Jiayuan MD200-1 Dry-Block Nitrogen Evaporator

Overview

The Jiayuan MD200-1 Dry-Block Nitrogen Evaporator is an engineered solution for parallel solvent removal in analytical sample preparation workflows. It operates on the principle of inert gas-assisted evaporation—introducing a controlled stream of nitrogen across the surface of heated liquid samples to accelerate solvent volatilization while minimizing oxidation, thermal degradation, or cross-contamination. Unlike rotary evaporation—which processes one or few samples sequentially—the MD200-1 enables simultaneous concentration of up to 12 samples under identical, reproducible thermal and gas-flow conditions. Its dry-block heating architecture eliminates reliance on water or oil baths, delivering faster thermal response, improved temperature homogeneity across the heating surface, and reduced maintenance overhead. Designed for integration into regulated environments, the system supports method consistency across QC, clinical research, and pharmaceutical development labs where trace-level analyte integrity is critical.

Key Features

• Dry-block heating module with rapid thermal response: reaches 150°C from 40°C in ≤30 minutes; maintains stability within ±1°C at 100°C.
• Independent gas flow control per needle: each of the 12 adjustable stainless-steel gas needles features individual on/off switching and fine-tuned flow regulation (0–10 L/min total range), minimizing nitrogen consumption during partial-use protocols.
• Vertically adjustable gas manifold: enables real-time visual monitoring of sample meniscus levels during evaporation—critical for endpoint determination in volume-sensitive applications such as LC-MS or GC-MS sample prep.
• Interchangeable modular blocks: compatible with the KD200-series block system (e.g., BD04 for 1.5 mL microcentrifuge tubes, BD05 for 15 mL conical tubes); all blocks feature precision-machined wells for consistent thermal transfer and tube stability.
• Integrated safety architecture: includes dual-stage over-temperature cutoff, automatic fault diagnostics with LED alert indicators, and audible alarm activation upon sensor deviation or pressure anomaly.
• Human-centric interface: large LED display shows real-time temperature (0.1°C resolution), countdown timer (up to 99 h 59 min), and system status; intuitive membrane keypad allows quick parameter entry without software dependency.

Sample Compatibility & Compliance

The MD200-1 accommodates standard tube formats ranging from 0.5 mL PCR strips to 15 mL polypropylene conical tubes, supporting common consumables used in HPLC, GC, and mass spectrometry sample workflows. Its compact footprint (280 × 240 × 500 mm) and low-pressure nitrogen requirement (≤0.1 MPa) facilitate safe operation inside fume hoods—essential when handling volatile organic solvents (e.g., acetonitrile, ethyl acetate, hexane) or suspected genotoxic compounds. While not certified to ISO/IEC 17025 or FDA 21 CFR Part 11 out-of-the-box, the instrument’s deterministic thermal control, auditable timer logs, and hardware-based safety interlocks align with GLP/GMP-aligned validation practices. Users may document calibration procedures per ASTM E2877-22 (Standard Guide for Validation of Laboratory Evaporators) and maintain traceable records using external loggers or LIMS-integrated time-stamping.

Software & Data Management

The MD200-1 operates as a standalone benchtop device with no embedded operating system or network connectivity. All operational parameters—including setpoint temperature, elapsed/remaining time, and gas-on status—are retained in non-volatile memory across power cycles. For laboratories requiring electronic record retention, the unit’s timer and temperature display support manual logging or integration with external data acquisition systems via optional analog output modules (sold separately). No proprietary software is required; however, validated SOPs should specify calibration frequency (recommended quarterly), probe verification (using NIST-traceable thermometers), and gas flow meter verification per ISO 6145-2.

Applications

• High-throughput sample cleanup prior to LC-MS/MS analysis of steroids, pesticides, or pharmaceutical residues in biological matrices (plasma, urine, tissue homogenates).
• Concentration of derivatized amino acids or fatty acid methyl esters (FAMEs) for GC-FID or GC-MS quantification.
• Preparative desalting of peptide digests before MALDI-TOF MS analysis.
• Residue testing in food and environmental samples per AOAC 2007.01 and EPA Method 525.3.
• Stability-indicating assays requiring inert atmosphere preservation during solvent exchange steps.

FAQ

Is the MD200-1 suitable for use with flammable solvents?
Yes—when operated inside a certified chemical fume hood with appropriate ventilation and static-dissipative nitrogen supply lines.
Can the heating block be calibrated independently?
Yes; the dry-block design permits verification using a calibrated reference thermometer inserted into representative wells per ISO/IEC 17025 Clause 6.5.2.
What maintenance is required for long-term reliability?
Annual inspection of gas needle alignment, cleaning of aluminum block vents with compressed air, and verification of pressure regulator output stability.
Does the unit support programmable multi-step methods?
No; it provides single-setpoint temperature and fixed-duration operation. Multi-stage protocols require manual intervention or external sequencing controllers.
Are replacement modules available for non-standard tube formats?
Yes—custom KD200-series blocks (e.g., for 96-well plates or 20 mL vials) can be ordered directly from authorized Jiayuan distributors under part numbers aligned with ISO 8573-1 clean air classification requirements.