Hi all, I need some information on this. I am using Fluorescent Carboxyl Magnetic particles (SPHEROTEC Inc) which will be passed through a Borosilicate glass capillary. Now what I have observed during the flow of the above magnetic particles (dispersed in H20), some of the particles are sticking to the glass surface. So can anyone suggest that any pretreatment of the glass capillary will solve the problem? Regards Asfer