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产品名称: whatman硝酸纤维素滤膜
产品型号: 7182-004 7182-002 7184-002 7184-004
产品展商: 上海摩速科学器材有限公司

简单介绍
whatman硝酸纤维素滤膜孔径0.2～1.2um，尺寸13～293mm，多种规格，有无菌膜7182-004 7182-002 7184-002 7184-004

whatman硝酸纤维素滤膜的详细介绍

whatman硝酸纤维素滤膜

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.

whatman硝酸纤维素滤膜

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.

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

    Applications
    • Sample preparation
    • Microbiological studies
    • Filtration of aqueous solutions

    Filter types

    White plain filters
    This is the standard membrane filter for the majority of laboratory applications involving particles and cells in the range of 0.1 µm to 12.0 µm. The residue after filtration is found to be almost completely on the surface of the membrane and allows physical recovery of deposits and microscopic examination.

    Gridded filters
    Gridded filters makes it easier to count particles, microorganisms and colonies. If a gridded membrane is required please see Mixed Cellulose Ester Membranes.

    Typical Data - Cellulose Nitrate Membranes
     Cellulose Nitrate
    Thickness105 to 140 µm
    Burst strength> 2 psi
    Weight3.6 to 5.5 mg/cm2
    Maximum service temperature80ºC
    Porosity66 to 84%
    Steam autoclavableYes
    HydrophilicYes

     

    Typical Applications - Cellulose Nitrate Membranes
    Field of applicationPore size (µm)
    General 
    Microfiltration0.1
    Ultracleaning0.1
    Sterilizing0.2
    Bulk bacterial removal0.45
    Analytical precipitates0.65
    Clarifying filtration1
    Particle removal5
    Water microbiology and analysis
    Bacterial colony count0.45 (gridded) - See Mixed Cellulose Ester membranes
    Sediment analysis0.45
    Suspended particles5
    Air pollution monitoring
    Asbestos monitoring (NIOSH)0.8
    Food and beverage QC
    E. coli and Coliforms0.45 (gridded) - See Mixed Cellulose Ester membranes
    Total bacteria count0.2
    Tissue culture
    Mycoplasma removal0.1
    Sterile filtration0.2

Ordering Information - Cellulose Nitrate Membranes
Catalog NumberDescription
Cellulose Nitrate - Plain (White)
0.025 µm Pore Size
10402206Cellulose nitrate circles, 0.025 µm, 25 mm 100/pk
0.1 μm Pore Size
7181-002Cellulose nitrate circles, plain, 0.1 µm 25 mm 100/pk
7181-004Cellulose nitrate circles, plain, 0.1 µm 47 mm 100/pk
10402014Cellulose nitrate circles, plain, 0.1 µm 50 mm 100/pk
0.2 µm Pore Size
7182-001Cellulose nitrate circles, plain, 0.2 µm 13 mm 100/pk
7182-002Cellulose nitrate circles, plain, 0.2 µm 25 mm 100/pk
7182-004Cellulose nitrate circles, plain, 0.2 µm 47 mm 100/pk
10401314Cellulose nitrate circles, plain, 0.2 µm, 50 mm 100/pk
7182-009Cellulose nitrate circles, plain, 0.2 µm 90 mm 25/pk
7182-014Cellulose nitrate circles, plain, 0.2 µm 142 mm 25/pk
0.45 µm Pore Size
7184-001Cellulose nitrate circles, plain, 0.45 µm 13 mm 100/pk
7184-002Cellulose nitrate circles, plain, 0.45 µm 25 mm 100/pk
10401107Cellulose nitrate circles, plain, 0.45 µm, 30 mm 100/pk
7184-003Cellulose nitrate circles, plain, 0.45 µm 37 mm 100/pk
7184-004Cellulose nitrate circles, plain, 0.45 µm 47 mm 100/pk
10401170Cellulose nitrate circles, plain, sterile, 0.45 µm 47 mm 100/pk
10401114Cellulose nitrate circles, plain, 0.45 µm, 50 mm 100/pk
7184-008Cellulose nitrate circles, plain, 0.45 µm 82 mm 25/pk
7184-009Cellulose nitrate circles, plain, 0.45 µm 90 mm 25/pk
10401121Cellulose nitrate circles, plain, 0.45 µm, 100 mm 50/pk
10401126Cellulose nitrate circles, plain, 0.45 µm, 110 mm 50/pk
7184-014Cellulose nitrate circles, plain, 0.45 µm 142 mm 25/pk
7184-029Cellulose nitrate circles, plain, 0.45 µm 293 mm 25/pk
0.65 µm Pore Size
7186-004Cellulose nitrate circles, plain, 0.65 µm 47 mm 100/pk
0.8 µm Pore Size
7188-002Cellulose nitrate circles, plain, 0.8 µm 25 mm 100/pk
7188-003Cellulose nitrate circles, plain, 0.8 µm 37 mm 100/pk
7188-004Cellulose nitrate circles, plain, 0.8 µm 47 mm 100/pk
7188-009Cellulose nitrate circles, plain, 0.8 µm 90 mm 25/pk
1 µm Pore Size
7190-002Cellulose nitrate circles, plain, 1 µm 25 mm 100/pk
7190-004Cellulose nitrate circles, plain, 1 µm 47 mm 100/pk
7190-009Cellulose nitrate circles, plain, 1 µm 90 mm 25/pk
1.2 µm Pore Size
7191-005Cellulose nitrate circles, plain, 1.2 µm 50 mm 100/pk
7191-014Cellulose nitrate circles, plain, 1.2 µm 142 mm 25/pk
3 µm Pore Size
7193-002Cellulose nitrate circles, plain, 3 µm 25 mm 100/pk
7193-004Cellulose nitrate circles, plain, 3 µm 47 mm 100/pk
5 µm Pore Size
7195-002Cellulose nitrate circles, plain, 5 µm 25 mm 100/pk
7195-004Cellulose nitrate circles, plain, 5 µm 47 mm 100/pk
10400214Cellulose nitrate circles, plain, 5 µm, 50 mm 100/pk
7195-009Cellulose nitrate circles, plain, 5 µm 90 mm 25/pk
8 μm Pore Size
10400106Cellulose nitrate circles, plain, 8 µm, 25 mm 100/pk
10400109Cellulose nitrate circles, plain, 8 µm, 37 mm 100/pk
10400112Cellulose nitrate circles, plain, 8 µm, 47 mm 100/pk
10400114Cellulose nitrate circles, plain, 8 µm, 50 mm 100/pk
10405079Cellulose nitrate circles, plain, with hydrophobic rim, 8 µm 50 mm 100/pk
10400121Cellulose nitrate circles, plain, 8 µm, 100 mm 50/pk
10400132Cellulose nitrate circles, plain, 8 µm, 150 mm 25/pk
12 µm Pore Size
10400012Cellulose nitrate circles, plain, 12 µm, 47 mm 100/pk
10400014Cellulose nitrate circles, plain, 12 µm, 70 mm 100/pk



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