Terminology in the chemical industry“silica gel plate”It is just an abbreviation, and its full name should be called thin-layer chromatography silica gel plate, also known as high tear resistant silica gel plate. It is made by spraying high-purity thin-layer chromatography silica gel (powder) with a certain amount of adhesive, and its surface is usually glass. It is more popular abroad to use aluminum foil as the attachment surface.

It is made by spraying high-purity thin-layer chromatography silica gel (powder) with a certain amount of binder, and its surface is usually made of glass. This year, aluminum foil has become popular abroad for attaching the surface. Require the board surface to be pure white, flat, uniform, and fine. The main component is SiO2 · nH2O, which is chemically stable and does not react with other acids or bases except for strong bases and hydrogen * acids. Thin layer chromatography silica gel plates can be directly used for qualitative or quantitative analysis of various types of organic substances, and have been widely used in the identification of trace impurities and main components in pharmaceuticals, pesticides, Chinese herbal medicines, organic chemical products, as well as grains and food. Silicone plate is made of high-quality thin-layer chromatography silica gel as raw material. Thin layer chromatography silica gel plate, thin layer chromatography silica gel plate, is made by coating a glass substrate with appropriate adhesive mixed with thin-layer chromatography silica gel, and has specified pore volume, specific surface area, and pore distribution.

Activity: (Separation of Indigo, Sudan Red, and Dimethyl Yellow) Three color separation.

feature

1. Good separation effect and high number of trays.

2. The sampling spots are small, making it easy for series analysis.

3. Short separation time.

4. High sensitivity, clear spots, and no diffusion.

Can be directly used for rapid separation - qualitative or quantitative analysis of various types of organic substances. It has been widely used in the identification of trace impurities and main components in pharmaceuticals, pesticides, traditional Chinese medicine, organic chemical products, as well as grains and food.

How to make

When preparing silicone plates, most rely on experience and pay attention to the speed of the liquid flowing downwards. During operation, it is necessary to evenly and uniformly spread it on the glass slide, then scoop a spoonful and pour it into the middle of the slide to slowly cover the entire surface of the plate. After that, gently shake it with your hand a few times, and remember not to have any bubbles.

Different types of silicone have different gypsum contents, which is reflected in the viscosity of the silicone. The higher the gypsum content, the more viscous it is. There are labels on the bottles that sell silicone, for example, silicone H is very loose, and silicone G generally has a moderate viscosity.

Divided by molding process

Silicone plate is made of high-quality thin-layer chromatography silica gel as raw material. Thin layer chromatography silica gel plate, thin layer chromatography silica gel plate, is made by coating a glass substrate with appropriate adhesive mixed with thin-layer chromatography silica gel, and has specified pore volume, specific surface area, and pore distribution. The silicone panels on the market are mainly divided into two types according to the molding process.

1、 Squeeze out silicone sheet.

Extruded silicone sheet is formed by an extrusion molding machine. The extruded silicone sheet, like ribbon, can be looped together for several meters and can be freely cut to length.

Advantages: Fast maneuverability, low cost, high output, fast production speed, free cutting length, uniform thickness.

Disadvantage: In the later stage, it is necessary to use a punching die to cut out specific shapes,

2、 Molded silicone plate.

Molded silicone sheet is a fixed size silicone sheet formed by high-temperature vulcanization using a silicone mold. The silicone sheet has a limited area and a fixed length and width.

Advantages: Stable production, good raw material quality, easy control of color, hardness, and raw material grade, consistent size.

Disadvantages: Low production volume, 2-3 times the cost of extruding silicone adhesive sheets, uneven thickness.

The above is today's discussion on what is a silicone board? What is its function? I have introduced everything, hoping it can be helpful to everyone.