Filter Paper
Filter paper is used to separate solids from liquids in laboratory filtration processes. Available in various types and formats, it is suited for diverse laboratory applications.
Product
Filter Paper
Filter paper is used to separate solids from liquids in laboratory filtration processes. Available in various types and formats, it is suited for diverse laboratory applications.
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Milian SA
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Guide and selection support
Filter paper is commonly used in laboratories for filtration tasks such as removing particles from liquids or preparing samples. Choosing the right filter paper depends on parameters like basis weight, pore size, and chemical resistance to meet process requirements. LabFinder simplifies targeted sourcing by clearly categorizing and offering relevant filter paper variants tailored to various laboratory needs.
Use and benefits
Filter paper is an essential laboratory consumable for separating solids from liquids in suspensions, solutions, or during sample preparation. By retaining particles while allowing liquid to pass through, it facilitates effective particle filtration. Filter paper is often used ahead of other filter types, such as membrane filters, or as a support or pre-filter in chromatographic methods.
Selection criteria
Selecting suitable filter paper involves considering parameters such as basis weight (g/m²), pore size or filtration grade, chemical resistance, and the desired format (round, square, or rolls). Ash-free and high-purity options are important where sample residues must be minimized. The application environment, including solvent type and temperature, also impacts the choice.
Variants and measurement principles
Filter papers come in a variety of qualities, including absorbent, high-purity, and ash-free options. Common shapes include circular filters, square filters, and filter paper rolls for custom cutting. Most filter papers are made from cellulose, with modifications available for special requirements.
Quality, storage and handling
Filter paper should be stored dry and free from dust to maintain optimal filtration performance. High-quality filter papers offer uniform pore distribution and defined surface properties, ensuring reproducible laboratory results.
Application limits
Filter paper is unsuitable for sterile filtration, viscous or highly aggressive media. For such purposes, membrane filters or sterile filtration units are required. Filter papers are also less mechanically robust and are not suitable for high-pressure applications.
Search terms and related terms
Filter paper, laboratory filter paper, analytical filter paper, round filter paper, square filter paper, ash-free filter paper, chemical filter paper, filter paper roll, fine filter paper, filtration paper, absorbent filter paper.
Also known as
absorbent filter paper
analytical filter paper
ash-free filter paper
chemical filter paper
filter paper roll
filtration paper
fine filter paper
laboratory filter paper
round filter paper
square filter paper
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Frequently asked questions
How does filter paper work in the laboratory?
Filter paper separates solids from liquids by trapping particles while allowing the clear liquid to pass. It is frequently used for sample preparation and suspension separation.
What types of filter paper are available?
Types include round, square, and roll formats, as well as specialty papers such as ash-free or absorbent variants for different laboratory tasks.
What should be considered when selecting filter paper?
Key factors include pore size, basis weight, chemical resistance, and the appropriate format to match the filtration task and device.
Can filter paper be used for sterile filtration?
Filter paper is not suitable for sterile filtration. Sterile filtration requires dedicated membrane filters or sterile filtration units.
How do pore size and basis weight influence filter performance?
Smaller pore sizes retain finer particles, while basis weight affects the stability and efficiency of filtration. The combination of both determines the filter's properties.
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