at both these stages plasma actively took up both copper and zinc from dialysis fluid , even against a concentration gradient , so that loss of these metals from plasma to dialysis fluid did not occur.in the dialysis systems investigated the sources of the copper in the dialysis fluid were the copper plumbing of the tap-water and the dialysis coil , and the major source of zinc was the zinc oxide of the adhesive plaster around the dialysis coil .
C0043481
zinc
C0043491
zinc oxide