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Selecting the appropriate Buchner funnel is critical for effective and efficient laboratory filtration processes. The right choice ensures optimal separation, prevents contamination, and enhances experimental accuracy. Understanding the key characteristics and applications of these essential lab tools is paramount for achieving reliable scientific results.
2 PARTS || Büchner funnel with straight sides, two interlocking parts and a perforated filter plate is made of high quality polypropylene
SEPARATION || For use in filtration (separation of solid matter and fluid) - Two parts combine forming a vacuum seal which does not require greasing
USE 11 - 12.5CM FILTER PAPER || Filtration paper required but NOT included - Best with 11 to 12.5cm filter paper - Moisten filter paper with a liquid to prevent initial leakage
MEASUREMENTS || Funnel stem measures 85mm (3.3 inches) with an inner diameter of 20mm (0.8 inches) - Fully assembled funnel measures 210mm (8.25 inches) in length with an inner diameter of 130mm (5.1 inches)
MULTIUSE || Often used in combination with a Büchner flask (CH0422C01), Büchner ring and sinter seals
This Buchner funnel filtration kit includes a handheld metal vacuum pump that speeds up filtration by creating strong negative pressure, reducing filtration time and improving efficiency for laboratory and educational applications.
The ceramic Buchner funnel features uniform pore distribution for consistent filtration results. Comes with 100 pcs 70 mm qualitative filter papers (pre-wetting recommended for a secure seal and optimal performance).
Includes 9 different size rubber stoppers to ensure tight, leak-free connections between the funnel and filtration flask, maintaining stable vacuum pressure during use.
The 500 mL borosilicate glass filtering flask offers excellent chemical resistance and thermal shock durability, allowing safe use under temperature changes while providing clear visibility of the filtration process.
This complete filtration kit includes a 500 mL vacuum flask, ceramic Buchner funnel, manual vacuum pump, 9 rubber stoppers, and 100 filter papers, ready for vacuum filtration, chemistry labs, and teaching demonstrations.
Ceramic Funnel: 100mm Buchner ceramic funnel with uniform pores delivers consistent filtration, paired with 100pcs 80mm qualitative filter papers (wetting needed for tight fit)
1000mL Filter Flask: Crafted from borosilicate glass for high clarity, with clear, easy-to-read graduations. Withstands temperatures from -100°C to 500°C, suitable for diverse lab applications
Leakproof: 9-size rubber stoppers ensure airtight connections for any laboratory flask, maintaining vacuum integrity
Vacuum Filtration Kit: This glass filtration set, when paired with a lab vacuum pump, accelerates the filtration process. It is suitable for the rapid processing of large liquid volumes, making it an essential tool for teaching labs, and scientific...
Complete Filtering Kit: It includes a 1000ml fltering flask, 100mm ceramic Buchner funnel, 9 rubber stoppers, vacuum hose, and 100 filter papers
Material: Crafted from borosilicate glass ensuring durability and resistance to thermal shock; features uniform wall thickness and high transparency with no bubbles.
Optimal Capacity: Includes a 250ml Buchner funnel and a 1000ml filter bottle, perfect for handling substantial volumes in various scientific and industrial applications.
Efficient Filtration: Designed for superb filtration without the need for filter paper, with a maximum nominal filtration size of 15-40 μm, ensuring precise and clean results.
Versatile Uses: Suitable for a wide range of applications including scientific research, the chemical industries, teaching, distillation, and soap making.
Durable Material: Made of borosilicate glass, high quality material and perfect craftsmanship, high and low temperature resistance, chemical resistance.
Capacity: 500ml and1000ml, making it an ideal choice for storing large amounts of liquid.
Connection: Erlenmeyer flask with 24/40 standard conical male connector.
Thick: The Borosilicate glass flask is made to ensure walls are thin, uniform and easy to work with. The flask is handmade with a process that ensures the walls are thick and free from air bubbles.
Efficient Filtration: Equipped with a metal vacuum hand pump, it accelerates filtration efficiently, reducing time by up to 50% with easy operation for lab and industrial use
Ceramic Funnel Set: Buchner ceramic funnel with uniform pores delivers consistent filtration, paired with 100pcs 70mm qualitative filter papers (wetting needed for tight fit)
Leakproof: 9-size rubber stoppers ensure airtight connections for any laboratory flask, maintaining vacuum integrity
Last update on 2026-07-18 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Lab Buchner Funnels
Material Considerations
Buchner funnels are commonly available in porcelain, glass, and polypropylene. Each material offers distinct advantages for specific laboratory needs:
Porcelain: Highly durable, resistant to most chemicals (except hydrofluoric acid), and excellent for high-temperature applications. Its robust nature makes it a staple in many chemistry labs.
Glass: Offers superior chemical resistance and allows for clear visual inspection of the filtration process. Borosilicate glass is preferred for its thermal shock resistance, making it suitable for a wider range of temperatures.
Polypropylene: A lightweight and shatter-resistant option, ideal for general-purpose filtration and educational settings. It is more cost-effective and resistant to a broad spectrum of chemicals, though not suitable for high-temperature use or strong organic solvents.
Size and Capacity
The size of the funnel, specifically its diameter and capacity, should align with the volume of the solution being filtered and the desired amount of solid precipitate. Funnels range from small benchtop models to larger industrial-grade units. Consider the following:
Diameter: The top diameter dictates the size of filter paper that can be used effectively. Ensure the chosen funnel can accommodate standard filter paper sizes available in your lab.
Stem Length/Diameter: A longer, wider stem can facilitate faster drainage, which is important for quick filtration processes.
Overall Capacity: Match the funnel's capacity to the typical experimental volumes to avoid overflow or requiring multiple filtration steps.
Filtration Performance and Compatibility
The design of the funnel significantly impacts filtration efficiency, especially when used with vacuum assistance. Key features to evaluate include:
Perforated Plate: The design and number of perforations on the internal plate support the filter paper and allow for even liquid flow. A well-designed plate prevents filter paper tearing under vacuum.
Side Arm/Vacuum Port: For vacuum filtration, a sturdy side arm with a compatible hose barb is essential for connecting to a vacuum pump or aspirator. Ensure the connection is airtight and robust enough to withstand constant vacuum pressure.
Filter Paper Compatibility: Always verify that the funnel's perforated plate diameter is suitable for standard circular filter papers. The correct fit minimizes bypass and ensures efficient separation.
Frequently Asked Questions
What is a Buchner funnel primarily used for in a lab?
These funnels are primarily used in laboratories for vacuum filtration, a process that separates solids from liquids. By creating a vacuum below the filter paper, the liquid is drawn through more quickly, leaving the solid residue behind.
How do you properly set up a Buchner funnel for filtration?
To set up, place a piece of filter paper that fits snugly over the perforated plate inside the funnel. Moisten the paper with a small amount of the solvent used in the solution to be filtered, then connect the funnel's side arm to a vacuum source using thick-walled tubing.
What are the advantages of using a porcelain funnel over a glass one?
Porcelain funnels are highly durable and resistant to breakage, making them a robust choice for general lab work. They also handle high temperatures well, making them suitable for filtering hot solutions where glass might be at risk of thermal shock.
How do I choose the correct size of funnel for my experiment?
The correct size depends on the volume of the solution you need to filter and the amount of solid precipitate expected. Choose a funnel whose diameter allows the filter paper to cover the entire perforated plate without extending too far up the sides.
What is the best way to clean these funnels after use?
After use, immediately rinse the funnel with an appropriate solvent to remove any residue. For most applications, warm soapy water followed by a thorough rinse with distilled water is sufficient, ensuring all parts are completely dry before storage.
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