MICHEM MP Series Industrial-Grade Microwave Digestion System
| Brand | MICHEM |
|---|---|
| Origin | Beijing, China |
| Model | MP Series |
| Microwave Frequency | 2450 ± 13 MHz |
| Output Power | 1200 W (0–100% PID-controlled) |
| Cavity Volume | 45 L |
| Max Temperature | 260 °C |
| Max Pressure | 1500 psi (10.34 MPa) |
| Sample Capacity | 10 vessels per run |
| Magnetron | Single |
| Cavity Coating | PFA (DuPont™) |
| Outer Vessel Material | PEEK (10 MPa rating) |
| Inner Vessel Material | TFM™ (perfluoroalkoxy alkane) |
| Temperature Control Accuracy | ±0.5 °C (Pt100 sensor) |
| Pressure Control Accuracy | ±0.01 MPa (direct-contact transducer) |
| Microwave Leakage | ≤0.3 mW/cm² |
| Cooling Airflow | 3 m³/min |
| Safety Features | Dual-stage pressure relief membrane, self-locking sliding safety door (Patent ZL 200420032536), real-time temperature/pressure dual monitoring, over-pressure/over-temperature cut-off, cavity interlock, and fail-safe power shutdown |
Overview
The MICHEM MP Series Industrial-Grade Microwave Digestion System is a high-performance, CE-compliant sample preparation platform engineered for rapid, reproducible, and trace-metal-safe decomposition of complex matrices under controlled high-temperature and high-pressure conditions. Operating at the standard industrial microwave frequency of 2450 MHz, the system utilizes single-magnetron energy delivery coupled with PID-regulated power modulation (0–100%) to ensure precise thermal input across all 10 sample positions simultaneously. Its sealed-vessel digestion principle—based on microwave-assisted acid oxidation in pressurized TFM™ inner vessels housed within reinforced PEEK™ outer vessels—enables complete mineralization of recalcitrant organic, geological, biological, and environmental samples while minimizing volatile element loss (e.g., As, Hg, Se, Pb). The system conforms to core methodological requirements of EPA Method 3051A/3052, ASTM D5511, ISO 11466, and USP , supporting validated workflows for elemental analysis by ICP-MS, ICP-OES, AAS, and AFS.
Key Features
- Industrial-grade 45-L cavity with DuPont™ PFA coating—chemically inert to concentrated HNO₃, HF, HCl, and aqua regia up to 300 °C
- True dual-parameter control: simultaneous real-time monitoring and regulation of temperature (via Pt100 sensor, ±0.5 °C accuracy) and pressure (via direct-contact transducer, ±0.01 MPa resolution)
- Patented self-locking sliding safety door (ZL 200420032536) with mechanical + electronic interlocks and secondary pressure-relief membrane system (rated at 200 psi and 400 psi thresholds)
- 360° bidirectional rotating turntable with programmable speed (0–5000 rpm), ensuring uniform microwave field distribution and eliminating positional bias
- Integrated forced-air cooling (3 m³/min) with external venting capability—reduces post-digestion cooling time to ≤20 minutes before safe vessel opening
- Compliance-ready architecture: microwave leakage ≤0.3 mW/cm² (well below IEC 61000-3-2 and GB 4706.21 limits), EMI-shielded electronics, and fail-safe power cutoff on fault detection
Sample Compatibility & Compliance
The MP Series accommodates a broad spectrum of sample types—including soils, sediments, sludge, plant tissues, animal organs, polymers, catalysts, and pharmaceutical excipients—using disposable or reusable TFM™/PEEK™ vessels (10–1500 mL capacity). Vessel integrity is maintained under sustained pressures up to 1500 psi (10.34 MPa) and temperatures up to 260 °C, satisfying the mechanical stress requirements of ISO/IEC 17025-accredited laboratories. All digestion protocols are fully traceable and support GLP/GMP documentation needs via timestamped method storage, audit trails, and electronic signature compatibility (when paired with compliant LIMS or ELN systems). The system meets electromagnetic compatibility (EMC) Class B requirements per CISPR 11 and is designed for integration into FDA 21 CFR Part 11–compliant environments when used with validated software configurations.
Software & Data Management
The MP Series offers two operational modes: A-type (laptop-based) and C-type (embedded microcontroller). The A-type configuration includes proprietary MICHEM Digilab™ software, which provides real-time graphical visualization of temperature and pressure profiles across all vessels, customizable multi-step ramp-hold programs (up to 8 segments per method), unlimited method library storage, and export of CSV/Excel-compatible raw data logs. All sessions include automatic metadata tagging (user ID, date/time, method name, vessel IDs). Software supports method validation reporting per ISO/IEC 17025 Annex A.5 and enables seamless transfer of digestion parameters to downstream analytical instruments (e.g., ICP-MS autosampler triggers via TTL interface). Audit trail functionality records all parameter changes, user logins, and system alerts—essential for regulatory inspections.
Applications
This system serves as a primary sample preparation tool for accredited environmental testing labs (EPA 6010D, 6020B), clinical toxicology units (blood/tissue metal quantification), geochemical survey programs (rock/ore digestion per ISO 11466), food safety monitoring (heavy metals in infant formula per EU 1881/2006), and materials R&D (catalyst leaching studies, battery cathode digestion). It replaces open-vessel hotplate digestion and conventional reflux methods in QA/QC workflows for ICP-MS laboratories requiring sub-ppt detection limits and minimal procedural blanks. Its modular design also supports microwave-assisted extraction (MAE), hydrolysis, and organic synthesis protocols when equipped with optional quartz or borosilicate reaction vessels.
FAQ
What safety certifications does the MP Series hold?
The system complies with IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and meets EMC Class B emission limits per CISPR 11. It is CE-marked and conforms to Chinese national standards GB 4706.21 and GB/T 18268.26.
Can the MP Series be integrated into an automated laboratory workflow?
Yes—via RS-232/USB communication and TTL-triggered I/O ports, the system supports synchronization with robotic sample handlers, autosamplers, and LIMS platforms. Method parameters can be imported/exported in XML format.
What is the expected service life of the PTFE-based digestion vessels?
TFM™ inner vessels typically withstand ≥500 digestion cycles under standard HNO₃/HF protocols at ≤220 °C; PEEK™ outer vessels exceed 1000 cycles when operated within rated pressure/temperature limits.
Does the system support method validation per ISO/IEC 17025?
Yes—built-in calibration verification routines for temperature and pressure sensors, combined with full digital audit trails and electronic signatures (in A-type mode), satisfy Clause 7.7 (Ensuring Validity of Results) and Clause 7.8 (Reporting Results) of ISO/IEC 17025:2017.
Is remote monitoring supported?
The A-type software includes LAN-enabled remote access (with password-protected authentication), allowing real-time supervision and emergency intervention from off-site workstations within the same intranet domain.
