Microwave Extraction System

What is the Microwave Extraction System?

A microwave extraction system heats solvent and sample rapidly with microwave energy to speed extraction. It is used for environmental, food and material samples where short extraction times are advantageous in the laboratory.

Overview

A microwave extraction system heats the solvent and sample together in a sealed or open vessel using microwave energy, which couples directly with the liquid and raises temperature rapidly and uniformly. The high temperature speeds dissolution and diffusion of analytes into the solvent, so extraction can be finished in minutes rather than hours. Sealed vessels allow higher temperatures and volatile retention, while open vessels suit larger samples or where venting is required. Temperature, pressure, solvent and time are programmed, and the extract is filtered or centrifuged before analysis. The technique uses less solvent than Soxhlet and suits many environmental and food methods.

How does it work?

Extraction transfers analytes from a solid or semi-solid matrix into a solvent that can be analyzed or further cleaned. Soxhlet extraction repeatedly cycles condensed solvent through the sample, giving thorough extraction over time. Accelerated solvent extraction uses elevated temperature and pressure to keep the solvent liquid and speed transfer. Supercritical fluid extraction uses carbon dioxide above its critical point, whose low viscosity and high diffusivity penetrate the matrix rapidly and leave little residue. Microwave extraction heats the solvent and sample together, while ultrasonic extraction uses cavitation to disrupt the matrix and improve mass transfer. Temperature, pressure, solvent choice and time determine recovery.

What are the key features?

• Rapid microwave heating of solvent and sample
• Sealed or open vessel options
• Short extraction times of minutes
• Programmable temperature and pressure
• Reduced solvent consumption

What are the technical specifications?

A typical microwave extraction system configuration offers vessel volume of 50–500 mL, max temperature of Up to 200 °C, max pressure of Up to 20 bar, extraction time of 5–30 min, microwave power of 600–1,600 W and positions of 6–40 vessels. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Microwave Extraction System is used in environmental pollutant extraction, food contaminant and pesticide residue analysis, polymer and plastic additive extraction and pharmaceutical sample preparation. Across the wider Extractors class, laboratories also deploy it for fat and oil determination in food, environmental organic pollutant extraction and pharmaceutical and natural product isolation.

Which standards and certifications apply?

Relevant standards and methods include EPA 3540C, EPA 3545A, EPA 3546, ISO 659 and IEC 61010-1. Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Handle solvents in a fume hood and use the protective equipment specified for the solvent and the extraction conditions. Dry and grind the sample consistently, because moisture and particle size affect penetration and recovery. Optimise and validate temperature, pressure, solvent and time for each matrix, and verify recovery with a certified reference material or a spiked sample. Clean and check seals, vessels and tubing, since leaks waste solvent and can be hazardous at high pressure. Recover or dispose of solvents according to regulations, and record all parameters for traceability.

How do I select the right Microwave Extraction System?

Choose a microwave extraction system for rapid extraction of many samples where time and solvent savings matter. Confirm the vessel type suits the analytes, the temperature and pressure meet the method, and the number of positions matches the workload. In an RFQ state the matrix, analyte, solvent and throughput.

How does it compare with other Extractors variants?

Choose an extraction technique according to the analyte, the matrix and the required throughput. Soxhlet extraction is the classical reference method and suits fat and oil determination, but it is slow and uses more solvent. Accelerated solvent extraction is faster and uses less solvent, and suits many environmental and food methods. Supercritical fluid extraction is efficient and nearly solvent-free, and suits non-polar and moderately polar analytes. Microwave and ultrasonic extraction are rapid and suit samples where the matrix is easily penetrated. Confirm the achievable recovery, the solvent consumption, the temperature and pressure limits, and whether the system can handle the sample number required.