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  • Cellulose Extraction Thimbles

    Cellulose Filters

    Johnson Test Papers offers an extensive range of cellulose extraction thimbles. They are available in a variety of dimensions and wall thicknesses for optimisation of retention, rigidity and wet or dry strength. Our thimbles are known for their purity and consistent high quality - made with 100% pure cotton linters fibres They are neutral and fat free and offer high mechanical strength and excellent retention capacity. Cellulose extraction 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 extraction systems but are widely used in Soxhlet extraction units and provide a safe, convenient and efficient method of extraction. 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
    Dimensions ⵁ x H: Ø 16 x 100 mm Product code: 816100
    Dimensions ⵁ x H: Ø 19 x 90 mm Product code: 81990
    Dimensions ⵁ x H: Ø 20 x 100 mm Product code: 820100
    Dimensions ⵁ x H: Ø 20 x 80 mm Product code: 82080
    Dimensions ⵁ x H: Ø 22 x 100 mm Product code: 822100
    Dimensions ⵁ x H: Ø 22 x 120 mm Product code: 822120
    Dimensions ⵁ x H: Ø 22 x 60 mm Product code: 82260
    Dimensions ⵁ x H: Ø 22 x 80 mm Product code: 82260
    Dimensions ⵁ x H: Ø 22 x 85 mm Product code: 82285
    Dimensions ⵁ x H: Ø 23 x 100 mm Product code: 823100
    Dimensions ⵁ x H: Ø 23 x 80 mm Product code: 82380
    Dimensions ⵁ x H: Ø 25 x 100mm Product code: 825100
    Dimensions ⵁ x H: Ø 25 x 150 mm Product code: 825150
    Dimensions ⵁ x H: Ø 25 x 60mm Product code: 82560
    Dimensions ⵁ x H: Ø 25 x 70mm Product code: 82570
    Dimensions ⵁ x H: Ø 25 x 80mm Product code: 82580
    Dimensions ⵁ x H: Ø 26 x 100 mm Product code: 826100
    Dimensions ⵁ x H: Ø 26 x 50 mm Product code: 82650
    Dimensions ⵁ x H: Ø 26 x 60 mm Product code: 82660
    Dimensions ⵁ x H: Ø 26 x 80 mm Product code: 82680
    Dimensions ⵁ x H: Ø 27 x 100 mm Product code: 827100
    Dimensions ⵁ x H: Ø 28 x 100 mm Product code: 828100
    Dimensions ⵁ x H: Ø 28 x 120 mm Product code: 828120
    Dimensions ⵁ x H: Ø 28 x 80mm Product code: 28880
    Dimensions ⵁ x H: Ø 30 x 100 mm Product code: 830100
    Dimensions ⵁ x H: Ø 30 x 150mm Product code: 830150
    Dimensions ⵁ x H: Ø 30 x 60mm Product code: 83060
    Dimensions ⵁ x H: Ø 30 x 77 mm Product code: 83077
    Dimensions ⵁ x H: Ø 30 x 80 mm Product code: 83080
    Dimensions ⵁ x H: Ø 30 x 90mm Product code: 83090
    Dimensions ⵁ x H: Ø 33 x 100 mm Product code: 833100
    Dimensions ⵁ x H: Ø 33 x 118 mm Product code: 833118
    Dimensions ⵁ x H: Ø 33 x 150 mm Product code: 833150
    Dimensions ⵁ x H: Ø 33 x 205 mm Product code: 833205
    Dimensions ⵁ x H: Ø 33 x 60 mm Product code: 83360
    Dimensions ⵁ x H: Ø 33 x 80 mm Product code: 83380
    Dimensions ⵁ x H: Ø 33 x 94 mm Product code: 83394
    Dimensions ⵁ x H: Ø 34 x 130 mm Product code: 834130
    Dimensions ⵁ x H: Ø 35 x 150 mm Product code: 835150
    Dimensions ⵁ x H: Ø 37 x 130 mm Product code: 837130
    Dimensions ⵁ x H: Ø 40 x 85 mm Product code: 84085
    Dimensions ⵁ x H: Ø 41 x 123 mm Product code: 841123
    Dimensions ⵁ x H: Ø 43 x 123 mm Product code: 843123
    Dimensions ⵁ x H: Ø 43 x 125 mm Product code: 843125
    Dimensions ⵁ x H: Ø 80 x 95 mm Product code: 83095