125 mm Black Dot Quantitative Filter Paper Discs / Grade 388

These 125 mm diameter fast filtering, black dot filter paper discs are used for quantitative and gravimetric analyses as well as for pressure or vacuum filtration. They are made out of 100 % cotton linters with an α-cellulose content of > 98 % and are acid-washed to make the papers ashless and achieve high purity.

Product Code: FT-3-101-125

Description

• High Chemical Purity: Made from 100% cotton linters with an alpha-cellulose content exceeding 98%.
• Ashless Quality: Guaranteed ash content of ≤ 0.01% (conforming to DIN 54370), ensuring no unwanted residue interferes with precise gravimetric analysis.
• Acid-Washed: Treated with acid to remove trace elements, making it ideal for highly sensitive quantitative chemistry.
• Fast Flow Rate: Classified as a “Black Dot” (wide-pore) grade, offering rapid filtration for quick fluid processing.
• Coarse Particle Retention: Optimized for capturing coarse, bulky, or gelatinous precipitates (such as iron hydroxide, aluminum hydroxide, or bismuth hydroxide).
• Wet-Strengthened: Formulated to maintain stable physical integrity under vacuum or pressure filtration without tearing.

Additional information

Application Area	Analytical sample preparation
Filter Diameter	⌀ 125 mm
Filter Format	Discs
Filter Paper/Membrane Color	White
Filtration Time	10 s
Grade	388
Specifications	Wide-pore, loose structure, fast filtering
Thickness	0.21 mm
Filter Material	100 % Cotton Linters (> 98 % alpha-cellulose; ash-free)
Precipitations	Coarse crystalline
Retention Rate	12–15 µm
Filter Type	Quantitative Filter Papers
Pack Size	100
Packaging	Non-sterile, bulk packed
Basis Weight	84 g/m²

Available Downloads

📥 Quantitative Filter Paper Discs