A Sudan Test is a test being developed by scientist.
(It mostly involves Biology)
For your information; Biology is got to do with humans(genes) And animals..
edited: 21 November 2009
Sudan (III) is used to identify the presence of lipids in liquids, it stains fat cells red.
Tests for lipids such as fats and oils based on their ability to selectively absorb pigments in fat-dyes such as the Sudan IV. The test will make red globs appear if it is indeed a lipid.
Sudan III test
The chemical Sudan IV is not soluble in water; it is, however, soluble in lipids. Therefore to test for the presence of lipids in a solution you will use a Sudan IV Test. In this test dark red Sudan IV is added to a solution along with ethanol to dissolve any possible lipids. If lipids are present the Sudan IV will stain them reddish-orange, giving a positive test.
If no lipids are present, the red dye will sink to the bottom of the test tube. Sudan (iv) is not soluble in water but soluble in lipid.
Sudan III is used to detect the presence of lipids.
Sudan IV is only soluble in certain solvents.
Usually water is the best control substance for the Sudan IV test.
Ive searche on the Internet to find an answer to why it's called the 'Sudan' Iv test, but I haven't found a clear answer, but my guess is that the things used in the test, was first discovered in a mine in Sudan, that or the inventor was Sudanese
Like lipids, the chemical Sudan IV is not soluble in water; it is, however, soluble in lipids. Therefore to test for the presence of lipids in a solution you will use a Sudan IV Test. In this test dark red Sudan IV is added to a solution along with ethanol to dissolve any possible lipids. If lipids are present the Sudan IV will stain them reddish-orange, giving a positive test.
Egg yolk should have a reaction in the Sudan IV test, because the Sudan IV tests for lipids (fats), and the yolk does have some fat in it. The Sudan IV test should have not had a reaction for egg membrane or egg white. Hope that helped!
to test for the presence of lipids.
Sudan III test
lipids
The chemical Sudan IV is not soluble in water; it is, however, soluble in lipids. Therefore to test for the presence of lipids in a solution you will use a Sudan IV Test. In this test dark red Sudan IV is added to a solution along with ethanol to dissolve any possible lipids. If lipids are present the Sudan IV will stain them reddish-orange, giving a positive test.
Sudan IV is a chemical that is only soluble in lipids. This indicates that a positive Sudan IV test means that the food is a significant source of lipids.
If no lipids are present, the red dye will sink to the bottom of the test tube. Sudan (iv) is not soluble in water but soluble in lipid.
Sudan III is used to detect the presence of lipids.
Sudan IV is a diazo dye for staining lipids, lipoproteins, and triglycerides. It is used in Sudan staining, wherein it attaches to the fats chemically.