- 17×33 – 95×250 mm (30+ sizes)
- Max 120°C
- 8 µm pore size
- 25 pcs/pack
- Fat, Pesticide, PCB, Dioxin Extraction
Availability: In Stock
Cellulose Extraction Thimbles
Description
What Are Cellulose Extraction Thimbles?
Extraction thimbles are cylindrical filter cartridges used in Soxhlet and similar extraction systems. Hawach cellulose extraction thimbles (also known as Soxhlet thimbles or cellulose extraction cartridges) are manufactured from high‑purity alpha cellulose without any binders. They are designed to hold solid samples while solvents percolate through, extracting target analytes such as fats, oils, pesticides, PCBs, and dioxins. With a nominal pore size of 8 µm and a maximum temperature of 120 °C, these thimbles offer excellent mechanical strength and consistent performance for routine analytical extractions.
Cellulose vs Glass Fiber Extraction Thimbles – Which to Choose?
| Feature | Cellulose Thimbles (Hawach) | Glass Fiber Thimbles |
|---|---|---|
| Max temperature | 120°C (248°F) – routine organic solvents | 500°C – high‑temp & acidic gases |
| Chemical resistance | Good with organic solvents, oils, fats; degraded by strong acids | Excellent with most acids (except HF); limited alkali |
| Pore size | 8 µm (nominal) | 0.8 µm |
| Typical applications | Fat determination, pesticide residues, PCBs, dioxins, animal feed | High‑temp Soxhlet, acidic gas sampling, gravimetric analysis |
| Cost | Lower, economical for routine use | Higher |
| Best for | Routine fat, oil, pesticide extraction at ≤120°C | High‑temperature, acidic, or low‑background applications |
Choose cellulose thimbles for routine Soxhlet extractions up to 120°C. Choose glass fiber thimbles for higher temperatures or aggressive acidic conditions.
Product Overview
- Hawach cellulose extraction thimbles are produced from high‑alpha cellulose pulp with no binding elements. The cellulose thimble offers:
- High purity (high alpha cellulose) – minimal background for accurate results.
- Superior mechanical strength – resists tearing during handling and extraction.
- Consistent porosity (8 µm) – fast solvent flow and efficient extraction.
- Smooth interior and uniform wall thickness – perfect fit in extraction chambers.
- Universal compatibility – works with Soxhlet, Tecator, and similar systems.
Detailed Specifications – Cellulose Extraction Thimbles
| Property | Value |
|---|---|
| Material | High alpha cellulose (virgin pulp), binder‑free |
| Alpha cellulose content | High alpha cellulose |
| Ash content | Low ash |
| Pore size | 8 µm (nominal) |
| Maximum operating temperature | 120°C (248°F) |
| Binder | None |
| Extractable residue | Minimal (high purity) |
| Packaging | 25 pcs per pack |
Applications – Where Cellulose Extraction Thimbles Are Used
Fat Determination
Meat, dairy, food products (standard Soxhlet method).
Pesticide Residues
Extraction from food and agricultural samples.
PCB & Dioxin Analysis
Fish products and environmental samples.
Plasticizers
Phthalates from PVC.
Feed & Detergent Analysis
Additives in feed, organic compounds in detergents.
Air & Slurry Sampling
Dust collection, concrete slurry evaluation.
Environmental Testing
Oil & Grease Extraction, EPA methods.
Food Testing
Crude Fat Analysis, AOAC methods.
Complete Ordering Information – All Sizes
| Cat. No. | Size (OD×H mm) | Wall Thickness (mm) | Packaging |
|---|---|---|---|
| 22031001 | 17×33 | 1.0-1.5 | 25 pcs/pk |
| 22031002 | 19×90 | 1.5-2.0 | 25 pcs/pk |
| 22031003 | 22×60 | 1.5-1.75 | 25 pcs/pk |
| 22031004 | 22×90 | 1.5-1.75 | 25 pcs/pk |
| 22031005 | 25×80 | 1.5-1.75 | 25 pcs/pk |
| 22031006 | 26×60 | 1.5-1.75 | 25 pcs/pk |
| 22031007 | 27×80 | 1.5-2.0 | 25 pcs/pk |
| 22031008 | 28×70 | 1.5-2.0 | 25 pcs/pk |
| 22031009 | 28×100 | 1.5-2.0 | 25 pcs/pk |
| 22031035 | 29×90 | 1.5-2.0 | 25 pcs/pk |
| 22031010 | 30×60 | 1.5-2.0 | 25 pcs/pk |
| 22031011 | 30×80 | 1.5-2.0 | 25 pcs/pk |
| 22031012 | 30×100 | 1.5-2.0 | 25 pcs/pk |
| 22031013 | 33×60 | 1.5-2.0 | 25 pcs/pk |
| 22031014 | 33×80 | 1.5-2.0 | 25 pcs/pk |
| 22031015 | 33×94 | 1.5-2.0 | 25 pcs/pk |
| 22031016 | 34×80 | 1.5-2.0 | 25 pcs/pk |
| 22031017 | 34×100 | 1.5-2.0 | 25 pcs/pk |
| 22031018 | 36×60 | 1.5-2.0 | 25 pcs/pk |
| 22031019 | 36×80 | 1.5-2.0 | 25 pcs/pk |
| 22031020 | 36×94 | 2.0-2.5 | 25 pcs/pk |
| 22031021 | 36×100 | 2.0-2.5 | 25 pcs/pk |
| 22031022 | 37×130 | 2.5-3.0 | 25 pcs/pk |
| 22031023 | 41×120 | 2.5-3.0 | 25 pcs/pk |
| 22031024 | 41×150 | 2.5-3.0 | 25 pcs/pk |
| 22031025 | 47×80 | 2.5-3.0 | 25 pcs/pk |
| 22031026 | 47×123 | 2.5-3.0 | 25 pcs/pk |
| 22031027 | 58×170 | 2.5-3.0 | 25 pcs/pk |
| 22031028 | 70×240 | 2.5-3.0 | 25 pcs/pk |
| 22031029 | 80×200 | 2.5-3.0 | 25 pcs/pk |
| 22031030 | 80×250 | 2.5-3.0 | 25 pcs/pk |
| 22031031 | 95×250 | 2.5-3.0 | 25 pcs/pk |
Why Choose Hawach Cellulose Extraction Thimbles?
