Description

Specifications Table

Product Name – Whatman ME29 ST Membrane Filter
Quantity/Pack Size – 100 filters (50mm diameter, 3.0µm)
Form – Circular membrane discs
Grade – Mixed cellulose ester (MCE)
Application – General filtration, particle retention, sample clarification

Product Overview

The Whatman ME29 ST membrane filter is engineered for high-performance filtration in laboratory settings, offering a 3.0µm pore size that ensures efficient particle retention while maintaining optimal flow rates. Constructed from mixed cellulose esters (MCE), this filter combines mechanical strength with chemical compatibility, making it suitable for a wide range of aqueous and organic solutions. The sterile design minimizes contamination risks, while the 50mm diameter provides ample surface area for consistent filtration results. Its uniform pore structure guarantees reproducible data, critical for applications requiring precision. The membrane’s hydrophilic nature allows for rapid wetting and even sample distribution, reducing processing time. Durable yet flexible, the ME29 ST resists tearing during handling and maintains integrity under standard autoclaving conditions. Whether used for routine sample preparation or specialized analytical workflows, this filter delivers reliability and consistency, backed by Whatman’s reputation for quality in laboratory consumables.

FAQs

1. What is the chemical compatibility of Whatman ME29 ST membrane filters?

These filters are compatible with most aqueous solutions, mild acids, and alcohols. Avoid strong acids, bases, or organic solvents that may degrade cellulose esters.

2. Can these filters be autoclaved for sterilization?

Yes, Whatman ME29 ST filters can be autoclaved at 121°C for 15–20 minutes without compromising their structural integrity or filtration performance.

3. How does the 3.0µm pore size compare to other common filter sizes?

A 3.0µm pore size is ideal for retaining fine particulates, bacteria, and yeast while allowing faster flow rates than smaller pore sizes like 0.45µm or 0.22µm.

4. Are these filters suitable for air or gas filtration?

While primarily designed for liquid filtration, they can be used for air/gas applications with low particulate loads, but specialized air filters may offer better performance.

5. What alternatives exist if I need a different pore size?

Whatman offers ME29 filters in pore sizes ranging from 0.1µm to 8.0µm. For non-sterile options, consider Whatman’s qualitative filter papers in similar grades.