Frequently Asked Questions About the Kiriyama Glass EX92A-1-1 Soxhlet Extractor (100 mL):

General Information

1. What is the Kiriyama Glass EX92A-1-1 Soxhlet extractor?

The EX92A-1-1 is a 100 mL continuous solvent extraction setup made of borosilicate glass. It consists of a Soxhlet chamber, a 100 mL round-bottom flask, and an Allihn condenser, all joined with standard ground glass connectors.

2. Which components are included in the EX92A-1-1 kit?

100 mL Soxhlet extraction tube (EX92A-1)

100 mL round-bottom flask with GND 24/29 joint

Allihn condenser with upper and lower GND 24/29 joints

Optional support stand and clamps (sold separately)

Technical Specifications

3. What is the maximum solvent capacity?

The round-bottom flask holds up to 100 mL of solvent. Typical working volumes range from 50 to 70 mL to allow for proper vaporization and reflux.

4. How much sample can I process at once?

A standard cellulose thimble (24 × 90 mm) fits inside the Soxhlet chamber and accommodates approximately 5–10 g of dry, ground sample, depending on thimble porosity.

5. What are the ground glass joint sizes?

Flask to Soxhlet tube: GND 24/29

Soxhlet tube to condenser: GND 24/29

Condenser hose connections: standard 6 mm or 8 mm outer-diameter tubing

Principle and Operation

6. How does a Soxhlet extraction work?

The solvent in the flask is heated to reflux.

Vapor travels up into the condenser and drips back into the Soxhlet chamber.

The solvent accumulates around the sample and extracts compounds.

Once full, the solvent siphons back into the flask, carrying dissolved analytes.

The cycle repeats until extraction is complete.

7. What is a typical extraction procedure?

Dry your sample in an oven at 80 °C to remove moisture.

Load the thimble and place it in the Soxhlet tube.

Add solvent (50–70 mL) to the flask and assemble the apparatus.

Begin gentle heating to maintain a steady drip rate (3–4 drops per second).

Run for 6–8 hours or until extracts appear clear.

Cool, dismantle, and recover the solvent for further processing.

Assembly and Setup

8. How do I assemble the EX92A-1-1 extractor?

Secure the flask on a heating mantle or water bath.

Attach the Soxhlet tube to the flask via the GND 24/29 joint.

Place the condenser atop the Soxhlet tube and tighten with a clamp.

Connect inlet and outlet hoses to the condenser (cold water in at the bottom, out at the top).

Ensure all joints are snug and supported.

9. What solvent volume and heating settings work best?

Fill the flask to no more than two-thirds capacity to prevent bumping.

Use a heating mantle or oil bath set to yield mild reflux—avoid vigorous boiling to reduce bumping and vapor loss.

Maintenance and Cleaning

10. How do I clean and maintain the unit?

Disassemble and rinse each glass part with an appropriate solvent (acetone or ethanol).

Use a soft brush for stubborn residues inside the Soxhlet chamber.

Dry components at 105 °C or allow to air-dry in a dust-free environment.

Inspect ground joints for chips or roughness before each use.

Safety Precautions

11. What safety measures should I take?

Wear chemical-resistant gloves, safety goggles, and a lab coat.

Operate under a fume hood to avoid inhaling solvent vapors.

Check all glassware for cracks and ensure joints are properly lubricated.

Never allow the flask to run dry while heating to prevent thermal shock.

Troubleshooting

12. What should I do if the system leaks solvent vapor?

Ensure ground glass joints are clean and lightly greased with vacuum grease.

Replace any chipped or scratched joints.

Tighten clamps to stabilize connections without overtightening.

13. Why isn’t condensation occurring efficiently?

Increase coolant flow through the condenser.

Check that water inlet is at the condenser’s lowest port and outlet at the top.

Confirm the condenser jacket is free from blockages or air pockets.

Applications

14. What applications is this extractor suited for?

Fat and oil extraction from plant material, soils, or food products

Isolation of active ingredients from herbal samples

Preparation of environmental samples for pesticide or pollutant analysis

Ordering and Accessories

15. Can I upgrade to a larger flask size?

Yes. You can substitute a 250 mL or 500 mL round-bottom flask with the same GND 24/29 joint to increase solvent capacity and process larger sample loads.

16. Where can I purchase spare parts and accessories?

Contact QTE Technologies.