Polytech EVA32 Nitrogen Evaporator

Overview

The Polytech EVA32 Nitrogen Evaporator is an engineered solution for high-throughput, solvent-free sample concentration in analytical laboratories. It operates on the principle of controlled nitrogen gas flow combined with precise conductive heating to gently and reproducibly remove volatile solvents from liquid samples—primarily prior to GC, HPLC, LC-MS, or ICP-MS analysis. Unlike open-air evaporation or traditional water bath nitrogen blow-down systems, the EVA32 integrates a fully enclosed chamber with patented oblique-angle gas delivery, minimizing turbulence-induced sample loss while maximizing surface-area exposure per vial. Its sealed architecture eliminates reliance on fume hoods, reducing lab infrastructure dependency and operator exposure to organic vapors—supporting compliance with OSHA 29 CFR 1910.1200 (Hazard Communication) and EU Directive 2004/37/EC (carcinogens/mutagens). Designed for routine QC, environmental testing, food safety, and clinical research workflows, the EVA32 delivers consistent endpoint reproducibility across 32 parallel samples without cross-contamination risk.

Key Features

• Patented oblique gas delivery system: Angled nitrogen nozzles increase effective evaporation surface area by up to 40% versus vertical blow-down, accelerating concentration kinetics while reducing total gas consumption by ~25% (measured at standard 10–15 L/min per channel).
• Four independently programmable gas channels: Each controls flow rate (0–15 L/min), temperature (room temp to 120 °C), and timing—enabling heterogeneous sample sets (e.g., varying solvent boiling points or volumes) to be processed simultaneously under optimized conditions.
• Modular, cleanable nozzle assembly: Stainless-steel nozzles are tool-free detachable; compatible with 1.5 mL, 2 mL, 15 mL, and 50 mL conical or round-bottom centrifuge tubes via adjustable height and tilt-angle positioning.
• Double-sided tempered glass viewing window with RGB status illumination: Real-time visual monitoring of sample volume reduction; color-coded LED feedback (blue = standby, green = active, amber = low-volume alert, red = endpoint or fault).
• Integrated safety logic: Lid-open detection triggers immediate gas shutoff and heater deactivation; automatic resume upon lid closure preserves method continuity without manual re-initiation.
• 7-inch capacitive LED touchscreen interface: Graphical method editor supports multi-step protocols (e.g., ramped temperature + stepped flow profiles); real-time display includes remaining time, current temperature, actual flow rate, and individual vial status icons.

Sample Compatibility & Compliance

The EVA32 accommodates standard microcentrifuge tubes (1.5–2 mL), culture tubes (15 mL), and wide-mouth centrifuge tubes (50 mL) without adapters. Tube holders are chemically resistant (PP/PE-coated stainless steel) and autoclavable. All wetted materials comply with USP Class VI biocompatibility requirements. The unit meets IEC 61010-1:2010 for laboratory electrical equipment safety and incorporates electromagnetic compatibility per EN 61326-1:2013. While not certified for Class I Div 1 hazardous locations, its sealed chamber design and lack of ignition sources make it suitable for use with flammable solvents under general lab ventilation (per NFPA 45 guidelines). Data audit trails and user-access logs support GLP/GMP alignment when paired with validated SOPs.

Software & Data Management

The embedded firmware stores up to 100 user-defined methods with timestamps, operator ID fields, and version history. All run records—including start/stop times, setpoints, deviations >±2 °C or >±1 L/min, and lid-open events—are exportable via USB-C to CSV. No cloud connectivity or remote access is implemented, preserving data sovereignty. Audit trail functionality satisfies FDA 21 CFR Part 11 requirements when used with institutional electronic signature policies (e.g., dual-operator confirmation for method changes). Firmware updates are performed offline via encrypted USB drive with SHA-256 integrity verification.

Applications

• Residue analysis: Pesticide multiresidue screening (EN 15662), veterinary drug residues (EU 2021/808), and mycotoxin cleanup in food/feed matrices.
• Environmental testing: PAHs, PCBs, and organochlorine pesticides in soil/sediment extracts (EPA Methods 3510C, 3520C).
• Clinical toxicology: Benzodiazepines, opioids, and stimulants in urine/plasma prior to derivatization and GC-MS analysis.
• Pharmaceutical impurity profiling: Residual solvents (ICH Q3C) and extractables/leachables in drug product stability studies.
• Forensic toxicology: High-throughput blood alcohol and drug screening workflows requiring strict chain-of-custody documentation.

FAQ

Does the EVA32 require external exhaust ducting?

No—its integrated activated carbon filter and recirculating airflow system enable safe operation outside fume hoods.
Can I validate temperature uniformity across all 32 positions?

Yes—NIST-traceable PT100 probes can be inserted into designated calibration ports; uniformity is ±0.8 °C at 60 °C (per internal IQ/OQ protocol).
Is the gas flow rate calibrated per channel?

Each channel features a mass flow controller (MFC) factory-calibrated against a primary standard (±1.5% FS accuracy); recalibration is recommended annually.
What maintenance intervals are specified?

Nozzle cleaning after every 10 runs; carbon filter replacement every 6 months or 500 hours; full preventive maintenance (heater resistance check, seal integrity test) every 12 months.
Is third-party software integration supported?

No native API or DLL libraries are provided; however, CSV exports are structured for direct ingestion into LIMS platforms (e.g., LabWare, Thermo SampleManager) via scheduled import scripts.