Chu Ding Technology DN-24W 24-Position Water Bath Nitrogen Evaporator

Overview

The Chu Ding Technology DN-24W is a precision-engineered 24-position water bath nitrogen evaporator designed for reliable, reproducible solvent removal in analytical sample preparation workflows. It operates on the principle of gentle, inert gas-assisted evaporation—introducing controlled streams of nitrogen directly above liquid surfaces within sample vessels while maintaining precise thermal regulation via a uniform water bath. This method minimizes thermal degradation, prevents oxidation of labile analytes, and eliminates the risk of bumping or splashing associated with vacuum or open-flame concentration techniques. Engineered for integration into regulated laboratory environments—including QC/QA labs in pharmaceutical, environmental, forensic, and agrochemical sectors—the DN-24W supports standardized protocols aligned with ASTM D7066 (for pesticide residue analysis), USP , and ISO 17025-compliant sample handling procedures.

Key Features

• 24 independently adjustable stainless-steel gas nozzles with individual flow control—ensuring zero cross-contamination between samples and enabling method-specific optimization per position.
• High-uniformity water bath heating system with PID-controlled temperature regulation; achieves ±0.2 °C accuracy across the full 0–100 °C operating range, verified by integrated PT100 sensor feedback.
• Robust aluminum alloy housing with corrosion-resistant coating and optimized thermal insulation—designed for continuous operation at elevated temperatures without drift or fatigue.
• Intuitive digital LED interface displaying real-time bath temperature and setpoint; memory function retains last-used parameters after power cycling.
• Gas pressure monitoring circuitry limits inlet pressure to <0.6 MPa, safeguarding tubing integrity and ensuring consistent laminar flow dynamics over extended runs.
• Compact footprint (310 × 220 × 420 mm) and lightweight design (~5 kg) facilitate placement on fume hoods, benchtops, or mobile carts without structural reinforcement.

Sample Compatibility & Compliance

The DN-24W accommodates standard 16 mm OD glass or polypropylene tubes, centrifuge tubes (e.g., 15 mL conical), and crimp-top vials commonly used in LC-MS, GC-MS, and ICP-MS sample prep. Optional custom adapters support alternative diameters (10–20 mm) upon request. All wetted components comply with USP Class VI biocompatibility standards. The instrument meets CE marking requirements for electromagnetic compatibility (EN 61326-1) and low-voltage safety (EN 61010-1). Its operational stability and traceable temperature calibration support GLP/GMP documentation needs, including audit-ready calibration logs and deviation reporting when paired with external validation thermometers.

Software & Data Management

While the DN-24W operates as a standalone analog-digital hybrid unit without embedded PC connectivity, its temperature setpoint and status indicators are fully compatible with third-party laboratory information management systems (LIMS) via optional RS-232 or USB-to-serial interface modules (sold separately). Calibration certificates—including as-found/as-left data and uncertainty budgets—can be generated using NIST-traceable reference thermometers. For FDA 21 CFR Part 11 compliance, users may integrate the device into validated workflows using electronic lab notebooks (ELNs) that capture operator ID, timestamped start/stop events, and manual entry of bath temperature logs.

Applications

• Routine concentration of extracts prior to HPLC or GC injection in environmental testing (e.g., EPA Method 525.3 for drinking water contaminants).
• Pre-concentration of biological matrices—including plasma, urine, and tissue homogenates—for targeted metabolomics and pharmacokinetic studies.
• Residue analysis in food safety labs following AOAC Official Method 2007.01 (multi-residue pesticide screening).
• Forensic toxicology sample cleanup, particularly for volatile organic compounds requiring oxygen-free evaporation conditions.
• Method development and validation where inter-batch consistency and thermal homogeneity are critical performance criteria.

FAQ

Is the DN-24W suitable for use with flammable solvents such as hexane or ether?

Yes—provided proper ventilation (e.g., fume hood operation) and nitrogen purity ≥99.999% are maintained to eliminate ignition risk. The water bath design inherently suppresses vapor accumulation.
Can the instrument maintain temperature uniformity across all 24 positions simultaneously?

Yes—the circulating water bath architecture and symmetrical heater placement ensure ≤0.3 °C spatial variation across the entire block, confirmed during factory performance qualification.
Does the DN-24W include a built-in gas flow meter?

No—gas flow is regulated externally using a calibrated mass flow controller or needle valve; this allows flexibility for method-specific flow rates (typically 0.5–2 L/min per channel).
What maintenance is required for long-term reliability?

Monthly descaling of the water bath with 10% acetic acid solution and annual verification of temperature sensor linearity using a certified reference thermometer.
Is technical support available outside mainland China?

Yes—Chu Ding Technology provides remote diagnostics and English-language application engineering support through authorized regional distributors in APAC, EMEA, and North America.