ZiQi DCY-24W 24-Position Digital Water Bath Nitrogen Evaporator

Overview

The ZiQi DCY-24W is a precision-engineered 24-position digital water bath nitrogen evaporator designed for high-throughput solvent removal in analytical and preparative laboratories. It operates on the principle of gentle, inert gas-assisted evaporation: nitrogen gas is delivered via individually adjustable stainless-steel or PTFE-coated needles directly above sample surfaces immersed in a thermally uniform water bath. This configuration ensures rapid yet controlled solvent volatilization—without thermal degradation or oxidative artifact formation—making it ideal for sensitive analytes such as steroids, pharmaceutical metabolites, pesticide residues, and clinical biomarkers. Unlike rotary evaporation, which processes samples sequentially under vacuum and elevated temperature, the DCY-24W enables parallel processing of up to 24 samples under ambient pressure and precisely regulated thermal conditions. Its circular rotating sample platform enhances ergonomics during loading/unloading, while the digitally controlled water bath delivers stable, reproducible heating across the entire working zone.

Key Features

• 24-position circular sample block with engraved numeric identification for unambiguous sample tracking
• Digital PID temperature control system with real-time display (range: ambient to 100 °C; stability: ±1 °C; display resolution: 0.1 °C)
• Independent needle height adjustment per channel—lockable stainless-steel or PTFE-coated guide rods accommodate tubes from 10 mm to 29 mm in diameter and 1–50 mL volume
• Individual needle valve control for precise, repeatable nitrogen flow regulation (0–10 L/min per channel; max inlet pressure ≤200 kPa)
• Rotating sample carrier allows full 360° access—reducing operator fatigue and improving workflow efficiency
• Water bath equipped with dry-run protection: automatic cut-off and audible alarm if water level falls below safe operating threshold
• Corrosion-resistant construction: all wetted parts fabricated from 316 stainless steel or PTFE-coated components; tubing is food-grade transparent silicone (odorless, non-leaching)
• Integrated power supply: 220 V AC, 50 Hz; rated heating power: 200 W; low thermal inertia design ensures rapid warm-up and minimal overshoot

Sample Compatibility & Compliance

The DCY-24W accommodates standard laboratory vessels including round-bottom test tubes, conical centrifuge tubes, and glass vials (diameter 10–29 mm). Its modular gas delivery architecture eliminates cross-contamination risk—each channel operates pneumatically isolated, with no shared manifolds or internal tubing junctions. The instrument meets fundamental safety and performance expectations for routine use in GLP-compliant environments. While not certified to IEC 61010-1 or UL 61010B out-of-the-box, its electrical insulation, grounding continuity, and thermal cutoff mechanisms align with baseline requirements for Class II laboratory equipment. For regulated applications (e.g., USP , ISO/IEC 17025, or FDA 21 CFR Part 11 workflows), users may integrate external audit-trail-capable controllers or log temperature/flow data via optional RS-232 or analog output modules (not included).

Software & Data Management

The DCY-24W operates as a standalone hardware platform with embedded digital controls—no proprietary software or driver installation required. Temperature setpoint, actual bath reading, and operational status are displayed on a high-contrast LED interface. For laboratories requiring traceable parameter logging, the unit supports optional analog voltage output (0–5 V or 4–20 mA) proportional to bath temperature, compatible with third-party data acquisition systems (e.g., LabVIEW, Delta-T, or custom SCADA platforms). Users performing method validation under ISO 17025 may manually record time-stamped setpoints and observed deviations; periodic calibration using NIST-traceable reference thermometers is recommended every 6 months or per internal SOP.

Applications

• Routine sample preparation prior to GC-MS, LC-MS/MS, and HPLC analysis in environmental, forensic, and clinical toxicology labs
• Concentration of extractables from solid-phase extraction (SPE) and QuEChERS protocols
• Preparative cleanup steps in residue analysis (e.g., EU MRL compliance testing per SANTE/11813/2021)
• High-throughput evaporation in drug discovery pipelines—especially for combinatorial library work and ADME screening
• Stabilization of oxygen-sensitive compounds (e.g., catecholamines, nitrosothiols) where inert atmosphere preservation is critical
• Method transfer between research and QC labs due to consistent thermal profile and mechanical repeatability

FAQ

Is the DCY-24W compatible with organic solvents such as acetonitrile or dichloromethane?
Yes—the water bath enclosure and PTFE/stainless-steel gas path are chemically resistant to common polar and non-polar solvents. However, ensure adequate fume hood ventilation during operation.
Can I use this unit for vacuum-assisted evaporation?
No—the DCY-24W is designed exclusively for positive-pressure nitrogen purging. It does not support vacuum connections or integrated vacuum pumps.
What maintenance is required to ensure long-term accuracy?
Monthly visual inspection of silicone tubing integrity, quarterly cleaning of water bath chamber with deionized water, and biannual verification of temperature sensor calibration using a certified reference thermometer.
Does the unit include nitrogen gas supply or regulators?
No—users must provide an external nitrogen source (≥99.998% purity recommended) and a calibrated pressure regulator capable of delivering stable 0–200 kPa output.
Is the rotating sample platform motorized?
No—the rotation is manual, enabling smooth 360° positioning without electronic components—enhancing reliability and reducing service complexity.