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Membrane Filters, PTFE

Membrane Filters, PTFE

Tisch Scientific is your source for membrane filters and other micro-filtration devices. Our highest quality facility assures consistent quality across our wide variety of membrane filters. We offer competitive prices without compromising quality.

Whether you are performing simple bottle top filtration or operating a complex vacuum manifold system our expert staff is ready to help you with your membrane filter selections. Why not take advantage of over 30 years of experience in the business.

Beyond the expert advice we also offer a sample program and we’ll ship it to you right away.

Buy Membrane Filters here but first be informed. The Membrane Filter Technique (MF Technique) offers the advantage of isolating discrete colonies of bacteria, whereas the MPN procedure only indicates the presence or absence of an approximate number or organisms.The concentration of larger samples on a membrane filter is a key benefit of the technique over the MPN procedure as well as over Pour Plate and Spread Plate techniques.

Many industry and U.S. EPA test procedures require samples of 100 mL or more to be analyzed for the presence of bacteria. The Pour Plate technique is limited to a sample volume of 2 mL and the Spread Plate technique has a limit of 0.5 mL.

Using the Membrane Filter Technique, a 100 mL sample is passed through a 47 mm membrane using a filter funnel and vacuum system. Any organisms in the sample are concentrated on the surface of the membrane. The filter is then placed in a petri dish with nutrient medium. The passage of nutrients through the filter facilitates the growth of organisms on the upper surface of the membrane. The discrete colonies that form on the surface of the membrane can be easily transferred to confirmation media.

Municipal water treatment plants monitor drinking, waste, and surface water for the presence of coliform bacteria by the MF Technique. The key organism monitored in water treatment facilities is E. coli. The U.S. EPA considers this organism the leading indicator of fecal contamination.

In addition to its use by government labs for monitoring drinking water, the Membrane Filter Technique is also used for microbial monitoring in the pharmaceutical, cosmetics, electronics, and food and beverage industries. The MF Technique is used in these industrial labs to monitor the presence of microorganisms in process waters and final product.

The pharmaceutical and cosmetics industries typically focus on monitoring their process water for Pseudomonas species. The electronics industry monitors for any and all microorganisms because they must keep their process water free from even the smallest organisms. Microbial monitoring in the food and beverage industry typically employs several types of techniques because of the variety of samples that are encountered. Beverage samples can typically be monitored for microorganisms by the MF Technique, but when solid samples cannot be liquefied, alternative methods must be used.

1–36 of 62 items
  1. PTFE Membrane Filters, 1.0 um, 82.6mm, Nonsterile, 50 per pack, SF16015 PTFE Membrane Filters, 1.0 um, 82.6mm, Nonsterile, 50 per pack, SF16015

    Regular Price: $237.99

    Price $206.95

  2. PTFE Membrane Filters, 0.10 um, 90mm, Nonsterile, 50 per pack, SF15121 PTFE Membrane Filters, 0.10 um, 90mm, Nonsterile, 50 per pack, SF15121

    Regular Price: $269.91

    Price $238.61

  3. PTFE Membrane Filters, 0.22 um, 13mm, Nonsterile, 200 per pack, SF15124 PTFE Membrane Filters, 0.22 um, 13mm, Nonsterile, 200 per pack, SF15124

    Regular Price: $121.18

    Price $107.12

  4. PTFE Membrane Filters, 3.00 um, 142mm, Nonsterile, 50 per pack, SF15133 PTFE Membrane Filters, 3.00 um, 142mm, Nonsterile, 50 per pack, SF15133

    Regular Price: $548.88

    Price $485.21

  5. PTFE Membrane Filters, 0.22 um, 25mm, Nonsterile, 200 per pack, SF13855 PTFE Membrane Filters, 0.22 um, 25mm, Nonsterile, 200 per pack, SF13855

    Regular Price: $121.64

    Price $107.53

  6. PTFE Membrane Filters, 5.00 um, 150mm, Nonsterile, 50 per pack, SF13873 PTFE Membrane Filters, 5.00 um, 150mm, Nonsterile, 50 per pack, SF13873

