HengAo HSC-24A Water-Bath Nitrogen Evaporator

Overview

The HengAo HSC-24A Water-Bath Nitrogen Evaporator is an engineered solution for gentle, parallel concentration of volatile solvents in biological, environmental, pharmaceutical, and food safety laboratories. It operates on the principle of controlled nitrogen gas sweeping across the surface of liquid samples immersed in a precisely regulated water bath—accelerating solvent evaporation while minimizing thermal degradation, oxidation, or analyte loss. Unlike dry-block evaporators, the water-bath design ensures uniform heat distribution and superior temperature homogeneity across all 24 sample positions, making it especially suitable for thermally labile compounds such as steroids, pesticides, vitamins, and nucleic acid derivatives. The system is configured for routine use in QC/QA workflows requiring reproducible, traceable, and compliant sample preparation prior to GC, HPLC, LC-MS, or ELISA analysis.

Key Features

• 24-position stainless-steel water bath with adjustable tube holders accommodating round-bottom or conical tubes from 10 mm to 29 mm outer diameter—no fixed heating blocks required.
• PID-controlled digital temperature regulation (ambient to 100 °C) with ±1 °C stability across the bath surface, verified per ASTM E2234 standard practice for thermal uniformity mapping.
• Independent mass-flow regulated nitrogen delivery (0–10 L/min) with precision needle valves at each position, enabling method-specific flow optimization without cross-contamination.
• Overheat protection circuitry and automatic cut-off at 105 °C ensure operational safety during unattended runs.
• Front-panel 4-digit LED display with real-time temperature readout and intuitive parameter navigation—no software installation or PC dependency required.
• Low-power 150 W heating element minimizes energy consumption and reduces ambient heat load in shared laboratory environments.

Sample Compatibility & Compliance

The HSC-24A accommodates standard 10–29 mm OD glass or polypropylene tubes—including 13 × 100 mm, 16 × 150 mm, and 20 × 150 mm formats—without adapter kits. Its open-bath architecture allows direct visual monitoring of sample volume and meniscus level throughout evaporation. From a regulatory standpoint, the instrument supports instrument qualification per ICH Q2(R2) and USP , with documented calibration procedures for temperature sensors and flow meters. While not FDA 21 CFR Part 11–certified out-of-the-box, its analog control interface and non-networked architecture facilitate integration into validated environments where electronic records are managed externally via LIMS or paper-based SOPs. All materials in contact with the bath (stainless steel 304 tank, PTFE-coated gas nozzles) comply with USP Class VI biocompatibility requirements.

Software & Data Management

The HSC-24A is a standalone hardware platform with no embedded firmware, cloud connectivity, or proprietary software. Temperature setpoints and runtime are manually entered and retained via non-volatile memory in the PID controller. For laboratories requiring electronic recordkeeping, external data loggers (e.g., Omega OM-DAQPRO-5300 series) may be interfaced via 4–20 mA or 0–5 V analog outputs (available upon request with optional upgrade kit). Audit trails, calibration history, and preventive maintenance logs are maintained per internal laboratory SOPs—consistent with ISO/IEC 17025 Clause 6.4.4 on equipment management.

Applications

• Residue analysis: Concentration of pesticide extracts (e.g., QuEChERS supernatants) prior to GC-ECD or LC-MS/MS quantification.
• Clinical toxicology: Preparation of urine or plasma samples for benzodiazepine or opioid screening.
• Environmental testing: Final volume adjustment of PAH or PCB extracts following SPE cleanup.
• Nutraceutical QA: Solvent removal from carotenoid or tocopherol isolates prior to spectrophotometric assay.
• Forensic chemistry: Parallel processing of seized drug dilutions under chain-of-custody protocols.

FAQ

Is the HSC-24A compatible with corrosive solvents such as chloroform or DCM?
Yes—the water bath tank is constructed from electropolished 304 stainless steel, and gas nozzles feature PTFE linings, providing resistance to common organic solvents. However, prolonged exposure to strong oxidizers (e.g., nitric acid vapors) is not recommended.
Can temperature calibration be performed in-house?
Yes—users may verify bath uniformity using NIST-traceable PT100 probes at multiple locations (center, corners, mid-edge) per ASTM E2234. Calibration certificates are available from authorized service providers.
Does the unit include nitrogen gas supply or pressure regulator?
No—nitrogen source, regulator, and filtration (e.g., hydrocarbon trap, moisture filter) must be provided separately to meet ISO 8573-1 Class 2 purity requirements for analytical applications.
What maintenance is required for long-term reliability?
Monthly descaling of the water bath with 5% citric acid solution is recommended for hard-water regions; annual inspection of PID controller accuracy and gas valve sealing integrity is advised.
Is there a CE or UL certification for this model?
The HSC-24A complies with IEC 61010-1:2010 for electrical safety and EMC per EN 61326-1:2013; CE marking documentation is available upon request for EU shipment.