Raykol Auto EVA 12 Automated Quantitative Parallel Evaporator

Overview

The Raykol Auto EVA 12 Automated Quantitative Parallel Evaporator is an engineered solution for high-throughput, reproducible solvent removal in analytical laboratories. It operates on the principle of controlled nitrogen gas flow combined with uniform water bath heating—leveraging convective heat transfer and surface agitation to accelerate evaporation while preserving analyte integrity. Unlike passive evaporation or single-channel systems, the Auto EVA 12 employs a fixed-angle oblique nitrogen needle design that generates a continuous vortex at the liquid surface, reducing local vapor pressure and enhancing mass transfer efficiency. This dual-mode thermal–pneumatic approach ensures consistent evaporation kinetics across all 12 channels, minimizing inter-sample variability—a critical requirement for regulatory-compliant workflows in food safety, environmental monitoring, and pharmaceutical residue analysis.

Key Features

• 12-position parallel processing with independent optical level detection for each sample tube, enabling true unattended endpoint determination
• Precision temperature control (±0.1 °C) over a range of ambient to 60 °C via thermostatically regulated water bath, ensuring gentle yet effective heating for thermolabile compounds
• Adjustable nitrogen flow with real-time and gradient modes—automatically modulates gas delivery as sample volume decreases to maintain optimal surface turbulence and prevent splashing or foaming
• 10-inch integrated touchscreen interface supporting intuitive configuration of temperature setpoints, gas flow profiles, channel activation, and endpoint volume selection (0.5 mL or 1.0 mL)
• Triple-transparent viewing window with built-in LED illumination allows continuous visual verification of meniscus position and evaporation progress without opening the chamber
• Modular needle positioning system—horizontal and angular adjustment accommodates both 65 mL and 260 mL sample tubes, supporting diverse extraction protocols including QuEChERS, SPE, and LLE workflows
• Automated water bath maintenance functions: programmable drain/fill cycles reduce manual intervention and improve cross-experiment consistency

Sample Compatibility & Compliance

The Auto EVA 12 is validated for use with common organic solvents (e.g., acetonitrile, ethyl acetate, dichloromethane) and aqueous matrices encountered in multiresidue analysis. Its optical sensing mechanism is insensitive to solvent refractive index variations typical across method development stages. The system supports GLP- and GMP-aligned documentation practices through timestamped operation logs stored locally on the device controller. While not inherently 21 CFR Part 11 compliant out-of-the-box, its audit-trail-capable firmware architecture facilitates integration into validated laboratory information management systems (LIMS) when deployed with appropriate IT controls. The instrument meets IEC 61010-1 safety standards for laboratory electrical equipment and complies with ISO/IEC 17025 requirements for equipment suitability in accredited testing laboratories.

Software & Data Management

The embedded controller runs a deterministic real-time operating system optimized for sequential process execution. All user-defined methods—including temperature ramps, multi-stage gas flow profiles, and endpoint logic—are saved as encrypted binary files with version timestamps. Operation records include start/stop times, final volume confirmation, average evaporation rate per channel, and any deviation alerts (e.g., low water level, pressure drop). Export options include CSV-formatted reports compatible with Excel and LIMS ingestion protocols. No cloud connectivity or remote access capabilities are included, preserving data sovereignty in regulated environments where network segmentation is mandated.

Applications

The Auto EVA 12 serves as a core front-end tool in quantitative analytical pipelines requiring precise volume reduction prior to instrumental analysis. It is routinely deployed in: pesticide residue testing per EN 15662 and AOAC 2007.01; veterinary drug quantification in animal tissues following EU Commission Decision 2002/657/EC; polycyclic aromatic hydrocarbon (PAH) enrichment from drinking water per EPA Method 8270; mycotoxin cleanup in cereal extracts; and oligonucleotide desalting in biopharmaceutical QC labs. Its ability to maintain stoichiometric recovery across replicates makes it suitable for calibration standard preparation and reference material dilution series generation under ISO Guide 35 guidelines.

FAQ

What sample tube sizes does the Auto EVA 12 support?
It accommodates both 65 mL and 260 mL borosilicate glass tubes with conical or flat-bottom geometries, using mechanically adjustable needle mounts.
Can the endpoint volume be customized beyond 0.5 mL and 1.0 mL?
No—the optical sensor is factory-calibrated for two discrete endpoints only; custom thresholds would require hardware-level recalibration not supported in field operation.
Is external nitrogen supply pressure regulation required?
Yes—stable inlet pressure between 0.2–0.4 MPa is recommended; the instrument includes internal proportional flow control but relies on upstream pressure stabilization.
Does the system provide traceable temperature calibration certificates?
Calibration verification tools (e.g., NIST-traceable PT100 probe ports) are available as optional accessories; factory calibration reports are supplied with each unit.
How is water bath contamination mitigated during extended operation?
The auto-drain/fill function enables scheduled replacement of bath fluid; combined with the illuminated viewing window, this minimizes microbial growth risk and ensures thermal homogeneity over multi-day runs.