    Regular Price: $336.32

    Price $292.45

  7.  PTFE Membrane Filters, 0.22 um, 25mm, Nonsterile, with PP substrate (Meets the requirements of USP Plastics Class VI) 200 per pack, SF17375 PTFE Membrane Filters, 0.22 um, 25mm, Nonsterile, with PP substrate (Meets the requirements of USP Plastics Class VI) 200 per pack, SF17375

    Regular Price: $140.30

    Price $126.88

  8. PTFE Membrane Filters, 0.45 um, 8 inch x 10 inch, Nonsterile, 20 per pack, SPEC17048 PTFE Membrane Filters, 0.45 um, 8 inch x 10 inch, Nonsterile, 20 per pack, SPEC17048

    Regular Price: $227.95

    Price $198.22

  9. PTFE Membrane Filters, 0.45 um, 47mm, Nonsterile, 200 per pack, SF13861 PTFE Membrane Filters, 0.45 um, 47mm, Nonsterile, 200 per pack, SF13861

    Regular Price: $170.86

    Price $151.04

  10. PTFE Membrane Filters, 0.22 um, 50mm, Nonsterile, 100 per pack, SF14684 PTFE Membrane Filters, 0.22 um, 50mm, Nonsterile, 100 per pack, SF14684

    Regular Price: $65.44

    Price $57.84

  11. PTFE Membrane Filters, 1.0 um, 90mm, Nonsterile, 100 per pack, SF13867 PTFE Membrane Filters, 1.0 um, 90mm, Nonsterile, 100 per pack, SF13867

    Regular Price: $539.82

    Price $477.22

  12. PTFE Membrane Filter, 55mm, Hydrophobic, 1.0 um, Used with EPA Method OTM 28 (Method 5 with 202), 50 per pack, SF17940 PTFE Membrane Filter, 55mm, Hydrophobic, 1.0 um, Used with EPA Method OTM 28 (Method 5 with 202), 50 per pack, SF17940

    Regular Price: $223.60

    Price $179.50

  13. PTFE Membrane Filters, 0.45 um, 142mm, Nonsterile, 50 per pack, SF15131 PTFE Membrane Filters, 0.45 um, 142mm, Nonsterile, 50 per pack, SF15131

    Regular Price: $528.44

    Price $467.14

  14. PTFE Membrane Filters, 3.00 um, 13mm, Nonsterile, 200 per pack, SF15127 PTFE Membrane Filters, 3.00 um, 13mm, Nonsterile, 200 per pack, SF15127

    Regular Price: $145.42

    Price $128.55

  15. PTFE Membrane Filters, 0.45 um, 150mm, Nonsterile, 50 per pack, SF13863 PTFE Membrane Filters, 0.45 um, 150mm, Nonsterile, 50 per pack, SF13863

    Regular Price: $528.44

    Price $467.14

  16. PTFE Membrane Filters, 5.00 um, 25mm, Nonsterile, 200 per pack, SF13870 PTFE Membrane Filters, 5.00 um, 25mm, Nonsterile, 200 per pack, SF13870

    Regular Price: $107.28

    Price $94.84

  17. PTFE Membrane Filters, 0.05 um, 260mm x 300mm, Nonsterile, 50 per pack, SF18004 PTFE Membrane Filters, 0.05 um, 260mm x 300mm, Nonsterile, 50 per pack, SF18004

    Regular Price: $777.40

    Price $676.00

  18. PTFE Membrane Filters, 5.00 um, 37mm, Nonsterile, 100 per pack, SF17382 PTFE Membrane Filters, 5.00 um, 37mm, Nonsterile, 100 per pack, SF17382

    Regular Price: $80.97

    Price $67.37

  19. PTFE Membrane Filters, 0.10 um, 142mm, Nonsterile, 25 per pack, SF18063 PTFE Membrane Filters, 0.10 um, 142mm, Nonsterile, 25 per pack, SF18063
    $291.96
  20. PTFE Membrane Filters, 0.10 um, 47mm, Nonsterile, 200 per pack, SF15120 PTFE Membrane Filters, 0.10 um, 47mm, Nonsterile, 200 per pack, SF15120

    Regular Price: $205.05

    Price $181.26

  21. PTFE Membrane Filters, 5.00 um, 50mm, Nonsterile, 100 per pack, SF14687 PTFE Membrane Filters, 5.00 um, 50mm, Nonsterile, 100 per pack, SF14687

