Tongtai Union TTL-DCIII Nitrogen Evaporator

Overview

The Tongtai Union TTL-DCIII Nitrogen Evaporator is an engineered solution for gentle, reproducible solvent removal from multiple liquid samples under controlled thermal and gaseous conditions. Designed around the principle of inert gas-assisted surface evaporation, it utilizes precisely regulated nitrogen (or compressed air) flow directed onto sample surfaces in combination with uniform water-bath heating to accelerate solvent volatilization while minimizing analyte degradation, oxidation, or cross-contamination. Unlike dry-block or infrared-based evaporators, the TTL-DCIII’s water-bath architecture ensures exceptional temperature homogeneity across all 36 sample positions—critical for quantitative applications in environmental analysis, clinical toxicology, food safety testing, and pharmaceutical residue screening where thermal consistency directly impacts recovery efficiency and method robustness.

Key Features

• Independent gas flow control per needle via precision needle valves—enabling method-specific optimization for diverse sample matrices and solvents.
• Motorized vertical lift mechanism (travel: 100 ± 2 mm) for both sample rack and gas distribution manifold—reducing manual handling, improving ergonomics, and ensuring repeatable positioning during setup and retrieval.
• Modular split design: thermally isolated water bath vessel and electronic control unit—extending service life of sensitive components and simplifying maintenance access.
• Quick-release stainless-steel gas needles with PTFE-coated tips—resistant to corrosion from acidic, alkaline, or organic solvents; compatible with routine autoclaving or ultrasonic cleaning.
• Individually adjustable height for each gas needle—accommodating varying container geometries (e.g., conical vials, centrifuge tubes, beakers) without compromising laminar gas impingement.
• Integrated digital gas flow meter with needle valve—displaying total volumetric consumption in real time, supporting gas usage tracking and cost accountability in high-throughput labs.
• Internally routed nitrogen supply lines—eliminating external tubing clutter and reducing risk of kinking, leakage, or accidental disconnection during operation.
• Stainless-steel bath chamber with PTFE-coated interior surfaces—providing chemical resistance against HCl, NaOH, acetonitrile, methanol, and other aggressive reagents commonly used in extraction workflows.

Sample Compatibility & Compliance

The TTL-DCIII accommodates standard laboratory vessels ranging from 10 mm to 29 mm in outer diameter—including 1.5 mL and 2.0 mL microcentrifuge tubes, 15 mL and 50 mL conical tubes, 50 mL and 100 mL beakers, and custom-format vials. Its temperature stability of ±1 °C over 0–99 °C meets requirements for methods aligned with EPA Method 525.3 (purge-and-trap GC/MS), ISO 17025-accredited residue analysis, and USP residual solvent testing. While not inherently 21 CFR Part 11 compliant (as a standalone hardware device), its operational parameters are fully documentable via external lab information management systems (LIMS) or electronic lab notebooks (ELN), supporting GLP and GMP audit readiness when integrated into validated workflows.

Software & Data Management

The TTL-DCIII operates as a stand-alone instrument with a dedicated front-panel interface featuring digital temperature setpoint entry, real-time bath temperature display, and gas flow monitoring. No proprietary software is required for basic operation. However, analog output signals (0–5 V or 4–20 mA) for temperature and gas flow are available upon request for integration into centralized process monitoring systems. All parameter settings are retained after power cycling, and the controller logs maximum/minimum temperature excursions during runtime—supporting retrospective review for troubleshooting and quality assurance documentation.

Applications

• Routine cleanup of pesticide extracts prior to GC-ECD or LC-MS/MS analysis in agricultural commodity testing.
• Concentration of trace-level pharmaceutical metabolites from plasma or urine in bioanalytical laboratories.
• Pre-concentration of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in soil and sediment extracts per EPA SW-846 Methods 3510C and 3520C.
• Final solvent exchange steps in solid-phase extraction (SPE) protocols for forensic toxicology screening.
• Parallel evaporation of calibration standards and QC samples in environmental monitoring labs operating under ISO/IEC 17025 accreditation.

FAQ

Can the TTL-DCIII be used with compressed air instead of nitrogen?
Yes—the system is compatible with oil-free, particle-filtered compressed air up to 15 L/min; however, nitrogen is recommended for oxygen-sensitive compounds or when minimizing background contamination is critical.
Is the water bath volume adjustable or replaceable?
The bath has a fixed capacity optimized for thermal stability and 36-position uniformity; replacement bath inserts are not offered, but the drain valve enables rapid, complete emptying for cleaning or antifreeze filling in cold environments.
Does the instrument support programmable temperature ramps?
No—the TTL-DCIII maintains a constant user-defined setpoint; gradient evaporation protocols require external timer-based staging or integration with programmable environmental chambers.
What maintenance intervals are recommended?
Monthly visual inspection of gas needles and O-rings, quarterly calibration verification of the PT100 sensor using a NIST-traceable reference thermometer, and annual inspection of motorized lift mechanism lubrication points.
Are spare parts such as gas needles and drain valves available separately?
Yes—Tongtai Union supplies OEM-certified stainless-steel needles, PTFE-sealed drain valves, and replacement heating elements through authorized international distributors.