Reliable particle separation is a fundamental requirement for routine laboratory analysis and clarifying liquids. LabFriend provides an extensive range of qualitative filter paper, located within the filtration section of our distillation, separation, and filtration department. These professional-grade cellulose filters are engineered for various filtration speeds and retention levels to suit diverse analytical workflows.
Why Choose Professional Qualitative Filter Paper?
Our curated collection of filter media is designed for high purity, consistent flow rates, and mechanical strength when wet:
- Standard Filter Circles: We stock Macherey-Nagel (MN 616) Filter Paper Circles and Hahnemühle Grade 595 circles, the industry standards for general-purpose laboratory filtration.
- Time-Saving Folded Filters: Utilize LLG Folded Filters (70 mm to 240 mm) and Hahnemühle Folded Filters, which eliminate the need for manual quadrant folding and provide increased surface area for faster throughput.
- Specialized Slow Filtration: Explore Hahnemühle Grade 551 Black Ribbon circles, specifically designed for slow filtration of very fine precipitates.
- Versatile Sizing: Our range includes various diameters, from 70 mm to large 240 mm formats, ensuring a perfect fit for any laboratory funnel.
LabFriend supplies qualitative filter paper from the world's most respected names in separation science:
- Macherey-Nagel: German experts in filtration, providing the reliable MN 616 series for routine clarifying and analytical tasks.
- Hahnemühle: Renowned for high-purity cellulose products, offering a complete range of circles and ready-to-use folded filters like the Grade 595 series.
- LLG Labware: Provides high-quality, cost-effective folded filters in various sizes for efficient daily laboratory operations.
- Sartorius: A global leader in laboratory technology, offering premium filtration solutions for critical analytical applications.
A high-quality filter paper is the key to clear results; to further complete your laboratory filtration or synthesis assembly, we recommend exploring these related categories:
- In-Line Filters: Use Sartorius air filtration units to protect your vacuum lines during suction filtration procedures.
- Microfilter Plates: For high-throughput liquid sample preparation, explore AHN Biotechnologie 96-well plates.
- Gas Wash Bottles: Purify gases using Lenz-Laborglas Drechsel bottles before or after liquid filtration steps.
- Distillation Accessories: Ensure stable internal environments using J.P. Pöllath boiling stones during subsequent evaporation steps.
Unsure if a medium-fast MN 616 or a slow Hahnemühle 551 filter is better for your precipitate size? Our team provides local technical support to help you find the perfect separation solution with fast shipping and competitive pricing.
Frequently Asked Questions
1. What is qualitative filter paper used for?
It is used for identifying substances and clarifying liquids. Unlike quantitative paper, it is not primarily intended for gravimetric analysis (measuring the mass of the precipitate), but for routine separations.
2. What is the benefit of using folded filters?
Folded filters, such as those from LLG or Hahnemühle, provide a larger surface area than simple circles. This leads to a significantly higher flow rate and saves time during routine lab work.
3. What does "Black Ribbon" mean in filter paper?
"Black Ribbon" is a common industry term for very slow-filtering paper, such as Hahnemühle Grade 551, which is optimized for retaining extremely fine particles.
4. How do I choose the correct diameter?
The filter paper diameter should be chosen based on the size of the funnel being used. The paper should ideally sit just below the rim of the funnel to prevent liquid from bypassing the filter.
