Description
Specifications Table
Product Name – Whatman Grade 0858 FF Quadrant Fold Filter Paper
Quantity/Pack Size – 185MM (Pack of 100)
Form – Folded (Quadrant)
Grade – 0858
Application – General laboratory filtration, qualitative analysis
Product Overview
Whatman Grade 0858 FF quadrant-fold filter paper is engineered for high-performance filtration in laboratory settings, offering a balance of retention efficiency and flow rate. The quadrant-fold design maximizes surface area, ensuring rapid filtration while maintaining particle retention down to 15-20 µm. Constructed from 100% pure cellulose, this filter paper is free from binders or additives, guaranteeing chemical compatibility with a wide range of solvents and aqueous solutions. Its medium-speed filtration makes it versatile for routine lab applications where both clarity and throughput are critical. The paper’s uniform porosity and consistent thickness reduce clogging, extending its usable life during repetitive procedures. Compatible with standard filtration apparatus, it integrates seamlessly into existing workflows without requiring specialized equipment. The acid-washed treatment enhances purity, minimizing interference in sensitive analytical processes. Whether used for clarifying liquids, removing precipitates, or preparing samples, this filter paper delivers reproducible results with minimal extractables. Its robust construction resists tearing under wet conditions, ensuring reliability even with viscous or particulate-laden samples. The pack of 100 sheets provides cost-effective bulk supply for high-volume labs, reducing frequent reordering needs.
FAQs
1. What is the particle retention range for Whatman Grade 0858 FF filter paper?
This filter paper retains particles in the 15-20 µm range, making it suitable for general clarification and qualitative analysis where moderate retention is required.
2. Can this filter paper be used with organic solvents?
Yes, the 100% cellulose composition is chemically compatible with most organic solvents, including alcohols, ketones, and aliphatic hydrocarbons, though compatibility should always be verified for specific applications.
3. How does the quadrant-fold design improve filtration efficiency?
The pre-folded design increases the effective surface area by four times compared to flat sheets, allowing faster flow rates while maintaining the same retention capacity per unit area.
4. Is this filter paper suitable for sterile filtration?
No, Grade 0858 FF is not rated for sterile filtration. For sterile applications, consider Whatman’s dedicated sterile-grade filters or membrane filters with 0.22 µm pore sizes.
5. What’s the difference between Grade 0858 and Grade 1 filter papers?
Grade 0858 offers a faster flow rate with slightly lower retention (15-20 µm) compared to Grade 1 (11 µm), making it better suited for applications where speed is prioritized over fine particulate capture.
