Chengmeng CM-24PUS Automated Nitrogen Evaporator

Overview

The Chengmeng CM-24PUS Automated Nitrogen Evaporator is an engineered solution for high-throughput, reproducible solvent removal in analytical laboratories. It operates on the principle of inert gas-assisted evaporation—introducing precisely regulated nitrogen flow across the surface of heated liquid samples to accelerate solvent volatilization while minimizing analyte degradation or oxidation. Unlike open-vessel evaporation or rotary evaporation, this system employs a water-bath-heated platform combined with vortex-rotating nitrogen delivery, ensuring uniform thermal transfer and enhanced surface agitation without splashing or cross-contamination. Designed for integration into GC, LC, and LC-MS sample preparation workflows, the CM-24PUS supports quantitative concentration down to user-defined end points (0.1 mL near-dry, 0.5 mL, or 1.0 mL), making it suitable for residue analysis, environmental testing, pharmaceutical QA/QC, and clinical toxicology.

Key Features

• PID-controlled water bath with ±0.5 °C temperature stability across 0–100 °C range, ensuring consistent thermal conditions for thermolabile compounds.
• Vortex-rotating nitrogen delivery system increases effective surface area exposure and improves evaporation efficiency while preventing droplet ejection.
• Optical fiber-based endpoint detection enables precise, non-contact volume sensing at 0.5 mL and 1.0 mL thresholds; configurable near-dry mode (~0.1 mL) via extended timing.
• 24-position parallel processing capability with modular electromagnetic valve control—individual channel activation/deactivation allows mixed-volume, mixed-solvent runs without cross-interference.
• Integrated 8-inch high-resolution touchscreen interface (800×480) with dual-language support (English/Chinese), real-time display of bath temperature, nitrogen pressure, elapsed time, and active channel status.
• Comprehensive safety architecture: low-water-level sensor, over-temperature cutoff, dry-run prevention, automatic drain module, and audible/visual alarms for all critical fault conditions.
• Stainless-steel water bath chamber with corrosion-resistant finish and wide-curved front viewing window—enables uninterrupted visual monitoring during operation without interrupting heating or gas flow.
• Flexible power configuration (220 V/110 V, 50 Hz) and robust 2200 W heating capacity ensure stable performance under variable laboratory infrastructure conditions.

Sample Compatibility & Compliance

The CM-24PUS accommodates standard concentric vials (15–150 mL), test tubes, and custom-format containers within its 1–200 mL volume range. Its modular positioning system permits simultaneous use of different vessel sizes and chemistries—ideal for labs handling diverse matrices (e.g., plasma extracts, soil leachates, pesticide standards). The instrument complies with general laboratory safety requirements per IEC 61010-1 and meets electromagnetic compatibility standards EN 61326-1. While not certified for GMP/GLP environments out-of-the-box, its audit-ready features—including timestamped event logging, operator ID tagging (via optional network integration), and deterministic endpoint triggering—support alignment with FDA 21 CFR Part 11 when deployed with validated software protocols and procedural controls.

Software & Data Management

The embedded control firmware provides local data persistence for up to 100 method templates, each storing temperature ramp profiles, gas pressure setpoints, timer durations, and endpoint criteria. All operational events—including start/stop timestamps, alarm triggers, manual overrides, and sensor readings—are logged internally with UTC synchronization. Export is supported via USB 2.0 to CSV format for traceability and LIMS integration. Optional Ethernet/Wi-Fi modules enable remote monitoring and centralized fleet management in multi-instrument labs. No cloud dependency or proprietary subscription is required; raw logs retain full fidelity for internal validation or regulatory review.

Applications

• Residue analysis in food and agricultural commodities (e.g., pesticide multiresidue methods per AOAC 2007.01 and EN 15662).
• Pharmaceutical impurity profiling requiring quantitative recovery from extraction solvents prior to HPLC or GC injection.
• Environmental monitoring of PAHs, PCBs, and organochlorines in water, sediment, and biota extracts.
• Clinical toxicology workflows involving urine or blood specimen cleanup prior to immunoassay or mass spectrometry.
• Forensic drug screening where reproducible solvent removal is critical for calibration standard preparation and QC sample generation.

FAQ

What sample volumes can the CM-24PUS handle per tube?
It supports individual sample volumes from 1 mL to 200 mL, with optimal performance observed between 5 mL and 100 mL depending on solvent volatility and target endpoint.
Is the nitrogen flow rate adjustable per channel?
No—flow is uniformly distributed across active channels via precision-engineered orifices and regulated by total system pressure; however, individual channel on/off control is fully programmable.
Can the unit operate unattended overnight?
Yes, provided ambient conditions remain within specification (15–35 °C, 45–80% RH) and sufficient water volume is maintained; all safety interlocks remain active during timed operation.
Does it support third-party nitrogen generators?
Yes—the input pressure range (7–145 psi) accommodates most laboratory-grade nitrogen generators; output regulation (0–72.5 psi) ensures compatibility with standard lab gas manifolds.
How is calibration verified?
Temperature calibration is performed using NIST-traceable RTD probes; pressure transducers are factory-calibrated and field-verifiable with external gauges—full calibration documentation is supplied with each unit.