Allsheng MD200-1A 96-Position Dry-Block Nitrogen Evaporator

Overview

The Allsheng MD200-1A is a high-throughput, dry-block nitrogen evaporator engineered for precise, oxygen-free concentration of volatile solvent-based samples in regulated laboratory environments. It operates on the principle of controlled inert gas displacement—nitrogen is delivered via precision-positioned stainless steel needles directly above sample surfaces within thermally stabilized wells, accelerating solvent evaporation while minimizing analyte degradation, oxidation, or cross-contamination. Unlike water-bath systems, its dry-block architecture eliminates condensation risks, ensures rapid thermal response, and supports strict compliance with GLP/GMP sample preparation workflows. Designed for integration into analytical pipelines—including LC-MS, GC-MS, HPLC, and ELISA preprocessing—the MD200-1A accommodates standardized 0.2 mL microtubes across a full 96-well footprint, enabling parallel processing without manual repositioning or batch splitting.

Key Features

• Dry-block heating system with aluminum alloy heating module offering uniform thermal distribution (±0.3°C at 40°C across the block) and rapid ramp time (≤30 minutes from 25°C to 150°C)
• Independent digital PID temperature control with 0.1°C display resolution and dual-range accuracy: ±0.5°C between 40–100°C and ±1.0°C between 100–150°C
• Height-adjustable gas manifold with 96 individually aligned, corrosion-resistant stainless steel needles (standard length: 80 mm), each positioned directly over tube wells for laminar nitrogen flow
• Real-time visual monitoring capability: transparent front panel and adjustable manifold height allow unobstructed observation of solvent meniscus during evaporation
• Integrated safety architecture including over-temperature cutoff, continuous self-diagnostic circuitry, and audible alarm for abnormal conditions (e.g., gas flow interruption, sensor failure)
• Modular design compatible with optional interchangeable blocks for alternative tube formats (subject to accessory availability); current configuration optimized for 0.2 mL PCR-style tubes

Sample Compatibility & Compliance

The MD200-1A is validated for use with common organic solvents—including acetonitrile, methanol, ethyl acetate, and dichloromethane—across pharmaceutical QC, clinical toxicology, environmental residue analysis, and forensic chemistry applications. Its inert gas delivery path and sealed block interface meet baseline requirements for ASTM D5291 (elemental analysis sample prep) and ISO 17025-accredited laboratories performing method validation per ICH Q2(R2). While not intrinsically certified for hazardous location use, the unit may be fully enclosed within Class II Type A2 or B2 biosafety cabinets or fume hoods when handling highly volatile or toxic solvents, satisfying OSHA 29 CFR 1910.1200 and local ventilation mandates. No lubricants or polymer gaskets contact sample zones, ensuring trace-metal-free operation suitable for ultra-trace elemental or isotopic studies.

Software & Data Management

The MD200-1A operates via embedded firmware with no external PC dependency. All operational parameters—including setpoint temperature, elapsed time, remaining countdown, and real-time chamber temperature—are displayed on a high-contrast LED interface. Though it does not feature USB or Ethernet connectivity, its deterministic control logic and non-volatile parameter memory support audit-ready documentation under FDA 21 CFR Part 11 when paired with laboratory information management systems (LIMS) that log instrument usage metadata via timestamped operator entries. The absence of cloud services or remote access aligns with air-gapped network policies in government and defense-contracted labs.

Applications

• Routine concentration of derivatized steroid metabolites prior to GC-MS quantification in clinical endocrinology labs
• High-volume cleanup of pesticide extracts from QuEChERS-prepared food matrices before LC-MS/MS analysis
• Parallel evaporation of 96-well plate-derived plasma samples in pharmacokinetic screening assays
• Pre-concentration of environmental water extracts containing PAHs or PCBs for subsequent GC-ECD detection
• Stabilization of light-sensitive compounds (e.g., retinoids, porphyrins) by eliminating oxygen exposure during solvent removal

FAQ

Is the MD200-1A compatible with 0.5 mL or 1.5 mL tubes?
No—the standard configuration is fixed for 0.2 mL microtubes. Alternate well plates or custom blocks are not supplied by Allsheng and are not validated for thermal or mechanical compatibility.
What nitrogen pressure range is recommended for optimal performance?
The instrument accepts inlet pressures of 0.1–0.3 MPa; flow rate is electronically regulated between 0–15 L/min. Excessive pressure (>0.4 MPa) may cause needle misalignment or uneven flow distribution.
Does the unit include a nitrogen generator?
No—MD200-1A requires an external nitrogen source meeting ISO 8573-1:2010 Class 2 purity standards (dew point ≤ –40°C, oil content ≤ 0.01 mg/m³).
Can temperature calibration be performed onsite?
Yes—users may perform two-point verification using NIST-traceable PT100 probes inserted into designated calibration wells; procedure is detailed in Section 4.2 of the English-language Operation Manual (Rev. 2023).
Is CE or UL certification available for this model?
The MD200-1A complies with IEC 61010-1:2010 for electrical safety and EMC per EN 61326-1:2013, but carries no CE marking for EU market placement; UL listing is not pursued for this export-oriented configuration.