Grade D Glass Fiber Filter Paper 2.7 um, 90mm, Nonsterile, 15/Pk SKU: EF19059

Glass Fiber (GF) Filter Paper - EF19059

Vacuum filtration of turbid environmental samples requires a depth filter that maintains flow rates through heavy particulate loads without premature blinding. High void volume between randomly packed glass fibers sustains rapid flow rates even as particulate loading accumulates during filtration. In practice, from fiber selection through final inspection, the manufacturing process ensures every sheet meets the performance specifications of its grade.

Key Filter Paper Characteristics

• Hydrophilic glass fiber wets spontaneously on contact with aqueous solutions, eliminating pre-wetting steps required by hydrophobic filter media.
• Nominal retention ratings defined by fiber diameter and packing density provide consistent particle capture across production lots.
• Chemically inert glass composition withstands acids, bases, and organic solvents across the full pH range without fiber degradation.
• Pure borosilicate glass construction eliminates organic extractables that could interfere with downstream chromatographic or spectroscopic analysis.
• Borosilicate glass microfiber depth structure provides high particle loading capacity with flow rates significantly faster than cellulose papers of equivalent retention.

Whether your method requires simple clarification or precise gravimetric determination, the documented specifications above define what this paper delivers. Under these conditions, chemical inertness across the full pH range means this filter handles the same aggressive sample matrices your analytical membranes process. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Capacity

7mL

Diameter

90mm

Folded/ Fluted/ Pleated

No

Grade

D

Material

Glass Fiber (GF)

Nominal Basis Weight (g/ m²)

121g/m²

Pack Count

15

Particle Retention

2.7um

Pore Size (µm)

2.7

Sterility

Nonsterile

Weight

0.13

Wettability

Hydrophobic

• Water Quality Monitoring - Collects suspended solids from environmental water samples for regulatory compliance and watershed assessment.
• Stack Emissions Testing - High temperature tolerance supports gravimetric particulate determination from industrial emission source sampling.
• Scintillation Counting - Binderless glass fiber provides the chemically clean substrate liquid scintillation counting methods require.
• Membrane Prefiltration - Removes coarse debris from turbid samples before downstream membrane analysis to prevent premature blinding.
• Chlorophyll Extraction - Concentrates algal cells from water column samples for chlorophyll measurement in aquatic quality assessment.
• Protein Precipitation - Captures precipitated proteins from biological fluids for downstream immunoassay and biochemical characterization.