What is Chromatography?

Question

QC,R&D chemical labs

Answer 1

Chromatography is the name of the science that studies the separation of mixtures as they pass through various media.
An easy experiment you can do at home is a paper chromatograph. Cut a coffee filter into a strip and make a dark ink spot about a third from an end. Put that end into a full glass of water and drape the rest of the strip down the outside of the glass. Water will wick out of the glass and down the strip. The water will push the ink mixture through the paper and you can see different colors separate out into bands.
You are seeing an example of chromatography whenever you see a DNA analysis. Those bands are created by the seperation of different dna molecules as electricity pushes them through stuff that resembles jello.
Essentially, different molecules in a mixture have different shapes and sizes. Some can move through a medium very easily while others move slowly. Imagine a situation where you and 3 of your buddies are pushing things across a flooded road and it's a race. You are pushing an empty grocery cart and your buds are pushing a wheel barrow, a car and a bus. When you cross the finish line, you are in front with the wheel barrow close behind. The car is a few meters out and the bus is barely off the line. In this scenario, the stationary medium is the flooded road, and the mixture is the variety of things on wheels.
Chromatography studies how different media, different "pushing forces", and different mixtures affect a separation.

Answer 2

Chromatography is a widely employed laboratory method for analyzing complex mixtures (such as ink) ... Chromatography is used to separate and identify all sorts of substances

Chromatography involves a sample (or sample extract) being dissolved in a mobile phase (which may be a gas, a liquid or a supercritical fluid). The mobile phase is then forced through an immobile, immiscible stationary phase. The phases are chosen such that components of the sample have differing solubilities in each phase. A component which is quite soluble in the stationary phase will take longer to travel through it than a component which is not very soluble in the stationary phase but very soluble in the mobile phase. As a result of these differences in mobilities, sample components will become separated from each other as they travel through the stationary phase.

Answer 3

Chromatography is a method of separation between substances in a solution, based on their affinity to the diluent or the media. The weight and density of the substances will also affect their movement through the chromatographic column. Drugs of abuse and their metabolites, sugars , etc. can be separated making use of this method then can be quantitated to determine their concentration.

Answer 4

Chromatography (from Greek χρώμα: chroma, colour) is the collective term for a family of laboratory techniques for the separation of mixtures. It involves passing a mixture which contains the analyte through a stationary phase, which separates it from other molecules in the mixture and allows it to be isolated.

Answer 5

In chemistry, analytical technique used for the chemical separation of mixtures and substances. The technique depends on the differential distributon of solute between the mobile and stationary phases.

Answer 6

chromatography is the method for seperation of two materials which disolve in same liquid but with different rate of solubility.

Answer 7

a form of seperation, to id a make-up of a product such as a soda pop WATERS CORP OF MILFORD MA. makes such instruments

Answer 8

same as pornography