Polytech EVA08 Automated Quantitative Nitrogen Evaporator
| Brand | Polytech |
|---|---|
| Origin | Anhui, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Country of Origin | China |
| Model | EVA08 |
| Pricing | Available upon Request |
Overview
The Polytech EVA08 Automated Quantitative Nitrogen Evaporator is an engineered solution for precise, reproducible solvent removal in analytical laboratory workflows. Designed around controlled nitrogen gas dispersion and real-time liquid-level monitoring, the EVA08 implements a dual-needle coaxial gas delivery system to optimize evaporation kinetics while minimizing sample cross-contamination and analyte loss. Unlike passive nitrogen blow-down systems, the EVA08 integrates programmable pressure ramping, independent channel control, and endpoint detection via optical or capacitive liquid-level sensing—enabling true unattended operation for up to eight samples simultaneously. Its architecture supports quantitative concentration to user-defined residual volumes (0.5 mL or 1.0 mL), making it suitable for applications requiring strict volume recovery compliance, such as residue analysis per ISO 17025-accredited methods or regulated environmental testing protocols.
Key Features
- Independent pneumatic and thermal control per channel ensures consistent evaporation kinetics across all eight positions
- Dual concentric needle design delivers laminar nitrogen flow directly above the liquid surface, reducing splashing and volatile compound loss
- Two operational modes: liquid-level-sensing termination (for volumetric precision) and dry-endpoint detection (for complete solvent removal)
- Programmable pressure ramping enables gradual nitrogen flow increase—critical for heat-sensitive analytes and viscous matrices
- Motorized vertical needle positioning with auto-retract function upon lid opening; no manual adjustment required
- Tool-free, modular gas nozzle assembly allows rapid cleaning and replacement without calibration recalibration
- Integrated LED status indicators provide at-a-glance visual feedback on run progress, channel activity, and fault conditions
- Ergonomic lid suspension mechanism holds the cover open at 90° for safe, hands-free tube access during loading/unloading
- Maximum single-sample capacity ≥200 mL, compatible with standard 50 mL centrifuge tubes and custom-format vials
Sample Compatibility & Compliance
The EVA08 accommodates a broad range of sample containers—including conical-bottom glass tubes, polypropylene centrifuge vials, and screw-cap autosampler vials—without adapter modification. Its low-temperature nitrogen delivery (ambient to 40 °C optional heating block) preserves thermolabile compounds common in pesticide residue, mycotoxin, and veterinary drug analyses. The instrument meets mechanical safety requirements per IEC 61010-1 and electromagnetic compatibility standards EN 61326-1. While not certified for use in Class I Div 1 hazardous locations, its sealed gas manifold and leak-tested fittings comply with general laboratory ventilation best practices outlined in ANSI Z9.5. Data integrity features—including timestamped run logs and operator ID tagging—are configurable to support GLP and GMP environments where audit trails are mandated under FDA 21 CFR Part 11.
Software & Data Management
The EVA08 operates via embedded firmware with a tactile LCD interface and intuitive menu navigation—no external PC required for routine operation. All method parameters (gas pressure profile, target volume, dwell time, temperature setpoint) are stored locally with version-controlled method recall. Optional USB export enables transfer of run metadata (start/stop timestamps, channel-specific pressure curves, endpoint confirmation flags) to LIMS or ELN platforms. Audit trail functionality records operator login events, parameter changes, and emergency stop triggers with immutable timestamps—supporting traceability requirements for ISO/IEC 17025 Clause 7.7 and EU Annex 11 computerized system validation.
Applications
The EVA08 is routinely deployed in food safety laboratories performing multi-residue pesticide screening (AOAC 2007.01, EN 15662), environmental labs quantifying PAHs and PCBs in soil extracts (EPA Method 3510C, ISO 18238), and agricultural research facilities analyzing plant growth regulators and herbicide metabolites. Its ability to maintain consistent final volumes across heterogeneous sample matrices makes it particularly valuable for LC-MS/MS sample prep workflows where injection volume precision directly impacts signal-to-noise ratio and calibration linearity. Regulatory-compliant labs utilize its programmable endpoint logic to satisfy volume tolerance thresholds specified in USP , EP 2.2.46, and Chinese Pharmacopoeia Volume IV.
FAQ
Does the EVA08 require external software or a computer to operate?
No—the instrument runs fully autonomously using onboard firmware; a PC is only needed for optional data export via USB.
Can the EVA08 be integrated into automated sample preparation lines?
Yes, it supports dry-contact relay outputs for start/stop signaling and RS-232 communication for basic command integration with third-party automation controllers.
Is calibration of the liquid-level sensor required by the user?
No—factory-calibrated optical sensors are sealed and non-adjustable; verification is performed during annual preventive maintenance.
What types of solvents are compatible with the EVA08’s gas delivery system?
All common organic solvents (e.g., acetonitrile, methanol, ethyl acetate, hexane) and aqueous buffers; chlorinated solvents require optional corrosion-resistant fittings.
How is overpressure protection implemented?
A redundant mechanical pressure relief valve (set at 0.4 MPa) and digital pressure cutoff (configurable up to 0.35 MPa) prevent system overpressurization.
