MILESTONE ETHOS UP Microwave Digestion and Extraction System

Overview

The MILESTONE ETHOS UP Microwave Digestion and Extraction System is an industrial-grade platform engineered for high-throughput, high-pressure sample preparation in analytical laboratories. It operates on the principle of controlled microwave energy absorption by polar molecules (e.g., H₂O, HNO₃, HCl) within sealed reaction vessels, enabling rapid, uniform heating under inert or oxidizing atmospheres. Unlike conventional hotplate digestion, the ETHOS UP delivers precise thermal energy directly to the sample matrix—minimizing reagent consumption, reducing blank contributions, and suppressing volatile element loss. Its dual-magnetron configuration ensures symmetrical power distribution across the cavity, critical for reproducible heating of up to 44 samples simultaneously. Designed for compliance-driven environments—including environmental testing labs, geochemical analysis, clinical toxicology, and regulatory pharmaceutical QA/QC—the system supports method development and routine operation under ISO/IEC 17025, ASTM D5511, EPA Methods 3015A, 3051A, and 3052, as well as USP and for elemental impurities.

Key Features

• Industrial-class microwave cavity constructed from monolithic cast aluminum with reinforced stainless-steel inner lining—ensuring structural integrity, electromagnetic shielding, and long-term resistance to acid corrosion.
• Self-sealing, motorized stainless-steel safety door with integrated pressure interlock and redundant mechanical latches—designed to meet EN 61000-6-3 and IEC 61000-4-3 EMC standards.
• Real-time, per-vessel temperature and pressure monitoring via fiber-optic sensors and piezoresistive transducers—enabling dynamic power modulation and automatic hold-to-target control.
• Ultra-low microwave leakage (<0.05 mW/cm² at 5 cm), compliant with ICNIRP exposure limits and exceeding national safety thresholds by two orders of magnitude.
• High-capacity rotor supporting up to 44 × 100 mL high-pressure quartz or PTFE-TFM vessels—optimized for large-mass samples (e.g., soils, sediments, biological tissues) requiring elevated temperature (up to 320 °C) and pressure (up to 2200 psi) conditions.
• Dual independent magnetrons (each 1.0 kW nominal output) with phase-synchronized emission—delivering stable, scalable power from 0–2000 W in 1 W increments for fine-grained method optimization.

Sample Compatibility & Compliance

The ETHOS UP accommodates a broad spectrum of solid and semi-solid matrices, including but not limited to soil, sludge, plant tissue, animal feed, polymer composites, catalysts, and pharmaceutical excipients. Its high-pressure capability enables complete dissolution of refractory silicates and aluminosilicates using HF-containing reagent mixtures—while maintaining trace-level recoveries of As, Cd, Cr, Pb, and Hg per EPA Method 6020B. All vessel configurations comply with ISO 17034 for certified reference material use and support GLP/GMP audit trails when paired with validated software protocols. The system meets CE marking requirements under Directive 2014/30/EU (EMC) and 2014/35/EU (LVD), and its safety architecture aligns with IEC 61010-1:2010 for laboratory equipment.

Software & Data Management

ETHOS UP is operated via Milestone’s dedicated MultiWave PRO software—a Windows-based application supporting method creation, execution logging, and electronic record retention. The software enforces user role-based access control (RBAC), provides time-stamped audit trails for all parameter changes, and exports raw sensor data in CSV and XML formats compatible with LIMS integration. It supports 21 CFR Part 11-compliant electronic signatures when deployed with optional PKI certificate authentication and encrypted database storage. Preloaded method libraries include standardized protocols for food, environmental, and clinical applications—with customizable ramp/hold profiles, power gradients, and safety-triggered emergency venting sequences.

Applications

• Multi-element analysis by ICP-OES and ICP-MS following EPA 6020B and ISO 17294-2.
• Heavy metal quantification in consumer products per CPSIA and RoHS directives.
• Pharmaceutical elemental impurity testing aligned with ICH Q3D and USP chapters , , and .
• Geochemical digestion of NIST SRMs and CRM-certified rock powders.
• Extraction of persistent organic pollutants (POPs) and pesticides from biota using microwave-assisted solvent extraction (MASE) protocols.
• Preparation of nanomaterial suspensions for size and zeta potential characterization.

FAQ

What safety certifications does the ETHOS UP hold?

The system complies with IEC 61010-1:2010, carries CE marking under EU Low Voltage and EMC Directives, and meets ISO 13857 mechanical safety requirements for access zones.
Can the ETHOS UP be integrated into a fully automated lab workflow?

Yes—via RS-232, USB, and Ethernet interfaces, it supports remote start/stop, status polling, and error reporting for integration with robotic sample handlers and LIMS platforms.
Is HF digestion supported, and what vessel materials are recommended?

HF-compatible digestion is enabled using Milestone’s proprietary quartz or TFM-PTFE vessels rated for 320 °C and 2200 psi; quartz vessels require optional HF-resistant sensor sleeves.
How is temperature uniformity verified across all 44 positions?

Uniformity is validated per ASTM E2500 using calibrated fiber-optic probes placed in representative vessel locations during factory acceptance testing; typical deviation is ≤±2.5 °C at 300 °C.
Does the system support method transfer from older ETHOS models?

Yes—MultiWave PRO includes backward-compatible method import tools and auto-conversion logic for ETHOS Classic and ETHOS ONE protocols.