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Description
Technical parameters
SPE Cartridge
Bulk Packing
Alumina-A has a slightly cationic nature through pretreatment with acidic solutions, so it is suitable for retention of neutral and anionic species.
Test Method of the Activity of Alumina
1 Definition of Activity
According to different water content, Alumina-N can be devided into five activity levels. Brockmann defines the alumina firing at 450 ℃ for 12h as I class, and Ⅱ、Ⅲ、Ⅳ、V class alumina are made of I class alumina mixed with 3%、6%、10%、15% water.
2 Testing
2.1 Chromatography Column: Glass chromatography column, φ15 mm×H150 mm, put a few of cotton wool on the bottom, load alumina for 50mm height, and knocked.
2.2 Solvent: Benzene + petroleum ether.
2.3 The preparation of activity testing solution: Follow the combination mode below, take each azo dyes 20g, and use solution（B.2.2）to constant volume to 50mL, then get the mixed dye solution.
First pair (I): azobenzene, AB and p-methoxyazobenzene, MAB；
Second pair (Ⅱ): MAB and Sudan I, S I；
Third pair (Ⅲ): Sudan Ⅲ and S Ⅲ；
Fourth pair (Ⅳ): Sudan Ⅲ and p-aminoazobenzene, AAB；
Fifth pair (Ⅴ): AAB and p-hydroxyazobenzene, HAB
2.4 Load 10mL each mixed dye solution to five pieces of alumina chromatography column,add 20mL solution（B.2.2）after mixed dye solution drain away. Check the migration of coloured dyes in column after all solution drain away to define the activity of alumina, as shown in the following figure. If the first pair of dye solution is completely absorbed in the column, the activity of alumina is I class. If MAB in the first pair of dye solution is absorbed in the column, but AB flow out, while two compounds in the second pair of dye solution are absorbed in the column, the activity of alumina is Ⅱ class. If MAB in the second pair of dye solution flow out, while two compounds in the third pair of dye solution are absorbed in the column, the activity of alumina is Ⅲ class. And so on.
Test Method of the Activity of Alumina
1 Definition of Activity
According to different water content, Alumina-N can be devided into five activity levels. Brockmann defines the alumina firing at 450 ℃ for 12h as I class, and Ⅱ、Ⅲ、Ⅳ、V class alumina are made of I class alumina mixed with 3%、6%、10%、15% water.
2 Testing
2.1 Chromatography Column: Glass chromatography column, φ15 mm×H150 mm, put a few of cotton wool on the bottom, load alumina for 50mm height, and knocked.
2.2 Solvent: Benzene + petroleum ether.
2.3 The preparation of activity testing solution: Follow the combination mode below, take each azo dyes 20g, and use solution（B.2.2）to constant volume to 50mL, then get the mixed dye solution.
First pair (I): azobenzene, AB and p-methoxyazobenzene, MAB；
Second pair (Ⅱ): MAB and Sudan I, S I；
Third pair (Ⅲ): Sudan Ⅲ and S Ⅲ；
Fourth pair (Ⅳ): Sudan Ⅲ and p-aminoazobenzene, AAB；
Fifth pair (Ⅴ): AAB and p-hydroxyazobenzene, HAB
2.4 Load 10mL each mixed dye solution to five pieces of alumina chromatography column,add 20mL solution（B.2.2）after mixed dye solution drain away. Check the migration of coloured dyes in column after all solution drain away to define the activity of alumina, as shown in the following figure. If the first pair of dye solution is completely absorbed in the column, the activity of alumina is I class. If MAB in the first pair of dye solution is absorbed in the column, but AB flow out, while two compounds in the second pair of dye solution are absorbed in the column, the activity of alumina is Ⅱ class. If MAB in the second pair of dye solution flow out, while two compounds in the third pair of dye solution are absorbed in the column, the activity of alumina is Ⅲ class. And so on.
Review
Review
