The purification process may be very different according to the type of sample.

Choice of a starting material is key to the design of a purification process.

The primary process carried out the site was by distillation at 350C, in addition to further purification processes.

"After the water leaves the reservoirs, it goes through a purification process involving chlorine," he said.

The purification process also destroys most viruses that are not detected.

They take the Long Island water and put it through a purification process.

This was also given as part of the purification process for Tzaraat.

Sir Edward was specifically involved in the purification process and determination of its chemical structure.

The purification process will depend upon the end use intended for the oil.

Second, shortcuts had been taken in the purification process to reduce costs.