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What materials are used to coat a thin-layer chromatography plate?
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chromatography
Overview of the chemical technique of chromatography.
In thin-layer chromatography, plates are typically made of glass or plastic and coated with a thin layer of a finely ground adsorbent material.1
The most common adsorbents used for this coating include:
- Silica gel1
- Alumina (aluminum oxide)12
To ensure the adsorbent adheres properly to the plate, it is mixed with a binder, such as starch or plaster of paris. Once the mixture is spread onto the plate and dried, it serves as the stationary phase for the separation of chemical substances.13