Description
Specifications Table
Product Name – Whatman ME24/21 STL Membrane Filter
Quantity/Pack Size – 47MM, 0.2uM (Pack of 400) | 50MM, 0.2uM (Pack of 400)
Form – Membrane Disc
Grade – Sterile
Application – Microfiltration, Sterilization, Particle Analysis
Product Overview
The Whatman ME24/21 STL membrane filter is engineered for high-performance microfiltration, combining a 0.2?m pore size with superior chemical resistance and thermal stability. Constructed from mixed cellulose esters (MCE), this sterile-grade filter ensures reliable retention of microorganisms, particles, and contaminants, making it ideal for demanding laboratory applications. Its uniform pore structure guarantees consistent flow rates and filtration efficiency, while the hydrophilic nature of the membrane enhances wetting and throughput. The filter?s low extractables profile minimizes interference in sensitive analyses, ensuring accurate and reproducible results. Compatible with aqueous and organic solvents, it maintains integrity across a broad pH range (1?14), offering versatility for diverse protocols. The ME24/21 STL variant is particularly suited for applications requiring sterilization, clarification, or particulate monitoring, where precision and reliability are paramount. Each filter undergoes rigorous quality control to meet ISO 9001 standards, providing researchers with confidence in their filtration processes.
FAQs
1. What is the material composition of the Whatman ME24/21 STL membrane filter?
This filter is made from mixed cellulose esters (MCE), a blend of cellulose acetate and cellulose nitrate, offering a balance of strength, chemical resistance, and filtration efficiency.
2. Can this filter be used with organic solvents?
Yes, the Whatman ME24/21 STL membrane is compatible with a wide range of organic solvents, including alcohols, hydrocarbons, and mild acids/bases, though prolonged exposure to strong solvents may affect performance.
3. What is the maximum operating temperature for this filter?
The filter can withstand temperatures up to 120?C for short-term autoclaving or steam sterilization, but continuous use at elevated temperatures may compromise its structural integrity.
4. How should these filters be stored to maintain sterility?
Store the filters in their original packaging at room temperature (15?30?C) in a dry, clean environment. Avoid exposure to direct sunlight or humidity to prevent contamination or degradation.
5. Are there alternatives for applications requiring higher flow rates?
For higher flow rates, consider Whatman?s polyethersulfone (PES) or nylon membrane filters, which offer lower pressure drops while maintaining similar retention capabilities.
