Glass Fiber Syringe Filters Membrane Discs, 0.7um, 47mm, Binder Free, Nonsterile, 100/Pk
GVS SKU: 1215540

Featuring a binder-free borosilicate glass fiber depth medium, these 47mm membrane discs deliver a 0.7um nominal particle retention without any bonding resin to introduce extractables into the sample. The fibers are woven into a porous matrix that captures particulates throughout the depth of the medium, making the discs well suited to heavily loaded samples and to gravimetric and analytical determinations where binder migration cannot be tolerated.

Key Glass Fiber Media Characteristics

• Naturally hydrophilic borosilicate glass fiber medium with a 0.7um nominal particle retention for fine-particulate capture at high flow.
• Binder-free (binderless) construction avoids resin extractables during solvent filtration and gravimetric analysis.
• Depth structure provides high dirt-handling capacity, ideal for prefiltration of heavily loaded samples.
• Biologically inert and autoclavable, with high resistance to oxidizing agents and weak acids.
• Extends the life of downstream final membranes by trapping large particles upstream.

Key Construction Characteristics

• Material: borosilicate glass fiber, binder free.
• Diameter: 47mm flat disc format.
• Nominal thickness: 0.45mm.
• Sterility: Nonsterile.
• Pack: 100 discs per pack.

These discs maintain consistent retention and fast flow across demanding particulate loads, protecting downstream membranes and reducing the frequency and cost of final-filter replacement. The absence of a resin binder preserves sample integrity in gravimetric and analytical workflows where extractables would compromise results.

Color

White

Diameter

47mm

Material

Glass Fiber (GF)

Maximum Operating Temperature (°C)

165

Membrane Thickness (µm)

450

Pack Count

100

Pore Size (µm)

0.7

Prefilter (Yes/No)

Yes

Sterility

Nonsterile

Wettability

Hydrophilic

• Gravimetric Analysis Binder-free construction avoids resin extractables, supporting accurate weight-based determinations.
• Solvent Filtration The borosilicate medium resists solvents and avoids binder migration during sample preparation.
• Prefiltration High dirt-handling depth medium traps large particles to protect and extend the life of downstream final membranes.
• Sample Clarification The 0.7um nominal retention provides a low-cost clarification step for heavily loaded samples.
• Environmental Sample Prep Suited to water, air pollution, and wastewater contamination analyses requiring inert, low-extractable media.
• Protein Precipitate Collection The fine glass fiber matrix captures fine precipitates and particulates from biological samples.