Truelab MTN-2800W Water Bath Nitrogen Evaporator (12/24/40-Position)

Overview

The Truelab MTN-2800W Water Bath Nitrogen Evaporator is an engineered solution for controlled, gentle solvent removal in analytical sample preparation workflows. It operates on the principle of inert gas displacement—introducing a laminar, low-velocity stream of nitrogen across the surface of liquid samples immersed in a precisely regulated water bath. This configuration minimizes thermal degradation and oxidation risk while enabling uniform heat transfer via conduction through the water medium. Unlike dry-block or air-heated evaporators, the water bath design ensures exceptional temperature homogeneity (±0.1°C stability) and eliminates localized hot spots, making it especially suitable for thermolabile analytes in LC-MS, GC-MS, and HPLC sample cleanup protocols. The instrument supports three standardized configurations—12-, 24-, and 40-position formats—allowing scalability from small-batch QC validation to high-throughput environmental or clinical screening laboratories.

Key Features

• 70 mm-thick aluminum heating block immersed in thermostatically controlled water bath, ensuring minimal axial and radial thermal gradients across all sample positions
• Independent gas flow control per channel via precision needle valves; total flow range 0–10 L/min with fine adjustment capability
• Dual digital LED displays: simultaneous readout of set temperature / actual bath temperature, and programmed timer / real-time countdown
• Programmable timer with extended range (10 minutes to 99 hours, 59 minutes), supporting both fixed-duration evaporation and continuous operation modes
• Over-temperature safety cutoff triggered at setpoint + 5°C, plus independent hardware-based thermal fuse for fail-safe protection
• Modular tube holder assembly enables rapid insertion/removal of sample racks without disturbing bath level or temperature equilibrium
• Rugged stainless-steel housing with corrosion-resistant interior finish, designed for long-term operation at sustained 95–100°C bath temperatures

Sample Compatibility & Compliance

The MTN-2800W accommodates standard borosilicate glass test tubes (10–15 mm OD), including 13 × 100 mm, 16 × 150 mm, and 18 × 150 mm formats. Its water bath geometry maintains consistent immersion depth across all positions, reducing inter-vial evaporation rate variance. The system complies with GB/T 26572–2011 for electrical safety in laboratory environments and meets RoHS Directive 2011/65/EU requirements for hazardous substance restriction. While not certified to ISO/IEC 17025 or GLP-specific hardware standards, its stable thermal performance and programmable timing functionality support adherence to method-defined parameters in USP , EPA Method 502.2, and ASTM D7066–18 sample concentration procedures. Traceable calibration reports for temperature and timer functions may be generated using external NIST-traceable references.

Software & Data Management

The MTN-2800W is a standalone benchtop instrument with no embedded microprocessor or network interface. All operational parameters—including temperature setpoint, timer duration, and mode selection—are configured manually via front-panel membrane switches. No proprietary software, drivers, or cloud connectivity are required or supported. This architecture ensures deterministic behavior, eliminates firmware update dependencies, and simplifies qualification under FDA 21 CFR Part 11 Annex 11 environments where audit trails and electronic signature requirements apply. Users maintain full control over data integrity by recording operating conditions directly in lab notebooks or LIMS-integrated electronic records.

Applications

• Concentration of pesticide residues in food extracts prior to GC-ECD or LC-MS/MS analysis
• Preparative cleanup of pharmaceutical impurity standards following solid-phase extraction (SPE)
• Reduction of solvent volume in environmental water samples containing PAHs, PCBs, or organochlorine pesticides
• Stabilization of unstable metabolites during bioanalytical method development
• Removal of acetonitrile or methanol from plasma protein precipitation supernatants
• Standardization of calibration stock solutions requiring precise final volume definition

FAQ

Is the MTN-2800W compatible with nitrogen generators?
Yes—the inlet accepts standard 6 mm OD tubing and operates within 0–10 L/min flow range, matching output specifications of most laboratory-grade nitrogen generators.
Can I use organic solvents other than methanol or acetonitrile?
The water bath design is compatible with aqueous and polar organic mixtures; however, low-boiling solvents (e.g., diethyl ether, chloroform) require strict fume hood ventilation and reduced bath temperature settings to prevent rapid vaporization and splashing.
Does the unit include a nitrogen pressure regulator?
No—a dedicated external regulator (0–100 psi range) and inline particulate filter are recommended for optimal flow control and gas purity.
What maintenance is required for long-term reliability?
Daily draining and refilling of distilled water prevents mineral buildup; quarterly inspection of O-rings and valve seats is advised. No lubrication or internal calibration is necessary.
Is the heating block removable for cleaning?
The aluminum block is permanently affixed to the bath chamber but accessible for wiping with non-abrasive cloths; water bath reservoir is fully drainable via bottom valve.