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Application of Tangential Flow Filtration (TFF)

May 08,2026 Product knowledge By: Nabu Fluid

Application Scenario


In organic synthesis and enzyme-catalyzed reactions, rapidly remove small molecule by-products (such as salts and inhibitors) and recover target products (such as peptides and oligonucleotides).


Operation Procedure

      1. Membrane Cassette Selection
      Choose 1~10 kDa ultrafiltration membrane cassettes (e.g., Pall Omega™) according to the molecular weight of target products.
      2. Circulatory Dialysis
      Pump the reaction mixture into the TFF system, and continuously add pure water or fresh buffer solution to displace small molecular impurities.
      3. Endpoint Detection
       Monitor impurity removal efficiency via HPLC or conductivity measurement.

Advantages

  •     Over 10 times faster than traditional dialysis bag method, and capable of processing large-volume samples up to 500 mL.

  •     Avoid the drawbacks of gel filtration chromatography, including high cost of column packing and long processing time.

Precautions

  •     Organic solvents may corrode common membrane materials; solvent-resistant PVDF membrane cassettes are recommended.

  •     High-concentration products are prone to concentration polarization. It is recommended to pause the system intermittently and stir the feed solution.

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