Agela NV-15G 15-Position Dry-Block Nitrogen Evaporator

Overview

The Agela NV-15G is a precision-engineered 15-position dry-block nitrogen evaporator designed for reproducible, solvent-free concentration of volatile analytes in analytical laboratories. Unlike water-bath or sand-bath systems, the NV-15G employs a solid aluminum heating block with sandblasted anodized surface—optimized for rapid thermal response, uniform heat distribution, and chemical resistance. Its operation is based on controlled nitrogen gas sweep across sample surfaces, accelerating solvent evaporation while minimizing analyte degradation, oxidation, or cross-contamination. The instrument is widely deployed in preparative chromatography workflows, environmental residue analysis (e.g., EPA Method 525.3), pesticide screening, clinical toxicology, and pharmaceutical QC where parallel processing of up to 15 samples—each under individually managed thermal and gaseous conditions—is required.

Key Features

• Dry-block architecture: Precision-machined 15-well aluminum block (19 mm diameter × 70 mm depth) with sandblasted anodized finish ensures mechanical stability, corrosion resistance, and consistent thermal conductivity across all positions.
• Independent gas control: Each of the 15 stainless-steel吹扫 needles features a dedicated on/off valve, enabling selective nitrogen flow to individual samples without affecting adjacent channels—critical for heterogeneous sample sets requiring staggered evaporation endpoints.
• Height-adjustable needle holder: Linearly adjustable support accommodates vials and test tubes of varying heights (up to 150 mm), maintaining optimal gas delivery distance (typically 5–10 mm above liquid surface) for efficient mass transfer.
• Rotatable 90° needle base: Facilitates unobstructed access during sample loading/unloading without disassembly; eliminates risk of accidental needle displacement or tube tipping.
• Dual-display digital PID controller: Simultaneously shows setpoint and real-time block temperature with 0.1 °C resolution; programmable ramp-hold profiles support method-defined thermal protocols.
• Thermal performance: Achieves ±0.3 °C temperature stability across the full operating range (≥5 °C above ambient to 150 °C), verified per ASTM E220 calibration practices using traceable NIST-certified probes.

Sample Compatibility & Compliance

The NV-15G accommodates standard 10–15 mL glass culture tubes, 13 × 100 mm test tubes, and 16 mm OD centrifuge tubes—compatible with common SPE cartridge eluates, LC fractions, and derivatized extracts. Its dry-heating design eliminates water contamination risks and supports use with moisture-sensitive compounds (e.g., organometallics, acid-labile metabolites). The unit complies with IEC 61010-1:2010 for laboratory electrical equipment safety and meets electromagnetic compatibility requirements per EN 61326-1. While not intrinsically rated for hazardous locations, its sealed electronics and grounded chassis support routine operation in ISO Class 7 cleanrooms and GLP-compliant environments. Documentation includes factory calibration certificate, electrical safety test report, and material compliance statement (RoHS 2011/65/EU, REACH SVHC).

Software & Data Management

The NV-15G operates as a standalone instrument with no embedded software or network interface. All parameter settings—including temperature setpoint, dwell time, and gas flow estimation—are manually configured via front-panel controls. For regulated environments (e.g., FDA-regulated labs), users may integrate the device into validated workflows using external electronic lab notebooks (ELNs) or LIMS platforms. Temperature logs can be recorded manually or captured via optional external data loggers (e.g., Omega OM-DAQPRO-5300) connected to the analog output port (0–5 V proportional to block temperature). Audit trails, user access control, and electronic signatures are maintained externally in accordance with 21 CFR Part 11 when paired with compliant ELN systems.

Applications

• Concentration of GC-MS and LC-MS/MS extracts prior to reconstitution and injection
• Post-SPE cleanup of environmental water samples (PAHs, PCBs, phthalates)
• Preparative fraction drying in natural product isolation
• Residue analysis in food and feed matrices (EU Regulation No. 37/2010)
• Stability-indicating assays requiring inert atmosphere handling
• High-throughput sample prep for clinical urine drug screens (SAMHSA guidelines)

FAQ

Is the NV-15G compatible with pressurized nitrogen generators?
Yes—the inlet accepts regulated nitrogen at up to 100 psi; integration with lab-grade nitrogen generators (e.g., Peak Scientific, Parker Domnick Hunter) is routinely performed using standard 1/8″ compression fittings.

Can the heating block be replaced or customized for non-standard tube sizes?
The block is mechanically fixed and not field-replaceable; however, Agela offers OEM block redesign services for volume orders requiring alternate well geometry (e.g., 24-position 12 mm format).

Does the unit include a nitrogen flow meter?
No—gas flow is adjusted via calibrated needle valves; users must supply an external rotameter or mass flow controller for quantitative validation per ISO 5725-2 accuracy requirements.

What maintenance is required to ensure long-term temperature accuracy?
Annual verification with a calibrated reference thermometer (±0.1 °C tolerance) is recommended; cleaning of needle ports with ethanol and lint-free swabs prevents polymer buildup from solvent residues.