Isolating particle objects for OBJ export

Hi All
I have an emitter object (sphere) and tiny icospheres attached to the particles in a simulation. I want to export the icosphere ‘particles’ as a sequence of OBJs but I cant isolate them from their emitter sphere.
I only want the particles and not the emitter object but they are one and the same at the moment.

Any idea how I can export the particle objects without their emitter (if that doesnt sound to contradictory in terms)
Thanks

Thanks