MAXIMILIAN STOCK LTD / SCIENCE PHOTO LIBRARY MAXIMILIAN STOCK LTD / SCIENCE PHOTO LIBRARY
Chemical dialysis. Scientist views a purified solution obtained after its separation from colloid chemicals using dialysis. During dialysis an impure solution is placed in a semi- permeable membrane (spheres) which is immersed in a pure solvent. Some of the chemicals within the membrane may pass out into the solvent by diffusion. The chemicals that remain trapped within the membrane are called colloids. Colloids usually consist of large molecules & tiny particles, although their exact composition depends upon the nature of the membrane. Photographed in the petrochemical industry.
Model release available. Property release not required.