Filter Membrane Selection for Liquid Chromatography
The liquid chromatography is a qualitative and quantitative analytical instrument with high precision and sensitivity. During the use of the liquid chromatography to detect the samples, the purity requirements for the sample and mobile phase are quite high. the filter membrane plays a key role in the removal of impurities. It is necessary to properly choose the filter membrane depending on the mobile phase solution.
Aqueous Filter Membrane
The aqueous filter membrane is very suitable for water-based solutions. It has high chemical and thermal stability, which could highly resist to the strong acid and alkaline solutions. Meanwhile, it possesses high mechanical strength and a fast flow rate. It also has low adsorption capacity to proteins. Nevertheless, it is not resistant to organic solvents.
Organic Filter Membrane
The organic filter membrane is a hydrophobic membrane, which is used for organic solvents and air filtration. It is resistant to acids, alkaline, and antioxidants because of its stable chemical properties. Therefore, it is not only perfect for aqueous solutions containing acid and alkaline, but also for organic solvents such as alcohols, hydrocarbons, lipids, phenols, ketones, etc.
Nylon Filter Membrane
The Nylon filter membrane has good hydrophilicity and quite high resistance to acid and alkaline solvents. Like the organic filter membrane, it is usable for both aqueous solutions containing acid and alkali and organic solvents.