Chengmeng CM-96 Dual-Position 96-Well Plate Nitrogen Evaporator

Overview

The Chengmeng CM-96 Dual-Position 96-Well Plate Nitrogen Evaporator is an engineered solution for high-throughput, reproducible solvent removal from microplate-based samples. Unlike conventional block-heated evaporators that rely solely on conductive heat transfer—inefficient for low-thermal-conductivity polymer plates—the CM-96 integrates direct nitrogen gas heating with precision dry-block thermal control. This hybrid approach delivers rapid, uniform thermal energy delivery across all 96 wells simultaneously, minimizing inter-well variability and reducing total evaporation time by up to 40% compared to single-channel or bath-based systems. The instrument operates on the principle of forced convective evaporation: heated, filtered nitrogen is delivered via independently regulated nozzles positioned above each well, ensuring laminar, oxygen-free airflow that prevents oxidation and analyte degradation. Designed for compliance-critical workflows, the CM-96 supports trace-level residue analysis where consistency, repeatability, and minimal sample handling are essential—particularly in regulated environments requiring documented thermal profiles and process control.

Key Features

• Dual independent 96-well positions enable parallel processing of two standard SBS-format microplates, doubling throughput without compromising control fidelity.
• Motorized vertical lift system with push-button actuation ensures precise, repeatable nozzle-to-plate distance adjustment (range: 0–60 mm), accommodating varying plate heights including skirted, semi-skirted, and low-profile formats.
• Color TFT touchscreen interface provides intuitive programming of temperature setpoint (0–80 °C), run duration (0–999 min), and real-time monitoring of actual block temperature and gas flow status.
• Independent dual-channel mass flow control allows differential nitrogen delivery per plate—critical when processing heterogeneous sample sets with divergent volatility profiles.
• Aluminum heating block with sandblasted anodized surface ensures optimal thermal coupling with polypropylene and polyethylene plates while resisting corrosion from organic solvents.
• Modular needle holder assembly permits rapid disassembly for cleaning or replacement; all gas pathways use chemically resistant PU tubing with thermal insulation sheathing.
• Integrated safety logic includes overtemperature cutoff, gas-flow loss detection, and automatic shutdown upon lid opening or power interruption.

Sample Compatibility & Compliance

The CM-96 is validated for use with ANSI/SBS-standard 96-well plates fabricated from polypropylene (PP), polyethylene (PE), and polystyrene (PS), including deep-well, shallow-well, PCR, and assay-specific configurations. Its non-contact nitrogen delivery eliminates cross-contamination risks inherent in shared manifold systems, supporting GLP-compliant residue analysis workflows. While not certified to IEC 61010-1 or ISO/IEC 17025 out-of-the-box, the instrument’s deterministic thermal behavior, digital audit trail (via optional USB data logging), and programmable parameter locking align with core requirements of FDA 21 CFR Part 11 Annex 11 for electronic records in regulated laboratories. It meets ASTM D5845-18 guidelines for pesticide residue preparation and supports method validation per ISO 17025:2017 clause 7.2.2 (method selection and verification).

Software & Data Management

The CM-96 operates as a standalone instrument with embedded firmware; no external PC or proprietary software is required for basic operation. All user-defined parameters—including temperature setpoint, dwell time, and gas flow rate—are stored in non-volatile memory with timestamped execution logs accessible via USB export (CSV format). Optional firmware upgrades may introduce enhanced data integrity features such as password-protected parameter editing, operator ID tagging, and electronic signature prompts for critical method changes—features aligned with ALCOA+ data governance principles. For integration into LIMS or ELN ecosystems, the device supports RS-232 serial output (ASCII protocol) for remote status polling and event-triggered notifications.

Applications

• Agricultural Residue Analysis: High-throughput cleanup of QuEChERS extracts from fruits, vegetables, cereals, and tobacco prior to GC-MS or LC-MS/MS quantification.
• Food Safety Testing: Concentration of mycotoxin, veterinary drug, and adulterant residues in milk, wine, juice, and infant formula matrices.
• Environmental Monitoring: Pre-concentration of water samples (drinking, wastewater, groundwater) for PAHs, PCBs, and organochlorine pesticides per EPA Method 525.3 and ISO 10392.
• Clinical & Forensic Toxicology: Solvent removal from serum, plasma, urine, and oral fluid extracts prior to immunoassay or HRAM-MS confirmation.
• Pharmaceutical Development: Parallel concentration of combinatorial library fractions, dissolution samples, and stability-indicating assay preparations under inert atmosphere.

FAQ

Does the CM-96 support unattended overnight operation?
Yes—programmable timer with auto-shutdown, thermal runaway protection, and gas-flow monitoring enable secure extended runs. We recommend validating run stability for >8 h using representative solvent loads.
Can I use compressed air instead of nitrogen?
No. Air introduces oxygen and moisture, risking oxidation of labile analytes (e.g., lipids, catecholamines) and inconsistent evaporation kinetics. Only high-purity nitrogen (≥99.995%) is recommended.
Is calibration traceable to NIST standards?
The unit includes a factory-calibrated PT100 sensor. Users may perform field verification using a calibrated reference thermometer per ISO/IEC 17025 Section 6.6; certificate of conformance is provided with shipment.
What maintenance is required?
Quarterly inspection of gas fittings, annual cleaning of needle orifices with methanol and ultrasonic bath, and biannual verification of temperature uniformity across the block using a 96-point thermal mapping probe.
How does the CM-96 compare to vortex-assisted or centrifugal evaporators?
Unlike rotary or centrifugal systems, the CM-96 preserves sample integrity in fragile biological matrices (e.g., exosomes, protein digests) without shear stress or foaming, while offering superior well-to-well reproducibility than open-bench nitrogen manifolds.