Thermo Scientific™ Nalgene™ Water Quality Membrane Available on GSA/VA Contract for Federal Government customers only.

Cellulose nitrate membrane filters have official certification for water quality work

Manufacturer: Thermo Scientific™ DS02054045

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Catalog No. 09-740-21

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    Diameter (English) 1.85 in.
    Diameter (Metric) 4.7cm
    Pore Size 0.45μm
    Color (Overall) White
    Product Type Membrane
    Color Code White

    Manufactured for the bacteriological analysis of potable, waste and natural waters in accordance with the membrane filtration procedures referenced in Standard Methods for the Examination of Water and Wastewater, current edition.

    • Filters and ink are nontoxic, free of bacterial growth inhibiting or stimulating substances
    • White with green grid and sterile
    • Membranes wet uniformly within 15 seconds with no dry spots when floated on reagent grade water
    • Filter diameter is 47mm; mean pore diameter is 0.45 µm
    • Membrane flow is 55 ml/min/cm2 at 25°C, differential pressure of 93kPa
    • pH of filtrate: ≤7.5
    • Recovery using Escherichia coli met or exceeded 90% in comparison to a pour plate

  • Description & Specifications

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