High Performance Cellulose Extraction Thimbles
Cellulose extraction thimbles are produced from high-quality alpha cellulose cotton linter and have excellent mechanical strength and retention.
Standard single thickness thimbles have a wall thickness of approximately 1 mm (10.0 µm nominal particle retention).
Double thickness thimbles have a wall thickness of approximately 2 mm (6.0 µm nominal particle retention) for applications where higher retention and increased wet or dry strength, or rigidity are required.
The high purity of the materials ensures reliable and reproducible analytical results.
Standard Cellulose Extraction Thimbles
Thimbles of type 603 are made from high-quality cellulose and 603 g thimbles are made from borosilicate glass fibers with an inorganic binder. For all automated extraction apparatus in common use, Whatman offers thimbles whose dimensions are matched exactly to those of the thimble holders to ensure optimal fit.
Thimble size selection guide
Thimble sizes should be selected carefully to fit extractors correctly. The different sizes represent the established practice of showing the internal diameter and overall length of the thimble in millimeters. Therefore, an extra allowance for wall thickness should be made when calculating external diameters. The thimble should pass through the narrower end of the upper extractor socket, allowing 1 to 2 mm clearance, and be 5 to 10 mm above the level of the top of the siphon tube.
| Technical Data - Standard Extration Thimbles |
| Grade |
Material |
Max. temperature °C |
| 603 |
Cellulose |
120 |
| 603 g |
Borosilicate glass fibers* |
500 |
| * With inorganic binder |