The tracer, prepared by conventional chloramine T oxidation, was purified using isocratic reverse phase high pressure liquid chromatography.

Affinity tags are appended to proteins so that they can be purified from their crude biological source using an affinity technique.

The digested products were purified using Microcon YM-3 columns followed by centrifugation at 8000 g for 30-60 minutes.

In ayurveda, toxic ingredients, which sometimes include heavy metals such as mercury, are claimed to be purified using a process of prayer and pharmacy.

Some metals are purified using their iodides.

The resulting crude cell suspension is purified using a Ficoll-Hypaque gradient and resuspended in culture medium.

The mutant and wild type endonucleases were both purified using the previously described method [23].

But plutonium suitable for bombs can be purified using relatively simple chemical steps.

In these places water is purified using plants and animals.

Cholesterol can be purified using small Sephadex LH-20 columns.