For 10 points, name this type of chromatography commonly performed on silica gel plates.
Selection of reagents in this technique is often performed using the Prisma model, and for particularly complex samples multiple gradient development is often employed. In far-eastern blotting, this technique precedes a transfer to a PVDF membrane. Adding ninhydrin to the samples in this technique is a method to detect amines. Samples are commonly applied by using a small capillary tube. Commonly used on a panel of analgesics in introductory chemistry classes, this technique can use an iodine vapor as a developer. The retention factor is equal to the sample distance divided by the solvent front distance in this technique. It is also commonly used to separate the components of plant extracts. For 10 points, name this type of chromatography commonly performed on silica gel plates.
Selection of reagents in this technique is often performed using the Prisma model, and for particularly complex samples multiple gradient development is often employed.
{Thin}-{layer} chromatography or {TLC}