Membrane filters, cellulose nitrate, non sterile, Whatman™

供应商: Whatman products (Cytiva)

Whatman™
WHAT7188-009EA 0 CNY
WHAT7188-009 WHAT7190-002 WHAT7188-003 WHAT10401126 WHAT10402012 WHAT10400112 WHAT7184-002 WHAT7184-001 WHAT10400014 WHAT7186-004 WHAT7184-009 WHAT10401121 WHAT7182-004 WHAT10402014 WHAT7193-002 WHAT10405079 WHAT10401131 WHAT7191-014 WHAT7184-014 WHAT7182-009 WHAT7195-004 WHAT7182-014 WHAT7184-005 WHAT10401312 WHAT10400106 WHAT7182-001 WHAT7181-004 WHAT7188-002 WHAT10400012 WHAT10401106 WHAT10401118 WHAT7188-004 WHAT10400206 WHAT7184-004 WHAT10400212 WHAT7191-005 WHAT7195-009 WHAT10401112 WHAT7181-002 WHAT10400214 WHAT10401314 WHAT7190-004 WHAT7195-002 WHAT7193-004 WHAT7182-002 WHAT10401114 WHAT10400114
Membrane filters, cellulose nitrate, non sterile, Whatman™
过滤器 膜过滤器
Cellulose nitrate membranes, circles, plain. Recommended for the majority of routine applications, this membrane is manufactured under strictly controlled conditions.

  • Narrow pore size distribution for improved surface capture and analysis
  • Low levels of extractables to ensure sample integrity

The user will benefit from the performance improvements that are now available in Whatman membrane filters, including very narrow pore size distribution and low levels of extractables. 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.

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.

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 an advanced manufacturing and control system. Additionally, batch-to-batch variation is minimised providing more consistent laboratory results.

Membrane filters are normally autoclaved at 121 °C without loss of integrity. Cellulose nitrate membranes are supplied as circles, sheets, or reels. 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 low shrinkage during autoclaving.

This is the standard membrane filter for the majority of laboratory applications involving particles and cells in the range of 0,1 to 12,0 µm. The residue after filtration is found to be almost completely on the surface of the membrane allowing physical recovery of deposits and microscopic examination.
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