Description
Specifications Table
Product Name – Whatman Grade 44 Cellulose Filter Paper
Quantity/Pack Size – 7CM (Pack of 100), 9CM (Pack of 100), 11CM (Pack of 100), 12.5CM (Pack of 100), 15CM (Pack of 100), 18.5CM (Pack of 100), 24CM (Pack of 100)
Form – Circular sheets
Grade – 44 (Medium retention, fast flow)
Application – Qualitative analytical filtration, general lab use
Product Overview
Whatman Grade 44 Cellulose Filter Paper is engineered for superior performance in laboratory filtration applications where a balance between flow rate and particle retention is critical. Composed of 100% pure cellulose, this filter paper offers a medium retention capacity, effectively capturing fine particles while maintaining a fast flow rate to expedite filtration processes. The uniform thickness and consistent porosity ensure reliable, reproducible results across diverse experimental conditions. Its high wet strength and chemical compatibility make it suitable for a wide range of aqueous and organic solutions, providing versatility in various lab protocols. The acid-washed treatment enhances purity, minimizing potential interference in sensitive analyses. Available in multiple diameters, this filter paper adapts seamlessly to different filtration setups, from standard funnels to specialized apparatus. The smooth surface texture prevents fiber shedding, reducing contamination risks during critical procedures. Whether used in gravity or vacuum filtration, Whatman Grade 44 delivers exceptional clarity in filtrates, making it a preferred choice for applications requiring both efficiency and precision. Its robust construction ensures durability even under prolonged use, offering excellent value for high-throughput laboratories. The filter paper’s neutral pH and low extractable content further contribute to its reliability in analytical workflows where sample integrity is paramount.
FAQs
1. What is the particle retention range for Whatman Grade 44 filter paper?
Whatman Grade 44 filter paper typically retains particles in the 3-5 micron range, making it suitable for applications requiring medium retention with good flow characteristics.
2. Can this filter paper be used with organic solvents?
Yes, Whatman Grade 44 is compatible with most common organic solvents including alcohols, ketones, and aliphatic hydrocarbons, though compatibility should always be verified for specific solvent mixtures.
3. How does the flow rate compare to other Whatman grades?
The flow rate of Grade 44 is faster than high-retention grades like 42 but slower than coarse grades like 1, offering an optimal balance for many general filtration needs.
4. What’s the recommended storage method for unused filter papers?
Store in original packaging in a cool, dry environment away from direct sunlight and chemical vapors to maintain performance characteristics.
5. Are there any special handling precautions for this grade?
While generally robust, avoid touching the filtration surface with bare hands as skin oils may affect performance in sensitive applications. Use clean forceps when handling.