    Regular Price: $157.31

    Price $139.06

  22. PTFE Membrane Filters, 0.22 um, 82.6mm, Nonsterile, 100 per pack, SF17162 PTFE Membrane Filters, 0.22 um, 82.6mm, Nonsterile, 100 per pack, SF17162

    Regular Price: $237.87

    Price $206.84

  23. PTFE Membrane Filters, 0.22 um, 90mm, Nonsterile, 50 per pack, SF13857 PTFE Membrane Filters, 0.22 um, 90mm, Nonsterile, 50 per pack, SF13857

    Regular Price: $173.27

    Price $150.67

  24. PTFE Membrane Filters, 0.45 um, 13mm, Nonsterile, 200 per pack, SF15125 PTFE Membrane Filters, 0.45 um, 13mm, Nonsterile, 200 per pack, SF15125

    Regular Price: $121.18

    Price $107.12

  25. PTFE Membrane Filters, 5.00 um, 142mm, Nonsterile, 50 per pack, SF15134 PTFE Membrane Filters, 5.00 um, 142mm, Nonsterile, 50 per pack, SF15134

    Regular Price: $583.19

    Price $485.21

  26. PTFE Membrane Filters, 0.45 um, 25mm, Nonsterile, 200 per pack, SF13860 PTFE Membrane Filters, 0.45 um, 25mm, Nonsterile, 200 per pack, SF13860

    Regular Price: $121.64

    Price $107.53

  27. PTFE Membrane Filters, 0.22 um, 260mm x 300mm, Nonsterile, 50 per pack, SF17385 PTFE Membrane Filters, 0.22 um, 260mm x 300mm, Nonsterile, 50 per pack, SF17385

    Regular Price: $422.12

    Price $359.42

  28. PTFE Membrane Filters, 0.05 um, 25mm, Nonsterile, 200 per pack, SF18038 PTFE Membrane Filters, 0.05 um, 25mm, Nonsterile, 200 per pack, SF18038

    Regular Price: $167.86

    Price $139.46

  29. PTFE Membrane Filters, 0.22 um, 293mm, Nonsterile, 25 per pack, SF13859 PTFE Membrane Filters, 0.22 um, 293mm, Nonsterile, 25 per pack, SF13859

    Regular Price: $567.36

    Price $501.55

  30. PTFE Membrane Filters, 1.0 um, 47mm, Nonsterile, 100 per pack, SF13866 PTFE Membrane Filters, 1.0 um, 47mm, Nonsterile, 100 per pack, SF13866

    Regular Price: $104.22

    Price $90.63

  31. PTFE Membrane Filters, 0.45 um, 50mm, Nonsterile, 100 per pack, SF14685 PTFE Membrane Filters, 0.45 um, 50mm, Nonsterile, 100 per pack, SF14685

    Regular Price: $65.44

    Price $57.84

  32. PTFE Membrane Filters, 5.00 um, 90mm, Nonsterile, 50 per pack, SF13872 PTFE Membrane Filters, 5.00 um, 90mm, Nonsterile, 50 per pack, SF13872

    Regular Price: $216.15

    Price $187.96

  33. PTFE Membrane Filters, 0.10 um, 13mm, Nonsterile, 200 per pack, SF15123 PTFE Membrane Filters, 0.10 um, 13mm, Nonsterile, 200 per pack, SF15123

    Regular Price: $145.42

    Price $128.55

  34. PTFE Membrane Filters, 1.0 um, 142mm, Nonsterile, 50 per pack, SF15132 PTFE Membrane Filters, 1.0 um, 142mm, Nonsterile, 50 per pack, SF15132

    Regular Price: $548.88

    Price $485.21

  35. PTFE Membrane Filters, 5.00 um, 13mm, Nonsterile, 200 per pack, SF15128 PTFE Membrane Filters, 5.00 um, 13mm, Nonsterile, 200 per pack, SF15128

    Regular Price: $86.39

    Price $76.37

  36. PTFE Membrane Filters, 1.0 um, 150mm, Nonsterile, 50 per pack, SF13868 PTFE Membrane Filters, 1.0 um, 150mm, Nonsterile, 50 per pack, SF13868

    Regular Price: $528.44

    Price $467.14

1–36 of 62 items