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In HPLC analysis, the column packing particle size is small and easily syringe filters blocked by foreign particles, so the sample and solvent need to be pre-filtered to remove particulate contaminants and protect the instrument. Ion chromatography, which is commonly used in environmental analysis, also requires the introduction of inorganic contaminants in sample preparation. Needle filters can be used in HPLC analysis and IC analysis to filter sample solutions as an important step in sample preparation.
Use
This product is mainly used for the filtration of mobile phase and sample in chromatographic analysis. It has a good effect on protecting the column and infusion pump tube system and injection valve from contamination. Widely used in gravimetric analysis, microanalysis, colloid separation and sterility testing.
2. Type: water system, organic media system.
3. The performance characteristics of the filter material in the needle
A. PTFE (polytetrafluoroethylene)
Performance: Suitable for water system and various organic solvents, resistant to all solvents, low solubility. It has the characteristics of permeable, water-tight, high gas flux, high particle retention, good temperature resistance, strong acid, alkali, organic solvent and oxidant, anti-aging and non-stick, non-combustible and non-toxic, biocompatible. Its related products are widely used in chemical, pharmaceutical, environmental, electronics, food, energy and other fields.
B. Water system PES (polyether sulfone)
Performance: This product is imported from Germany MEMBRANA company, syringe filters with high chemical and thermal stability, fast flow rate, strong acid and alkali resistance (pH range 1-14); high mechanical strength.
C. Organic nylon 6 (domestic)
Performance: It has good hydrophilicity, acid and alkali resistance, and antioxidant. It is not only suitable for aqueous solutions containing acid and alkali, but also for organic solvents such as alcohols, hydrocarbons, lipids, phenols, ketones and the like.
D. Organic Nylon 66 (UK imports)
Performance: better than domestic nylon 6 performance, this product is suitable for most organic solvents and aqueous solutions, can be used for strong acid, 70% ethanol, dichloromethane and other organic solvents. High temperature resistance, good strength and stable chemical properties.
E. Polyvinylidene fluoride PVDF (US imports)
Properties: Polyvinylidene fluoride membrane is chemically stable and inert, suitable for chemically corrosive organic solvents, strong acid and strong alkali solutions, sample preparation in high performance liquid chromatography. It has hydrophobic properties and can filter out air and syringe filters The water in the gas. The polyvinylidene fluoride film is laminated on the support net, has strong strength and operability, and can withstand high temperatures of 130 degrees.
This is the end of the introduction of Description of the use of the needle syringe filters. I hope it can help you.
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