Large Volume Filter Tips (5mL & 10mL) – Sterile, Brand-Specific Fit
| Cat. No. | Volume | Compatible Pipette | Description | Packaging |
|---|---|---|---|---|
| 21082301 | 5000μL (5mL) | Thermo Fisher / Brand | Clear, sterile, non-pyrogenic | 600 (40pcs×15racks) |
| 21082302 | 5000μL (5mL) | Eppendorf / Sartorius | Clear, sterile, non-pyrogenic | 360 (24pcs×15racks) |
| 21082303 | 10000μL (10mL) | Eppendorf / Sartorius | Clear, sterile, non-pyrogenic | 360 (24pcs×15racks) |
| 21082304 | 10000μL (10mL) | Thermo Fisher / Brand | Clear, sterile, non-pyrogenic | 360 (24pcs×15racks) |
Why Choose Hawach Filter Pipette Tips
- High alpha cellulose – ultra‑low extractables
- Binder‑free construction – no interference from adhesives
- Consistent wall thickness – reliable fit and flow
- Compatible with most Soxhlet extractors – including Tecator, Büchi, and traditional glass units
- 30+ standard sizes – from 17×33 mm to 95×250 mm
- Suitable alternative to Whatman extraction thimbles – verify dimensions for exact match
- OEM and custom dimensions – available for volume orders
- ISO 9001 certified manufacturing – consistent quality
Bulk Supply & OEM Services
Hawach offers comprehensive supply solutions for laboratories, distributors, and OEM customers:
OEM labeling – custom printing on packaging and private label
Custom dimensions – non‑standard sizes available upon request
Distributor support – bulk pricing, territory protection, and technical documentation
Export packaging – reinforced cartons for international shipping
COA available – batch‑specific certificates of analysis
Fast delivery – stock items ship within 3‑5 working days; bulk orders 2‑3 weeks
Contact us for a customized quote based on your annual volume and packaging preferences.
Selection Guide – How to Choose the Right Extraction Thimble Size
| Extractor Type / Sample Volume | Recommended Size (OD×H mm) | Typical Applications |
|---|---|---|
| Small Soxhlet (50‑100 mL flask) | 17×33, 22×60, 26×60, 30×60 | Small samples, pharmaceutical residues |
| Standard Soxhlet (150‑250 mL) | 25×80, 28×70, 30×80, 33×80, 36×80, 34×80 | Routine fat, pesticide, PCB extraction |
| Large capacity (500‑1000 mL) | 41×120, 41×150, 47×123, 58×170, 70×240 | Food industry, feed analysis, high sample load |
| Extra‑large / industrial | 80×200, 80×250, 95×250 | Bulk extraction, environmental samples |
Fit tip: The thimble outer diameter should be 1‑2 mm smaller than the extractor chamber inner diameter. Height should be 5‑10 mm above the siphon tube top.
Instruction Drawing
Frequently Asked Questions – Cellulose Extraction Thimbles
What is the difference between cellulose extraction thimbles and glass fiber thimbles?
Cellulose thimbles are economical and ideal for routine solvent extractions at ≤120°C. Glass fiber thimbles withstand higher temperatures (500°C) and acidic gases, but cost more. See comparison table above.
Can I use cellulose thimbles with strong acids?
No. Strong acids degrade cellulose. For acidic samples or gaseous acids, use glass fiber thimbles.
What is the maximum temperature for cellulose extraction thimbles?
120°C (248°F). Exceeding this may cause charring.
What is the pore size of these thimbles?
Nominal 8 µm, retaining particles >8 µm while allowing fast solvent flow.
Are Hawach cellulose extraction thimbles compatible with Whatman extraction thimbles?
Yes. Hawach offers many dimensions that can replace Whatman thimbles. Always verify outer diameter and height before ordering.
What solvents can be used with cellulose extraction thimbles?
Common organic solvents: hexane, petroleum ether, acetone, toluene, dichloromethane, ethyl acetate, and alcohols. Avoid strong acids and bases.
Are cellulose extraction thimbles biodegradable?
Yes. Cellulose is biodegradable and can be disposed of as organic waste after extraction (ensure no hazardous residues).
Can extraction thimbles be reused?
Not recommended. Single‑use ensures no cross‑contamination and reliable results. Some labs rinse and reuse for non‑critical applications, but we advise fresh thimbles for each extraction.
What size extraction thimble do I need for my Soxhlet?
Measure the inner diameter of your extraction chamber; the thimble OD should be 1‑2 mm smaller. Height should be 5‑10 mm above the siphon tube top. See selection guide above.
Are cellulose extraction thimbles suitable for AOAC methods?
Yes. They are used in AOAC Official Methods for fat determination (e.g., AOAC 954.02, 960.39, 991.36).
Do you provide certificates of analysis (COA)?
Yes, batch‑specific COA for dimensions, porosity, ash content, and extractable residue available on request.
What is the ash content of Hawach cellulose thimbles?
Low ash – typically less than 0.2%, ensuring minimal interference in gravimetric analysis.
Can cellulose thimbles be used for dioxin analysis?
Yes. High‑purity cellulose thimbles are widely used for dioxin and PCB extraction from environmental samples.
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