PreeKem Yitao TOPEX-EX Universal Microwave Synthesis & Extraction Platform

Overview

The PreeKem Yitao TOPEX-EX Universal Microwave Synthesis & Extraction Platform is an engineered solution for laboratories requiring precise, reproducible, and scalable microwave-assisted chemical processing. Designed around vector-field microwave cavity architecture, the system employs directional microwave compression technology—based on electromagnetic field modeling and top-layer reflective cavity design—to concentrate energy uniformly within the sample zone. This eliminates hot-spot formation and ensures consistent thermal distribution across multiple vessels, a critical requirement for analytical digestion, extraction, and synthetic protocols where inter-vessel variability must be minimized. Unlike conventional pulsed microwave systems, the TOPEX-EX delivers true continuous-wave (CW) output via anode current modulation of dual industrial magnetrons, enabling fine-grained power regulation from 0 to 3200 W without duty-cycle artifacts. Its operational envelope spans 0–500 °C at ±0.1 °C stability, supported by real-time dual-parameter (temperature + pressure) feedback at 100 Hz sampling frequency—meeting the dynamic control demands of high-pressure sealed chemistry.

Key Features

• Vector-field optimized cavity with top-reflector geometry for uniform energy distribution and enhanced reaction parallelism
• Dual industrial magnetrons arranged in offset resonant configuration to suppress standing wave nodes and improve field homogeneity
• 316L stainless steel cavity body with multi-layer PFA (perfluoroalkoxy) coating—chemically inert against concentrated HNO₃, HF, HCl, and aqua regia over extended service life
• True non-pulsed continuous microwave emission: no power overshoot or thermal lag; ideal for kinetic-sensitive reactions and temperature-programmed protocols
• Integrated 10.1″ capacitive touchscreen HMI running embedded real-time OS—no external PC required for operation or method storage
• Simultaneous dual-sensor monitoring (RTD + piezoresistive transducer) with closed-loop PID control for both temperature and pressure
• Graphical curve rendering of time–temperature, time–pressure, and time–power profiles during active runs
• Configurable ramp-hold programs with up to 10 segments, including user-defined heating rates (°C/min), dwell times, and power ceilings

Sample Compatibility & Compliance

The TOPEX-EX supports a wide range of rotor configurations—including high-pressure (up to 200 bar), high-throughput (up to 40 positions), and large-volume (≥100 mL) vessels—enabling adaptation to diverse workflows: EPA Method 3051A/3052 digestion, ISO 11466 soil metal extraction, ASTM D5511 solid waste characterization, and USP heavy metals testing. All vessel materials comply with FDA 21 CFR §177.1550 (fluoropolymer food-contact compliance) and meet GLP/GMP documentation requirements for audit-ready traceability. The system’s firmware logs all run parameters—including timestamps, setpoints, actuals, alarms, and operator ID—with optional export in CSV or PDF format for regulatory submission. Pressure and temperature calibration certificates are provided per IEC 61000-4-3 (EMC) and ISO/IEC 17025-accredited procedures.

Software & Data Management

The embedded operating system features role-based access control (admin/operator/guest), electronic signature support per FDA 21 CFR Part 11 Annex 11, and automatic generation of ALCOA+ compliant audit trails. Method libraries support version-controlled protocol templates with parameter locking, validation flags, and mandatory electronic sign-off prior to execution. Data export includes raw sensor streams (100 Hz resolution), summary statistics (mean, SD, CV%), and annotated graphical reports. Optional Ethernet/Wi-Fi connectivity enables remote monitoring via secure HTTPS interface and integration into LIMS environments using standard RESTful APIs. No proprietary drivers or client software are required for data retrieval.

Applications

• High-pressure acid digestion of geological, environmental, and biological matrices for elemental analysis (ICP-MS/OES)
• Accelerated solvent extraction (ASE) of PAHs, PCBs, pesticides, and pharmaceutical residues from soils, sediments, and tissues
• Controlled organic synthesis—including Suzuki couplings, esterifications, and heterocycle formations—under sealed, inert conditions
• Rapid leaching protocols for battery cathode materials (NMC, LFP) and electronic waste recovery
• Hydrothermal carbonization and biomass pretreatment for biofuel feedstock development
• Method development and validation studies requiring strict adherence to ISO/IEC 17025 uncertainty budgets

FAQ

What safety certifications does the TOPEX-EX hold?

The platform complies with IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and IEC 61000-4-3 (Radiated RF Immunity). CE marking is affixed per EU Machinery Directive 2006/42/EC and EMC Directive 2014/30/EU.
Can the system be integrated into automated laboratory workflows?

Yes—via Modbus TCP or optional OPC UA server module, enabling bidirectional communication with robotic arms, autosamplers, and central process control systems.
Is method transfer possible between different rotor types?

The software includes cross-rotor scaling algorithms based on volumetric heat capacity and surface-area-to-volume ratios, allowing validated methods to be ported between 8-, 16-, and 40-position configurations with minimal re-optimization.
What maintenance intervals are recommended for magnetrons and sensors?

Magnetrons are rated for ≥5,000 hours of operation; annual verification of temperature/pressure sensor accuracy against NIST-traceable references is advised per ISO/IEC 17025 Clause 6.4.