PreeKem Yitao TOPEX+ Advanced Microwave Digestion System
| Brand | PreeKem/Yitao |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Origin Category | Domestic (China) |
| Model | TOPEX+ |
| Price Range | USD 28,000 – 112,000 |
| Cavity Class | Industrial-Grade |
| Sample Capacity | 15–40 vessels |
| Microwave Source | Dual Magnetron |
| Max Temperature | 500 °C |
| Max Pressure | 15 MPa |
Overview
The PreeKem Yitao TOPEX+ Advanced Microwave Digestion System is an industrial-grade, high-performance platform engineered for precision-controlled, closed-vessel microwave-assisted sample preparation. It operates on the principle of dielectric heating via non-pulsed continuous microwave energy—delivered through dual magnetrons with vector-field optimized cavity architecture—to achieve uniform and reproducible thermal distribution across all reaction vessels. Unlike conventional pulsed systems, the TOPEX+ employs real-time anode current modulation to sustain truly continuous microwave output, enabling stable power delivery across the full 0–1600 W range. Its core innovation lies in the patented Microwave Directional Compression Technology (ZL 2014 1 0220143.3), which leverages electromagnetic field modeling and top-layer reflective cavity design to concentrate microwave energy selectively within the sample zone—minimizing cavity-mode interference and enhancing inter-vial reaction parallelism. Designed for laboratories requiring GLP-compliant, auditable, and high-throughput digestion workflows, the TOPEX+ supports method development for trace metal analysis (e.g., ICP-MS, AAS), environmental monitoring, pharmaceutical QA/QC, and geological sample dissolution under stringent regulatory frameworks.
Key Features
- Industrial-class cavity constructed from reinforced stainless steel with multi-layer PFA (perfluoroalkoxy alkane) coating—resistant to prolonged exposure to concentrated HNO₃, HF, HCl, and aqua regia up to 500 °C.
- Dual magnetron configuration with offset resonant alignment ensures spatially homogeneous field distribution; validated via cavity mode mapping per IEC 61000-4-3.
- True continuous-wave (CW) microwave emission—no duty-cycle modulation—enabling precise kinetic control over exothermic decomposition pathways.
- High-frequency closed-loop control: temperature and pressure data sampled at 100 Hz (10 ms intervals) and fed back to PID-regulated power output for sub-degree thermal fidelity and ±0.1 MPa pressure stability.
- Triple infrared temperature monitoring: bottom-facing IR sensor + dual side-wall IR sensors—allowing simultaneous vessel-base and sidewall thermal profiling without physical probe insertion.
- Integrated magnetic stirring system actuating all vessels synchronously at variable speeds (0–600 rpm), improving mass transfer and reducing intra-batch variance in heterogeneous matrices.
- Self-calibration suite embedded in firmware: user-accessible routines for temperature, pressure, and microwave power validation—supporting ISO/IEC 17025 internal verification requirements.
Sample Compatibility & Compliance
The TOPEX+ accommodates standard rotor configurations supporting 15–40 high-pressure quartz or composite fiber-reinforced PTFE vessels (max 100 mL volume). Compatible with EPA Methods 3050B, 3051A, 3052; ASTM D5511, D5699; and ISO 11885 for heavy metal extraction from soils, sludges, sediments, biological tissues, polymers, and catalysts. All pressure-rated components conform to ASME BPVC Section VIII Div. 1 design standards. The system meets CE electromagnetic compatibility (EMC) Directive 2014/30/EU and Low Voltage Directive 2014/35/EU. Full audit trail logging—including parameter changes, calibration events, and run metadata—is compliant with FDA 21 CFR Part 11 when deployed with optional secure user authentication and electronic signature modules.
Software & Data Management
The integrated 10.1-inch capacitive touchscreen runs a deterministic real-time OS with embedded digestion method library (pre-loaded with >120 validated protocols). Software features include dynamic ramp-hold programming, multi-stage pressure/temperature setpoint sequencing, automatic safety interlock diagnostics, and export of time-stamped CSV/Excel datasets with full curve metadata (T vs. t, P vs. t, W vs. t). Data integrity safeguards include write-once storage partitioning, SHA-256 hash verification of raw logs, and optional networked backup to TLS-secured NAS or LIMS integration via OPC UA or RESTful API. All method files support version control and digital signature binding for regulated environments.
Applications
- Ultra-high-pressure microwave digestion of refractory matrices (e.g., silicates, ceramics, alloys) up to 15 MPa and 500 °C.
- High-throughput digestion of clinical biospecimens (urine, serum, tissue) for multi-element ICP-MS quantification.
- Closed-vessel microwave-assisted extraction (MAE) of PAHs, PCBs, and organometallics using organic solvents under inert atmosphere.
- Synthesis of nanomaterials and MOFs under controlled thermobaric conditions with real-time kinetic monitoring.
- Method validation studies requiring <±2% RSD in replicate digestions across 40-vessel batches—demonstrated per ISO 5725-2 repeatability criteria.
FAQ
What safety certifications does the TOPEX+ hold for international laboratory use?
The system carries CE marking per EU Machinery Directive 2006/42/EC and EMC Directive 2014/30/EU. Pressure vessel design complies with PED 2014/68/EU and ASME BPVC Section VIII Div. 1. Factory-installed safety interlocks meet IEC 61508 SIL2 requirements.
Can the TOPEX+ be integrated into a centralized LIMS environment?
Yes—via optional OPC UA server module or HTTP-based REST API, supporting automated method push, run initiation, and structured data ingestion (including full traceability metadata) into major LIMS platforms.
Is remote monitoring and control supported?
Local Ethernet/Wi-Fi connectivity enables browser-based remote status viewing and emergency stop activation. Full remote operation (method editing, start/stop) requires on-premise VPN and role-based access control enabled via enterprise software license.
How often must the system undergo metrological verification?
Per ISO/IEC 17025:2017 Clause 6.6, temperature and pressure sensors should be verified annually against NIST-traceable references; the built-in self-calibration tools allow daily functional checks without external equipment.
Does the TOPEX+ support digestion methods requiring inert gas purging?
Yes—the system includes configurable purge cycles (N₂ or Ar) with mass flow control and real-time O₂ residual monitoring (<10 ppm detection limit) for oxygen-sensitive decompositions.
