Drick DRK908S Fully Enclosed Oscillatory Liquid-Liquid Extractor

Overview

The Drick DRK908S Fully Enclosed Oscillatory Liquid-Liquid Extractor is an engineered solution for standardized, high-throughput sample preparation in analytical laboratories performing solvent-based extraction workflows. It operates on the principle of controlled oscillatory motion—specifically vertical reciprocating inversion—applied to standard glass or PTFE-coated separatory funnels, enabling reproducible phase dispersion and interfacial mass transfer between immiscible liquid phases. Unlike manual shaking or rotary shakers, the DRK908S replicates the kinetic profile of human wrist-driven agitation while eliminating operator variability, fatigue, and exposure risk. Its fully enclosed architecture integrates active gas-phase containment and catalytic adsorption, making it suitable for routine use with volatile organic solvents (e.g., chloroform, dichloromethane, ethyl acetate) in compliance with occupational health and safety protocols.

Key Features

• Oscillatory Inversion Mechanism: Patented vertical flip-and-return motion at adjustable frequencies (0–200 rpm), optimized to maximize interfacial surface area without emulsion over-stabilization—critical for clean phase separation in EPA Method 1664, ASTM D7066, and ISO 11348-based extractions.
• Eight Independent Extraction Stations: Modular funnel holders accommodate standard volumetric separatory funnels from 250 mL to 2000 mL; each station features individual clamping force calibration and real-time lid-seal verification via pressure-sensitive transducers.
• Integrated Exhaust Management: Onboard activated carbon filtration system with differential pressure monitoring ensures continuous adsorption of VOC vapors; filter saturation status is tracked algorithmically and triggers visual/audible alerts prior to breakthrough.
• Programmable Venting Sequence: Users define number of vent cycles, interval duration, and vent duration per cycle—preventing over-pressurization during exothermic extractions or low-boiling-point solvent use.
• Dual-Safety Interlock Architecture: Mechanical door latch and electronic proximity sensors enforce strict operational dependency: extraction initiates only when both doors are fully closed and latched; any door opening during operation halts motion and depressurizes chambers within <1.2 seconds.
• Automated Post-Extraction Rest Phase: Programmable静置 (settling) timer initiates immediately after oscillation ceases, allowing gravity-driven phase demulsification under undisturbed conditions—enhancing recovery yield and reducing carryover in subsequent analysis steps.

Sample Compatibility & Compliance

The DRK908S supports all common laboratory-grade separatory funnels meeting ASTM E288 or ISO 1042 dimensional tolerances. It is validated for use with aqueous-organic systems including but not limited to water/hexane, water/MTBE, and water/ethyl acetate. The device conforms to IEC 61010-1:2010 for electrical safety in laboratory equipment and incorporates design elements aligned with OSHA 1910.1200 (Hazard Communication Standard) and EU Directive 2014/30/EU (EMC). While not certified for Class I Div 1 hazardous locations, its sealed enclosure and filtered exhaust meet local institutional requirements for fume hood–free operation in QC labs handling moderate-risk solvents.

Software & Data Management

Control firmware runs on a Linux-based embedded OS with deterministic real-time scheduling. All method parameters—including speed, time, vent sequence, rest duration, and funnel volume—are stored as encrypted JSON profiles with timestamped audit trails. The 10.1-inch capacitive touchscreen provides WYSIWYG parameter entry and live status visualization (motor current draw, chamber pressure, filter life index). Data export supports CSV and PDF report generation with optional integration into LIMS via RS-232 or Ethernet TCP/IP (Modbus RTU/TCP protocol stack). Full audit trail functionality satisfies GLP documentation requirements per 21 CFR Part 11 when paired with user authentication and electronic signature modules (optional add-on).

Applications

• Environmental testing: Extraction of PAHs, PCBs, organochlorine pesticides, and petroleum hydrocarbons from water, soil leachates, and sediment extracts per EPA Methods 3510C, 3520C, and 3540C.
• Pharmaceutical QC: Residual solvent removal from active pharmaceutical ingredients (APIs) and excipients prior to HPLC or GC analysis.
• Food safety: Determination of mycotoxins (e.g., aflatoxin B1), veterinary drug residues, and plasticizer migration in edible oils and dairy matrices.
• Clinical toxicology: Isolation of drugs of abuse (e.g., benzodiazepines, opioids) from biological fluids using supported liquid extraction (SLE) protocols.
• Materials science: Purification of polymer additives and flame retardants from plastic extracts prior to FTIR or GC-MS characterization.

FAQ

What types of separatory funnels are compatible with the DRK908S?
Standard taper-joint glass funnels (ISO K 29/32, 45/50) and PTFE-lined funnels ranging from 250 mL to 2000 mL are supported. Funnel neck diameter must be ≤75 mm for secure clamping.
Does the system require connection to an external fume hood?
No—integrated activated carbon filtration enables safe operation outside ventilated enclosures when used with solvents having vapor pressures <100 mmHg at 20°C.
Can extraction methods be exported and shared across instruments?
Yes—method files are portable JSON objects with version metadata; they can be loaded via USB drive or network transfer.
Is maintenance log data accessible for regulatory audits?
Yes—all filter replacement events, calibration verifications, and error logs are retained for ≥12 months with immutable timestamps and operator ID tagging.
What happens if air supply pressure drops during operation?
The pneumatic monitoring module detects pressure decay >15% below setpoint and pauses the cycle while triggering an audible alarm and on-screen alert—resumption requires manual confirmation after pressure restoration.