Description
Specifications Table
Product Name – Whatman Grade 072 Cellulose Filter Paper
Quantity/Pack Size – 4.7CM (Pack of 100), 5CM (Pack of 100), 5.5CM (Pack of 100)
Form – Circular sheets
Grade – 072 (Medium retention, 2.5 m)
Application – General filtration, air monitoring, gravimetric analysis
Product Overview
Whatman Grade 072 cellulose filter paper is engineered for reliable medium-retention filtration, offering consistent performance in laboratory applications requiring 2.5?m particle retention. Manufactured from high-purity cellulose fibers, this filter paper ensures minimal extractables and superior chemical resistance, making it suitable for both aqueous and organic solvent-based filtrations. The uniform pore structure guarantees even flow rates and efficient particle capture, while its robust construction prevents tearing during handling or under vacuum pressure. Designed for compatibility with standard filtration apparatus, Grade 072 maintains dimensional stability across a wide pH range (0-14), ensuring reproducible results in critical procedures. Its low ash content (<0.06%) further enhances accuracy in gravimetric analyses where residue weight is a determining factor. The filter paper?s smooth surface minimizes fiber shedding, reducing contamination risks in sensitive applications. Available in three practical diameters (4.7cm, 5cm, and 5.5cm), this pack of 100 sheets provides cost-effective bulk supply for high-throughput laboratories. The acid-washed treatment removes trace metals and impurities, while the medium retention balance makes it versatile for routine clarifications, sample preparations, and environmental monitoring. Its consistent performance across batches is backed by Whatman?s rigorous quality control, ensuring compliance with international laboratory standards.
FAQs
1. What is the particle retention capacity of Whatman Grade 072 filter paper?
This filter paper retains approximately 90% of particles sized 2.5 micrometers and larger, making it suitable for medium-retention applications where fine particulate removal is required without excessive flow restriction.
2. Can this filter paper be used with organic solvents?
The cellulose composition provides good chemical compatibility with most organic solvents including alcohols, hydrocarbons, and mild acids, though prolonged exposure to strong oxidizing agents may degrade the fibers over time.
3. How does the flow rate compare to other Whatman grades?
Grade 072 offers a moderate flow rate that balances between faster-flowing grades like 042 and slower high-retention grades like 044, providing efficient filtration without premature clogging in most standard applications.
4. What storage conditions are recommended to maintain performance?
Store in a cool, dry environment away from direct sunlight and chemical vapors. Keep the original packaging sealed when not in use to prevent moisture absorption which could alter filtration characteristics.
5. Is this filter paper suitable for sterilization procedures?
While the paper can withstand autoclaving at 121?C for typical sterilization cycles, its cellulose composition limits it to single-use applications as repeated sterilization may compromise structural integrity and filtration efficiency.
