Glass Fiber Extraction Thimbles, Binder-Free, 19 x 90mm, Nonsterile, 25/Pk
GVS SKU: ET19090GF0Q00

Featuring a depth medium of 100% pure borosilicate glass microfiber, these cylindrical extraction thimbles with a rounded bottom contain solid samples during Soxhlet and automated solvent extraction. The thimbles measure 19mm inner diameter by 90mm in height and are completely free of binders or additives, making them well suited for use with aggressive solvents and strong acids that are incompatible with cellulose thimbles. The binder-free borosilicate construction withstands temperatures up to 500C, supporting high-temperature extractions, gravimetric workflows, and pollution monitoring techniques.

Key Glass Fiber Media Characteristics

Hydrophilic borosilicate glass microfiber depth medium captures fine particulate matter throughout the media structure rather than at a single surface.
Binder-free composition introduces no organic extractables, keeping analytical background low for gravimetric and trace determinations.
High particulate loading capacity combined with fast flow makes the medium ideal for heavily loaded samples.
Broad chemical compatibility allows use with strong acids and aggressive solvents that degrade cellulose thimbles.
Thermal stability up to 500C permits high-temperature extraction and muffle furnace pre-conditioning to establish a clean baseline.

Key Construction Characteristics

Form factor: cylindrical body with a rounded bottom, designed to fit most commercially available Soxhlet extractors.
Dimensions: 19mm inner diameter by 90mm height.
Material: 100% pure borosilicate glass microfiber, no binders or additives.
Sterility: nonsterile.
Pack: 25 thimbles per pack.

The seamless glass microfiber construction provides predictable solvent distribution and reproducible extraction performance across the thimble surface. Inert borosilicate composition ensures analytical results reflect true sample content rather than thimble-derived contamination, protecting sample integrity in regulated workflows. Consistent wall geometry and thermal stability deliver reliable performance through repeated thermal cycling.