Xianghu XH-800B Intelligent Temperature- and Pressure-Controlled Microwave Digestion System
| Brand | Xianghu |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Region of Origin | Domestic (China) |
| Model | XH-800B |
| Price Range | USD 14,000–21,500 |
| Cavity Class | Industrial-Grade |
| Sample Capacity | 8 or 10 vessels |
| Microwave Source | Single Magnetron |
| Max Operating Temperature | 260 °C |
| Max Rated Pressure | 10 MPa |
| Microwave Power Output | 0–1000 W (8-vessel mode), 0–1200 W (10-vessel mode), continuously adjustable |
| Temperature Control Range | 0–260 °C |
| Temp. Measurement Accuracy | ±0.1 °C |
| Temp. Control Stability | ±1 °C |
| Pressure Control Range | 0–6 MPa |
| Max Vessel Burst Pressure Rating | 10 MPa |
| Pressure Measurement Accuracy | ±0.01 MPa |
| Pressure Sampling Rate | 150–200 readings/sec |
| Cavity Volume | ≥42 L |
| Cavity Material | Austenitic stainless steel (316L equivalent) |
| Interior Coating | 5-layer PTFE-based fluoropolymer |
| Rotational Platform | Coaxial, unidirectional, constant-speed |
| Cooling Duration Post-Digestion | 15 min (fan + rotation active) |
| Exhaust Airflow | ≥5 m³/min |
| Microwave Leakage | Compliant with GB 10436-2008 (China National Standard, equivalent to IEC 61000-4-3 & EN 61000-4-3 for RF emission limits) |
Overview
The Xianghu XH-800B Intelligent Temperature- and Pressure-Controlled Microwave Digestion System is an industrial-grade sample preparation platform engineered for high-throughput, reproducible acid digestion of solid and semi-solid matrices prior to elemental analysis (e.g., ICP-OES, ICP-MS, AAS). It operates on the principle of dielectric heating via 2.45 GHz microwave energy, enabling rapid, uniform thermal energy transfer directly into the reaction medium. Unlike conventional conductive heating methods, microwave-assisted digestion achieves faster ramp rates, tighter temperature/pressure control, reduced reagent consumption, and minimized risk of volatile element loss—critical for trace-level quantification in environmental, geological, food, pharmaceutical, and clinical laboratories. The system integrates dual real-time feedback loops for both temperature and pressure across all vessels, ensuring compliance with method requirements defined in ASTM D5762, EPA Method 3052, ISO 15587-1, and USP . Its 42 L resonant cavity, constructed from austenitic stainless steel and lined with five layers of chemically inert fluoropolymer coating, provides robust resistance to concentrated HNO₃, HF, HCl, and aqua regia under sustained high-pressure conditions.
Key Features
- Industrial-grade 42 L cavity fabricated from high-purity austenitic stainless steel (equivalent to ASTM A240 Type 316L), optimized for field homogeneity and long-term structural integrity under cyclic thermal stress.
- Dual independent closed-loop control: simultaneous real-time monitoring and regulation of vessel temperature (±0.1 °C measurement accuracy) and internal pressure (±0.01 MPa resolution, 150–200 Hz sampling rate).
- Fail-safe hardware architecture: automatic microwave cutoff upon detection of pressure overshoot beyond user-defined safety thresholds; redundant mechanical overpressure protection via calibrated burst disc (rated to 10 MPa).
- Uniform irradiation design: coaxial, unidirectional rotating turntable ensures consistent microwave coupling across all vessels—eliminating positional bias and improving inter-vessel RSD to ≤2.5% for certified reference materials (CRMs).
- High-strength PEEK outer vessels: injection-molded from virgin polyetheretherketone (PEEK), wall thickness ≥10 mm (20 mm at sealing interface), rated for continuous operation up to 10 MPa and 260 °C.
- Integrated post-digestion cooling protocol: fan and rotation remain active for 15 minutes after microwave termination to accelerate heat dissipation and prevent thermal shock to vessel assemblies.
- Comprehensive ventilation system: corrosion-resistant centrifugal blower delivering ≥5 m³/min exhaust flow, compatible with laboratory fume hood integration or standalone ducted venting per ANSI Z9.5 guidelines.
Sample Compatibility & Compliance
The XH-800B accommodates up to ten 100 mL high-pressure quartz or TFM-lined digestion vessels, supporting sample masses ranging from 0.1 g (soil/sediment) to 2.0 g (biological tissue) with typical acid volumes of 5–15 mL. It is validated for use with HNO₃, HCl, HF, H₂O₂, and mixtures thereof—including EPA-recommended HF-containing protocols for silicate dissolution. All pressure and temperature sensors are NIST-traceable and undergo factory calibration against primary standards. The system conforms to GB 10436-2008 (microwave leakage ≤5 mW/cm² at 5 cm), meets electromagnetic compatibility (EMC) requirements per GB/T 18268.1–2010 (IEC 61326-1), and supports audit-ready operation under GLP/GMP frameworks through configurable user access levels and electronic log retention.
Software & Data Management
A 7-inch capacitive touchscreen interface provides intuitive navigation and real-time visualization of temperature/pressure trajectories across all vessels. Up to 16 multi-step digestion methods—each containing up to 10 distinct ramp-hold segments—can be stored locally. All run data (time-stamped temperature, pressure, power output, and fault events) are logged internally and exportable via USB to CSV or PDF formats. The system supports optional PC-based software for remote monitoring, method library synchronization, and automated report generation compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, audit trails, and role-based permissions.
Applications
- Environmental analysis: heavy metal determination (Pb, Cd, As, Hg) in soils, sediments, sludges, and airborne particulates per EPA SW-846 Methods 3050B, 3051A, and 3052.
- Geochemical testing: rare earth element (REE) and major oxide quantification in rocks and ores using HF-HNO₃ digestion protocols aligned with ISO 15587-1.
- Food safety: lead, arsenic, and cadmium screening in cereals, dairy products, and infant formula per AOAC 999.10 and EU Commission Regulation (EU) No 836/2012.
- Pharmaceutical QA/QC: residual catalyst metal (Pd, Pt, Rh) testing in active pharmaceutical ingredients (APIs) per USP and ICH Q2(R2).
- Clinical research: trace element profiling (Zn, Cu, Se, Fe) in serum, whole blood, and hair samples following CLIA-validated digestion workflows.
FAQ
What safety certifications does the XH-800B hold?
The system complies with GB 10436-2008 (microwave radiation), GB/T 18268.1–2010 (EMC), and meets mechanical safety requirements per GB 4793.6–2008 (IEC 61010-1). Third-party verification reports are available upon request.
Can the instrument operate under ISO/IEC 17025-accredited laboratory conditions?
Yes—when deployed with configured audit trail logging, user authentication, and method version control, it satisfies documentation and traceability requirements for ISO/IEC 17025:2017 Clause 7.7 (Equipment Management) and Clause 7.8 (Technical Records).
Is HF-compatible digestion supported without cavity degradation?
Yes—the five-layer fluoropolymer interior coating and austenitic stainless steel construction resist HF attack up to 260 °C and 10 MPa; routine cleaning with dilute ammonia post-HF use is recommended to preserve coating longevity.
How is method reproducibility ensured across different operators?
Through standardized method templates, password-protected parameter locking, and integrated calibration certificate tracking—ensuring identical ramp rates, hold times, and safety thresholds regardless of user identity.
What maintenance intervals are recommended for sustained performance?
Annual verification of pressure transducer linearity, temperature sensor drift, and magnetron output power is advised; cavity coating inspection and turntable bearing lubrication should occur every 500 operating hours.
