MARS 40-Position Microwave Digestion Vessels – Custom TFM Liners for CEM MARS Series Instruments

Overview

The MARS 40-Position Microwave Digestion Vessels are precision-engineered consumables designed exclusively for compatibility with CEM’s MARS 5, MARS 6, XP55T, EXPRESS, OneTouch, and MARS 6 CLASSIC microwave digestion systems. These vessels operate on the principle of closed-vessel high-pressure, high-temperature acid digestion—enabling rapid, complete mineralization of organic and inorganic matrices under controlled inert conditions. The core architecture employs a dual-layer construction: an inner liner fabricated from TFM (a high-purity, low-extractable perfluoroalkoxy polymer) ensures exceptional chemical resistance to aggressive reagents—including concentrated HF, HNO₃, HCl, and aqua regia—at elevated temperatures and pressures. The outer sleeve is constructed from aerospace-grade carbon fiber–Kevlar hybrid composite, providing structural integrity and thermal stability across a certified operational range of −200 °C to +260 °C (with optional +300 °C-rated variants available upon request). This design enables safe, reproducible sample preparation for trace-metal analysis by ICP-MS, ICP-OES, AAS, and other elemental detection platforms requiring ultra-low background contamination.

Key Features

• Chemically inert TFM inner liners (ASTM D4894-compliant fluoropolymer) minimize analyte adsorption and leaching—critical for sub-ppt level trace metal quantification
• PFA lids and TFM/PTFE gaskets ensure hermetic sealing and consistent pressure containment up to 200 bar (2900 psi)
• Outer sleeves engineered from filament-wound carbon fiber–Kevlar composite deliver mechanical robustness, thermal shock resistance, and dimensional stability during rapid heating/cooling cycles
• Standardized 55 mL geometry (φ20 mm ID × 191 mm body height) optimized for uniform microwave energy coupling and predictable pressure/temperature profiles across all 40 positions
• OEM-aligned dimensional tolerances (±0.1 mm) guarantee seamless integration with CEM rotor assemblies, pressure sensors, and temperature monitoring probes
• Available in multiple configurations: 40-position (25 mL, 55 mL, 75 mL), 24-position (100 mL, 110 mL), and 12-position CEM EasyPrep (100 mL) formats—all sharing identical material specifications and thermal ratings

Sample Compatibility & Compliance

These digestion vessels support a broad spectrum of sample types—including soils, sediments, biological tissues, foodstuffs, polymers, catalysts, and geological materials—when processed with HNO₃/HF/H₂O₂ or alternative EPA Method 3051A/3052-compliant acid mixtures. All TFM and PFA components meet USP Class VI biocompatibility requirements and comply with ISO 10993-5 for cytotoxicity. Vessel assemblies are manufactured under ISO 9001-certified quality management systems, with full traceability of raw material lot numbers and batch-specific validation documentation. For regulated environments, the system supports GLP/GMP workflows when paired with CEM’s SmartView™ software and audit-trail-enabled instrument firmware (21 CFR Part 11 compliant when configured with electronic signatures).

Software & Data Management

While the vessels themselves are passive consumables, their standardized geometry and material consistency directly support automated method transfer and data reproducibility across CEM platforms. When used with SmartView™ or MARS Touch software, the 55 mL TFM configuration enables precise correlation between setpoint parameters (ramp time, hold temperature, power profile) and measured vessel-specific pressure/temperature responses. Batch-level metadata—including vessel part number (907576), gasket lot (212020), and sleeve serial (212025)—can be logged into LIMS via barcode scanning, ensuring full chain-of-custody for accredited laboratories performing ISO/IEC 17025 testing.

Applications

• Environmental testing: EPA 3051A, 3052, and ASTM D5765 soil/sediment digestion for Pb, Cd, As, Cr, Hg quantification
• Clinical & pharmaceutical: USP / elemental impurities testing in APIs and excipients
• Food safety: AOAC 2013.06 and EN 13805 multi-element residue analysis in dairy, cereals, and infant formula
• Materials science: Digestion of battery cathodes (NMC, LFP), catalysts, and nanomaterials prior to ICP-MS speciation
• Geochemical research: High-silica rock dissolution using HF-containing protocols without vessel degradation

FAQ

Are these vessels certified for use with CEM MARS 6 CLASSIC?
Yes—these TFM liners are dimensionally and thermally validated for full compatibility with CEM MARS 6 CLASSIC rotors, including pressure sensor alignment and temperature probe clearance.
Can TFM liners be substituted for PFA in all MARS models?
TFM is approved for all listed instruments; however, PFA is recommended only for non-HF applications due to its lower thermal limit (260 °C max) and reduced resistance to hydrofluoric acid attack.
What is the maximum recommended pressure for the 55 mL TFM configuration?
The validated pressure limit is 200 bar (2900 psi) at 260 °C, consistent with CEM’s published safety margins for closed-vessel operation.
Do you provide certificates of conformance or material test reports?
Yes—each shipment includes a CoC listing material grade, lot number, dimensional verification, and extractables testing summary per ASTM D5223 Annex A1.
Is cleaning and reuse permitted?
TFM liners may be reused after rigorous cleaning (e.g., 10% HNO₃ soak, ultrasonic rinse, DI water flush) provided no visual etching, discoloration, or dimensional deformation is observed; however, single-use is recommended for regulatory submissions.