Anyan AYAN-DC25G Fully Enclosed Dry-Block Nitrogen Evaporator

Overview

The Anyan AYAN-DC25G Fully Enclosed Dry-Block Nitrogen Evaporator is an engineered solution for high-throughput, contamination-sensitive solvent removal in analytical laboratories. Unlike traditional water-bath nitrogen blow-down systems, this instrument employs a precisely temperature-controlled dry-block heating module—eliminating risks associated with water ingress, microbial growth, and cross-contamination from bath media. It operates on the principle of gentle, inert gas (N₂) sweep across sample surfaces under controlled thermal conditions, accelerating solvent evaporation while preserving thermolabile analytes. The system integrates a built-in nitrogen generator utilizing pressure-swing adsorption (PSA) technology—physically separating nitrogen from ambient air via carbon molecular sieves—ensuring continuous, oil-free, high-purity (>99.5%) N₂ supply without external gas cylinders or compressed air infrastructure. Designed for compliance-critical environments, it supports unattended operation during regulated sample preparation workflows in environmental testing, food safety analysis, clinical toxicology, and pharmaceutical QC.

Key Features

• 7-inch capacitive touchscreen interface with real-time display of critical parameters: block temperature, N₂ flow rate per channel, elapsed time, and system pressure.
• Dual-mode needle height adjustment: rapid coarse positioning and fine micrometer-scale vertical control—enabling precise tip-to-surface distance optimization for reproducible evaporation kinetics.
• Aerospace-grade aluminum heating block with optimized thermal mass and embedded Pt100 sensors—achieving uniform temperature distribution (±1 °C) across all 25 positions and rapid thermal response (≤15 min to 80 °C from ambient).
• Fully enclosed chamber with dual tempered-glass observation windows (front and side), drawer-style sample tray, and 360° visible sample wells—facilitating non-intrusive monitoring of liquid meniscus and endpoint detection.
• Integrated N₂ pre-heating module maintaining delivered gas at ~45 °C—reducing condensation on needle tips, minimizing analyte loss due to cold-trapping, and enhancing evaporation efficiency.
• Independent solenoid valve control per channel with digital flow regulation—ensuring consistent gas delivery, eliminating cross-channel pressure drift, and reducing overall N₂ consumption by up to 40% versus fixed-orifice systems.
• Double-seal door mechanism with recirculating laminar airflow and active exhaust management—containing volatile organic compounds (VOCs) and preventing laboratory ambient exposure per OSHA and EU Directive 2004/37/EC requirements.

Sample Compatibility & Compliance

The AYAN-DC25G accommodates standard 50 mL and 150 mL conical-bottom culture tubes, test tubes, and EPA-approved vials used in SW-846 Method 3510C, 3520C, and AOAC 2017.01 workflows. Its dry-block architecture eliminates aqueous medium-related interference, making it suitable for moisture-sensitive matrices including lipid extracts, pesticide residues in fatty foods, and steroid hormones in biological fluids. All wetted materials—including gas lines, valves, and needle guides—are constructed from chemically inert PTFE, stainless steel 316, and borosilicate glass. The system meets mechanical safety requirements per IEC 61010-1 and electromagnetic compatibility per EN 61326-1. While not certified to ISO/IEC 17025 or FDA 21 CFR Part 11 out-of-the-box, its audit-ready data logging (timestamped temperature/pressure/time records) and user-accessible calibration logs support GLP/GMP-aligned validation protocols.

Software & Data Management

The embedded firmware supports local storage of ≥100 method templates and ≥5000 runtime logs, each containing full parameter traceability: setpoint vs. actual temperature profiles, N₂ pressure curves, and cycle completion timestamps. Data export is available via USB 2.0 port in CSV format for integration into LIMS or ELN platforms. No cloud connectivity or remote access functionality is implemented—preserving data sovereignty and aligning with institutional IT security policies. Calibration verification routines are accessible through service mode, requiring administrator credentials. All stored data retain integrity during power interruption via non-volatile memory.

Applications

This evaporator is routinely deployed in accredited laboratories performing EPA Method 508.1 (chlorinated pesticides), EPA Method 8082A (PCBs), ISO 18363-1 (fatty acid methyl esters), and EN 15662 (pesticide multiresidue analysis in food). Its sealed design enables safe concentration of halogenated solvents (e.g., dichloromethane, hexane) without fume hood dependency—reducing facility HVAC load and enabling benchtop deployment in shared lab spaces. The dry-block configuration ensures compatibility with acidic or base-labile samples where water-bath pH shifts could induce degradation. It is also utilized in forensic toxicology for benzodiazepine extraction and in nutraceutical QA for carotenoid quantification in botanical oils.

FAQ

Does the AYAN-DC25G require external compressed air or nitrogen cylinders?

No—it incorporates an integrated PSA-based nitrogen generator with a built-in oil-free diaphragm compressor, capable of continuous 24/7 operation without external gas sources.
Can the heating block be replaced with alternative configurations (e.g., for smaller tubes)?

Yes—the modular aluminum block is field-replaceable; however, only manufacturer-supplied blocks calibrated for AYAN-DC25G’s thermal control algorithm are supported.
Is the nitrogen purity sufficient for GC-MS sample prep?

The generator delivers ≥99.5% N₂ with <10 ppm O₂ and <5 ppm H₂O—meeting ASTM D6624 specifications for carrier gas in trace-level chromatography.
How is temperature calibration verified?

Users may perform two-point verification using NIST-traceable PT100 probes inserted into designated calibration ports; deviation limits are ±0.5 °C at 40 °C and ±1.0 °C at 100 °C.
What maintenance intervals are recommended for optimal performance?

Desiccant cartridge replacement every 6 months, needle cleaning after each batch with HPLC-grade methanol, and visual inspection of O-rings and door seals quarterly.