Leakproof Separating Funnel PTFE-Stopcock for Solvent Extraction

This glass separating funnel is constructed from borosilicate glass, engineered for liquid-liquid separation and extraction workflows in laboratory and industrial settings. It is equipped with a stopcock and graduated markings, and supports controlled release of immiscible liquids. The product is used across pharmaceutical testing, food analysis, environmental monitoring and fine chemical operations.

Design and Performance Attributes of Glass Separating Funnels

Borosilicate Glass Construction and Chemical Compatibility

The funnel is made of high-grade borosilicate glass, which demonstrates resistance to most acids, alkalis and organic solvents. The material maintains structural stability across typical laboratory temperature ranges, supporting repeated use in sample preparation and extraction procedures.

Stopcock and Ground Joint Design

The funnel is fitted with a leakproof stopcock to regulate liquid flow during separation. Standard ground glass joints are available in multiple specifications to connect with common laboratory apparatus. The stopcock structure enables controlled release of lower liquid layers for phase separation operations.

Graduated Scale and Visibility Features

Clear graduated markings are printed on the funnel body to indicate liquid volume. The transparent glass allows full visibility of the liquid interface during settling and separation, supporting accurate phase separation for analytical and production applications.

Industrial Use Cases for Glass Separating Funnels

Pharmaceutical R&D and Active Ingredient Extraction

This separating funnel is used to extract active ingredients from herbal extracts and separate impurities from drug solutions in pharmaceutical research and development. It supports lab-scale purification and small-batch preparation workflows for pharmaceutical operations.

Food Safety Testing and Sample Preparation

In food testing laboratories, the funnel separates fat, pesticide residues and pigments from food and beverage samples. It provides pretreated samples for chromatographic analysis, supporting compliance with food safety testing protocols.

Environmental Water Quality Monitoring

The funnel extracts organic pollutants, oil and surfactants from wastewater and surface water samples. It enables clear phase separation to support accurate quantification of contaminants and environmental quality assessment procedures.

Fine Chemical Pilot Synthesis

The chemical resistance of the borosilicate glass supports use in fine chemical pilot production. It separates reaction mixtures to maintain intermediate purity during batch chemical synthesis processes.

Academic and Laboratory Teaching

The funnel serves as a standard teaching instrument for chemistry education, demonstrating liquid-liquid separation principles for laboratory training and foundational chemistry instruction.

Dimensional Specifications of Glass Separating Funnels

Ground Joint Specification Reference

Standard Operating Procedure for Glass Separating Funnels

Before use, inspect the stopcock for leaks and close it fully. Pour the mixed liquid into the funnel, then allow it to stand until the two phases separate completely. Open the stopcock slowly to drain the lower layer, and close it promptly when the phase interface reaches the stopcock. Remove the upper layer through the top opening to complete the separation process.