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2. Acetonitrile - Wikipedia

   en.wikipedia.org/wiki/Acetonitrile

   Acetonitrile is used mainly as a solvent in the purification of butadiene in refineries. Specifically, acetonitrile is fed into the top of a distillation column filled with hydrocarbons including butadiene, and as the acetonitrile falls down through the column, it absorbs the butadiene which is then sent from the bottom of the tower to a second separating tower.

3. High-performance liquid chromatography - Wikipedia

   en.wikipedia.org/wiki/High-performance_liquid...

   HPLC has many applications in both laboratory and clinical science. It is a common technique used in pharmaceutical development, as it is a dependable way to obtain and ensure product purity. [59] While HPLC can produce extremely high quality (pure) products, it is not always the primary method used in the production of bulk drug materials. [60]

4. Acetonitrile (data page) - Wikipedia

   en.wikipedia.org/wiki/Acetonitrile_(data_page)

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5. High-performance thin-layer chromatography - Wikipedia

   en.wikipedia.org/wiki/High-performance_thin...

   The spot capacity (analogous to peak capacity in HPLC) can be increased by developing the plate with two different solvents, using two-dimensional chromatography. [8] The procedure begins with development of a sample loaded plate with first solvent. After removing it, the plate is rotated 90° and developed with a second solvent.

6. Aqueous normal-phase chromatography - Wikipedia

   en.wikipedia.org/wiki/Aqueous_normal-phase...

   Mobile phases for ANPC are based on organic solvents as bulk solvents (such as methanol or acetonitrile) with a small amount of water as a modifier of polarity; thus, the mobile phase is both "aqueous" (water is present) and "normal phase type" (less polar than the stationary phase).

7. Micellar liquid chromatography - Wikipedia

   en.wikipedia.org/wiki/Micellar_liquid_chromatography

   Reverse phase high-performance liquid chromatography (RP-HPLC) involves a non-polar stationary phase, often a hydrocarbon chain, and a polar mobile or liquid phase. The mobile phase generally consists of an aqueous portion with an organic addition, such as methanol or acetonitrile.