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Cellulose Extraction Thimbles

Cellulose Filters

Johnson Test Papers offers an extensive range of Whatman cellulose extraction thimbles. They are available in a variety of dimensions and wall thicknesses for optimization of retention, rigidity, and wet or dry strength. Our thimbles are known for their purity and consistent high quality - made with 100% high pure cotton linters fibres They are neutral and fat free and offer high mechanical strength and excellent retention capacity. Cellulose thimbles are high quality sample reservoirs for quality control, research and analytical applications, where solvent extraction of solids and semi-solids must be carried out. They are suitable for all extractors systems but are widely used in Soxhlet extraction units and provide a safe, convenient and efficient method of solvent extraction of semi-solids and solids. Soxhlet extraction is a technique widely used for analysis of fats and pesticides in food and soil specimens and in many other procedures that involve a solid-liquid extraction. It provides a safe method of extraction with toxic and other noxious solvents. Our thimbles are also used in air and waste gas analysis especially in cold stack air monitoring for collecting solid particles (dust).

The high purity of the material gives reliable and reproducible analytical results. We offer you thimbles with very accurate dimensions for use in automatic extraction systems. The dimensions are matched exactly to those of the thimble holders to ensure optimum fit. We also offer cellulose thimbles specifically sized for all automated extraction apparatus currently available on the market. Thimble walls are approximately 1.5mm thick and have been found to perform satisfactorily in applications requiring either a single or double wall thickness.

    Tolerances
  • Internal diameter: +0/-0.5mm
  • External Height: ± 1mm
  • Wall Thickness: 1.5mm ± 0.5mm
  • Ash Content: < 0.1 %

Key Features

  • Produced from high
  • quality alpha cellulose cotton linter
  • Excellent mechanical strength and retention
  • High purity of the materials ensures reliable and reproducible analytical results
  • Variety of sizes and wall thicknesses manufactured to precise dimensions to suit your application, Ø × L (mm)
  • reproducible high quality
  • made of selected raw material
  • monitored size accuracy
  • Designed to fit most commercially available Soxhlet extractors

Applications

  • Extraction of sulfur in gaseous masses
  • Determination by extraction of the content of free lipids (fat) in the food and pharmaceutical industry
  • Determination of dust and tar in industrial air and gases
  • Lacquer and binder analysis in paint colours.
  • Control of emission smokes in industrial chimneys
  • Gravimetric Analysis of dust in gases
  • Analysis of toxic substances in toys
  • Extraction of polycyclic aromatic hydrocarbons
  • Determination of pesticides in food and soil samples
  • Analysis of lacquer and binder in paints
  • Vitamin A and carotene extraction
  • Quality management of components used in pharmaceutical formulations
  • Extraction of sulfur in gaseous masses
  • Extraction and quantification of components in industrial products
  • Dimensions of dust in air or industrial gases
Available Sizes
Dimensions ⵁ x H Product Code
Ø 16 x 100 mm 816100
Ø 19 x 90 mm 81990
Ø 20 x 100 mm 820100
Ø 20 x 80 mm 82080
Ø 22 x 100 mm 822100
Ø 22 x 120 mm 822120
Ø 22 x 60 mm 82260
Ø 22 x 80 mm 82260
Ø 22 x 85 mm 82285
Ø 23 x 100 mm 823100
Ø 23 x 80 mm 82380
Ø 25 x 100mm 825100
Ø 25 x 150 mm 825150
Ø 25 x 60mm 82560
Ø 25 x 70mm 82570
Ø 25 x 80mm 82580
Ø 26 x 100 mm 826100
Ø 26 x 50 mm 82650
Ø 26 x 60 mm 82660
Ø 26 x 80 mm 82680
Ø 27 x 100 mm 827100
Ø 28 x 100 mm 828100
Ø 28 x 120 mm 828120
Ø 28 x 80mm 28880
Ø 30 x 100 mm 830100
Ø 30 x 150mm 830150
Ø 30 x 60mm 83060
Ø 30 x 77 mm 83077
Ø 30 x 80 mm 83080
Ø 30 x 90mm 83090
Ø 33 x 100 mm 833100
Ø 33 x 118 mm 833118
Ø 33 x 150 mm 833150
Ø 33 x 205 mm 833205
Ø 33 x 60 mm 83360
Ø 33 x 80 mm 83380
Ø 33 x 94 mm 83394
Ø 34 x 130 mm 834130
Ø 35 x 150 mm 835150
Ø 37 x 130 mm 837130
Ø 40 x 85 mm 84085
Ø 41 x 123 mm 841123
Ø 43 x 123 mm 843123
Ø 43 x 125 mm 843125
Ø 80 x 95 mm 83095