Description

Specifications Table

Product Name – Whatman Grade 1575 Cellulose Filter Paper
Quantity/Pack Size – 200MM (Pack of 100)
Form – Circular Sheets
Grade – 1575 (Medium Flow, High Wet Strength)
Application – General Filtration, Gravimetric Analysis, Sample Prep

Product Overview

Whatman Grade 1575 cellulose filter paper is engineered for demanding laboratory filtration tasks where both speed and durability are essential. Composed of 100% pure cellulose fibers, this medium-flow filter paper delivers consistent performance with a balanced retention capacity, making it suitable for a wide range of aqueous and organic solutions. Its high wet strength ensures structural integrity even under prolonged filtration, while the smooth surface minimizes particle retention for cleaner results. The 200mm diameter provides ample surface area for efficient processing of larger sample volumes. Unlike standard filter papers, Grade 1575 undergoes rigorous quality control to eliminate extractables that could interfere with sensitive analyses. Its chemical compatibility extends to mild acids, alkalis, and organic solvents, though it is not recommended for strong oxidizing agents. The uniform porosity and thickness distribution guarantee reproducible results across batches, a critical factor for quantitative applications. This filter paper is particularly valued in environments where both filtration speed and mechanical resilience are required, such as in environmental testing or industrial quality control. The pack of 100 sheets offers cost-effective bulk supply for frequent users, with each sheet pre-cut for immediate use without additional preparation.

FAQs

1. What is the particle retention range for Whatman Grade 1575 filter paper?

This grade typically retains particles in the 4-7 micron range under standard conditions, though retention can vary slightly depending on the specific application and solution viscosity.

2. Can this filter paper be used with autoclave sterilization?

While Grade 1575 can withstand autoclaving at 121°C for typical cycles, repeated sterilization may compromise its structural integrity over time. For frequent autoclaving, consider pre-sterilized alternatives.

3. How does Grade 1575 compare to Whatman Grade 42 in terms of flow rate?

Grade 1575 offers a significantly faster flow rate than Grade 42 due to its larger pore size and optimized fiber composition, making it more suitable for applications where filtration speed is prioritized over fine particle retention.

4. What storage conditions are recommended to maintain the filter paper’s performance?

Store in a cool, dry environment (15-25°C, 30-50% humidity) in its original packaging to prevent moisture absorption or contamination. Avoid exposure to direct sunlight or volatile chemicals.

5. Is this filter paper compatible with HPLC sample preparation?

While Grade 1575 can be used for preliminary sample cleanup, it is not specifically designed for HPLC applications. For HPLC sample prep, consider dedicated syringe filters or membrane filters with lower extractable levels.