There are several techniques used in chemistry labs to separate mixtures, including filtration, chromatography, distillation, and centrifugation. Filtration uses a filter paper to separate insoluble residue from soluble filtrate. Chromatography separates dyes based on their differing stickiness to paper as they move up the paper with a solvent front. Distillation involves boiling a liquid mixture and condensing the vapor to separate components with different boiling points.
Dye penetrant inspection, also called liquid penetrate inspection or penetrant testing, is a widely applied and low-cost inspection method used to check surface-breaking defects in all non-porous materials.
This presentation is intended to provide an introduction to the NDT method of penetrant testing. Penetrant Testing (PT) is a non destructive testing method that builds on the principle of Visual Inspection.
Dye penetrant inspection, also called liquid penetrate inspection or penetrant testing, is a widely applied and low-cost inspection method used to check surface-breaking defects in all non-porous materials.
This presentation is intended to provide an introduction to the NDT method of penetrant testing. Penetrant Testing (PT) is a non destructive testing method that builds on the principle of Visual Inspection.
10. At the start the dyes are placed in the solvent in a closed container The chromatogram at the end of the run. The sovent front is marked with a pencil
11. Chromatography This is what it may look like whilst the solvent front rises up the paper. One doesn’t always need expensive apparatus!
12. The results can look complicated BUT, with the help of R f values we can simplify them
17. FRACTIONAL DISTILLATION Fractional distillation This differs from simple distillation by using a fractionating column between the flask and the cold water condenser. It may be used to separate liquids with closer boiling points