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Borosilicate Glass
Separatory funnel
Separating funnel
Separation funnel
Product Overview
A separatory funnel is a precision laboratory glassware used for liquid–liquid extraction, enabling efficient separation of immiscible liquid phases based on density differences. It is widely used in analytical chemistry, organic synthesis, environmental testing, and food analysis.
Key Identifiers
Common Names: Separatory funnel (preferred), Separating funnel
Material: Borosilicate glass (Class A, chemical-resistant)
Stopcock Type: PTFE (Teflon) key or glass key with PTFE sleeve
Joint Type: Ground glass stopper (typically 19/22, 24/29)
Capacity Range: 50 mL – 2000 mL
Shape Variants: Pear-shaped (standard), Squibb (cylindrical)
Construction & Components
Body: Thick-walled borosilicate glass for thermal and chemical stability
Stopper: Interchangeable ground glass stopper for airtight sealing
Stopcock Valve: Precision control for phase drainage
Stem: Narrow outlet for controlled liquid release
Graduation Marks: Approximate volume indication (not for precise measurement)
Applications
Liquid–liquid extraction (LLE)
Organic compound purification
Solvent partitioning (e.g., hexane/water systems)
Sample preparation for GC-MS, HPLC
Oil and fat extraction (food & environmental labs)
Acid-base extraction in organic chemistry
Typical Use Procedure (Concise)
Add mixture + extraction solvent
Stopper and invert
Shake gently; vent intermittently
Allow layers to separate clearly
Drain lower layer via stopcock
Repeat extraction if required
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