Your Cart (0)
Thumbnail Filmstrip of Glass Fiber Filter Discs, 0.7um, 21mm, Binder-Free, Slow Flow, Nonsterile, 100/Pk Images
Featuring a pure borosilicate glass fiber depth medium manufactured without binders, these 21mm filter discs deliver fine particle retention with high loading capacity for demanding laboratory clarification and prefiltration. The hydrophilic media carries a 0.7um nominal retention rating and a 0.45mm (450um) thickness, providing a slow-flow profile that captures very fine particulates while protecting downstream membranes. Each box contains 100 discs supplied nonsterile.
Key Glass Fiber Media Characteristics
- Composed of 100% borosilicate glass fiber with no binders, avoiding binder extractables during solvent filtration and gravimetric analysis
- Naturally hydrophilic depth structure provides high impurity retention capacity combined with low filter resistance
- 0.7um nominal particle retention captures very fine particulates from aqueous and solvent samples
- High particulate loading capacity makes the media well suited as a prefilter ahead of finer membranes
- Biologically inert and resistant to oxidizing agents and weak acids
Key Construction Characteristics
- Disc format, 21mm diameter for use in compatible filter holders
- Nominal media thickness of 0.45mm (450um) for added dirt-holding capacity
- Slow-flow grade for fine retention applications
- Supplied nonsterile, 100 discs per box
The depth structure delivers consistent flow and dependable particle capture across high-particulate samples, helping maintain sample integrity throughout filtration. The binder-free borosilicate composition keeps extractables low, supporting reliable analytical and gravimetric results.
- Color
- White
- Diameter
- 21mm
- Flow Speed
- Slow
- Grade
- DSLFF
- Material
- Glass Fiber (GF)
- Membrane Thickness (µm)
- 450
- Mesh Format
- Disc
- Nominal Thickness (µm)
- 450
- Pack Count
- 100
- Particle Retention
- 0.7
- Pore Size (µm)
- 0.7
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Sample Prefiltration Protects finer downstream membranes by capturing high loads of fine particulates from heavily contaminated liquids.
- HPLC Sample Preparation Clarifies samples and solvents prior to chromatography to help ensure successful analysis.
- Aqueous Clarification Removes fine suspended particulates from aqueous solutions for clearer filtrate.
- Gravimetric Analysis Binder-free borosilicate construction avoids binder extractables for accurate gravimetric determinations.
- Suspended Solids Analysis Captures fine suspended solids in water and industrial waste samples.
- Protein and Cell Culture Filtration Suitable for biochemical clarifications, protein filtrations, and cell culture sample preparation.