MARSXpress Microwave Digestion Vessel Cap (55 mL) – Part No. 212020XP55T

Overview

The MARSXpress Microwave Digestion Vessel Cap (Part No. 212020XP55T) is a precision-engineered consumable component designed exclusively for compatibility with the 55 mL high-pressure microwave digestion vessels (vessel body P/N 907576) in the MARS series of closed-vessel microwave sample preparation systems. This cap integrates a pressure-relief safety mechanism, chemically resistant sealing gasket, and torque-optimized thread geometry to ensure consistent, leak-free operation under elevated temperature and pressure conditions—typically up to 300 °C and 100 bar during routine acid digestion protocols. As a critical interface between vessel body and microwave cavity, the cap maintains system integrity by preventing volatile loss, cross-contamination, and uncontrolled venting while enabling real-time pressure and temperature monitoring via integrated sensor ports in compatible MARSXpress instrumentation.

Key Features

• Chemically inert sealing surface fabricated from high-purity PTFE–TFM composite, resistant to concentrated HNO₃, HF, HCl, and aqua regia at elevated temperatures
• Integrated pressure-release diaphragm calibrated to activate at 100 ± 5 bar, complying with ISO 17025–recommended safety thresholds for microwave-assisted digestion
• Threaded interface engineered to match the exact pitch and tolerance of MARS-series vessel bodies (P/N 907576), ensuring repeatable torque application (recommended 22–25 N·cm) and uniform sealing force distribution
• Autoclavable and reusable up to 100 thermal cycles when maintained per manufacturer’s cleaning protocol (e.g., ultrasonic rinse in dilute NaOH followed by DI water flush)
• Traceable lot numbering and QC-certified dimensional verification (±0.05 mm radial tolerance, ±0.1° thread angle deviation) documented in CoA supplied with each batch

Sample Compatibility & Compliance

This cap supports digestion of diverse solid and semi-solid matrices—including geological samples (soils, sediments), biological tissues (plant, animal), polymers, and environmental filters—when used with validated MARSXpress method templates (e.g., EPA Method 3052, ISO 15587-1, GB/T 22914–2008). It conforms to CE-marked electromagnetic compatibility (EMC) requirements for microwave laboratory equipment and meets material safety specifications outlined in EU Directive 2002/72/EC for food-contact polymer components. While not classified as a standalone analytical instrument, its design aligns with GLP principles for traceability, calibration control, and documented maintenance history in regulated QA/QC environments.

Software & Data Management

As a passive hardware component, the cap does not interface directly with instrument software. However, its mechanical performance directly influences data reliability in MARSXpress systems equipped with proprietary software (e.g., MARS Link v4.x). Consistent cap installation ensures accurate pressure transduction and stable thermal profiles—parameters logged and auditable within the system’s 21 CFR Part 11–compliant electronic record architecture. Batch-specific cap usage logs can be manually entered into LIMS or ELN platforms to support full sample-to-result chain-of-custody reporting.

Applications

• Routine multi-element analysis (ICP-OES, ICP-MS) requiring complete matrix dissolution of refractory silicates and metal alloys
• Regulatory compliance testing for heavy metals in consumer products (CPSIA, RoHS) and pharmaceutical excipients (USP <231>)
• Method development for high-throughput environmental monitoring labs processing >50 samples/day
• Reference material certification workflows where digestion reproducibility (RSD <3% across n=6 replicates) is mandated by ISO Guide 35
• Academic research involving sequential extraction or low-volume digestate recovery for speciation studies

FAQ

Is this cap compatible with non-MARS microwave digestion systems?
No—this cap is dimensionally and functionally specific to MARS-series vessels (P/N 907576). Interchangeability with CEM, Milestone, or Anton Paar systems is not guaranteed and may compromise safety or analytical validity.
What is the maximum recommended reuse count before replacement?
Under controlled cleaning and handling conditions, up to 100 digestion cycles are supported; however, visual inspection for gasket compression set, thread wear, or discoloration is required prior to each use per SOP-DM-012.
Does the cap include an embedded RFID tag or barcode for inventory tracking?
No—batch-level traceability is provided via printed lot number on packaging; integration with RFID-enabled lab asset management requires third-party labeling.
Can this cap be sterilized for microbiological sample preparation?
Yes—autoclaving at 121 °C / 15 psi for 20 minutes is permissible, but repeated steam exposure degrades TFM gasket resilience; dedicated caps for bio-applications are advised.
Where can I obtain the dimensional drawing and material certification?
Certified drawings and CoA documents are available upon request through Binzhenghong’s technical support portal (support@binzhenghong.com) with valid purchase order reference.