Whatman® nitrocellulose membrane filters

NC45 Membrane Circles, diam. 142 mm, pore size 0.45 μm

cellulose membrane, Whatman filter, membrane filter


pkg of 25 ea

mfr. no.

Whatman Article No., 28414971 (US reference)
Whatman, 10401131


142 mm

pore size

0.45 μm

正在寻找类似产品? Visit 产品对比指南

General description

Recommended for the majority of routine applications, this membrane is manufactured under strictly controlled conditions. The user will benefit from the performance improvements which are now available in Whatman membrane filters, including very narrow pore size distribution and low levels of extractables.

Higher strength and flexibility:

Most membranes are inherently brittle and difficult to handle; it is not uncommon for filters to be damaged during loading into holders or while in use. Whatman cellulose nitrate membrane filters have a noticeably improved flexibility and are made to tolerate abuse during handling, loading and autoclaving without sacrificing integrity. These membranes are among the strongest of their type available, as measured and compared by burst pressure tests.

Low extractable levels:

The level of extractables in membrane filters has become more important with advances in filtration or adsorption techniques. In particular, pharmaceutical, immunological and biomedical tissue culture and trace analysis applications can be adversely affected by high extractable levels. Whatman cellulose nitrate membrane filters have a low level of extractables, generally below that of other membranes of a similar type.

Narrow pore size distribution:
One of the major features of Whatman membrane filters is the narrow distribution of pore sizes. The rated pore size of these membranes is closely controlled due to the advanced manufacturing and control system. Additionally, the batch-to-batch variation is minimized providing more consistent laboratory results.

Increased temperature stability:
Membrane filters are normally autoclaved at 121°C without loss of integrity. Cellulose nitrate membranes are supplied as circles, sheets or reels.

Reduced shrinkage:
Excessive shrinkage can cause problems during autoclaving and is often the cause of membranes tearing in their holders after autoclaving. It may also cause a reduction in flow rate and total throughput. Whatman membranes exhibit a low shrinkage during autoclaving.

  • Sample preparation
  • Microbiological studies
  • Filtration of aqueous solutions

Other Notes

Global SIAL customers (excluding Japan) can now order any product from the Cytiva Life Sciences consumables portfolio (prepack only) using GE′s product numbering system.

The legacy GE Whatman products that use the SIAL "Z" product numbering system will be discontinued and directly replaced with a product number using a "WHA" prefix plus the GE product code. For reference, the legacy "Z" product number is identified as a synonym on the "WHA" product number listing.

Legal Information

Whatman is a registered trademark of Cytiva
原产地证书 (CofO)
Dori M Landry et al.
Genes & development, 23(23), 2753-2764 (2009-12-03)
Most eukaryotic mRNAs are translated using a cap-dependent mechanism of translation. However, approximately 10% of mammalian mRNAs initiate translation using a cap-independent mechanism that is not well understood. These mRNAs contain an internal ribosome entry site (IRES) located in the...




LinkedIn icon
Twitter icon
Facebook Icon
Instagram Icon




© 2021年版权归德国达姆施塔特默克集团(Merck KGaA)及/或其附属公司所有。版权所有。