veHamaker constant IS equal to 3 0 x lo-l1 erg though our choice of Hamaker constant IS rather arbitrary From a mass balance, total collection efficiency or the rate of flotation has been determined In this way, electro-flotation process 1s quantltatlvely described Expenmentally, the eiectro-flotation of polystyrene latlces of mean diameter 0 6pm has been studred to examme the effect of the charge on both particles and bubbles on the total collection efficiency The bubbles were of mean diameter 20 pm The electrolyte was AlCI, To measure the charge on the bubbles, we directly sampled solution mcludmg very small bubbles with a glass tube from a flotatron vessel and poured mto a micro-electrophoresls cell The honzontal veloctty measured when the bubbles rose up a "stationary level" m the cell under the known potential gradrent gave the electromoblhty The charge on the latex particles were found to change Its sign from negative to posltlve as flotation time went on The theoretlcal total collection efficiency has been m Llose agreement with the expenmentally determmed one