Immunoglobulin E (IgE) is an antibody that is produced by the bodyâs immune system in response to a perceived threat. It is one of five classes of immunoglobulins (A, G, M, D, and E) and is normally present in the blood in very small amounts. This test measures the amount of IgE in the blood.mmunoglobulin E (IgE) is an antibody that is produced by the bodyâs immune system in response to a perceived threat. It is one of five classes of immunoglobulins (A, G, M, D, and E) and is normally present in the blood in very small amounts. This test measures the amount of IgE in the blood.
For example, in paper chromatography water is the mobile phase and paper is the stationary phase. The solution's components ideally move at different speeds as they travel through the stationary phase so that they can be separated. Take one of the paper towel strips you prepared and place the pencil line you drew on top of the now-colored drop of water. Do you see the dye soak into the strip, coloring the area around the line? You can get some extra dye on the line by dabbing the sides of the wet candy with it.
Chromatography is a pretty accurate description of what happens to ink on wet paper, because it literally means color writing (from the Greek words chroma and graphe). Really, though, it's a bit of a misnomer because it often doesn't involve color, paper, ink, or writing.Chromatography is actually a way of separating out a mixture of chemicals, which are in gas or liquid form, by letting them creep slowly past another substance, which is typically a liquid or solid.ere's a very simplified overview of what happens in the gas chromatography process: 1  The eluant (carrier gas) is introduced from a gas cylinder outside the machine. 2  It's called the carrier because that's exactly what it doesâcarry the sample we're studying through the machine.