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185 mm Blue Dot Quantitative Folded Filter Papers / Grade 391

These 185 mm diameter very slow filtering, blue dot folded filter papers 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.

Item no.:  FT-4-104-185

Price:  $83.00

Availability (ex works):  For more information please log in

100 Pieces
   

  • Made of 100 % cotton linters
  • Ash-free (ash content ≤ 0.01 % according to DIN 54370)
  • Wet-strengthened
  • Color-coded box for easy selection
  • Very slow filtering
  • Fine-pore
  • 100 folded filters per pack

Brochure

Carte da filtro per il laboratorio e l’industria
it 6.3 MB
Filter Papers for the Laboratory and Industry
en 6.4 MB
Papiers filtres pour les laboratoires et l’industrie
fr 6.3 MB
宣传手册:实验室过滤产品精简目录
zh 19.0 MB

Catalog

Laboratory Filtration Products
en 8.2 MB

Applications

  • Application Area
    • Analytical Sample Preparation
    • Particle Analysis
    • Clarification

Dimensions

  • Filter Diameter
    ⌀ 185 mm
  • Thickness
    0.15 mm

Features

  • Color-coded Dot
    Blue dot: Very slow filtering, fine-pore, very dense, ash-free, wet-strengthened

General Specifications

  • Filter Format
    Folded
  • Filter Paper/Membrane Color
    White
  • Filtration Time
    180 s
  • Specifications
    Fine-pore, dense, very slow filtering

Materials of Construction

  • Filter Material
    100 % Cotton Linters (> 98 % alpha-cellulose; ash-free)

Physicochemical Information

  • Grade
    391
  • Precipitations
    Very fine crystalline
  • Retention Rate
    2–3 µm

Product Information

  • Filter Type
    Quantitative Filter Papers
  • Pack Size
    100
  • Packaging
    Non-sterile, bulk packed
  • Primary Product Type
    Filters

Weights

  • Basis Weight
    84 g/m²
  • Weight
    84 g/m²