Gerhardt Soxtherm 416 Automated Accelerated Solvent Extractor
| Brand | Gerhardt |
|---|---|
| Origin | Germany |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Instrument Type | Solid-Liquid Extraction System |
| Temperature Range | Ambient to 300 °C |
| Extraction Cell Volume | 100 mL or 150 mL |
| Extraction Time | 0–120 min |
| Dimensions (W×D×H) | 525 × 410 × 580 mm (SOX 416 Macro) |
| Sample Capacity | 2, 4, 6, or up to 24 positions (via modular configuration) |
| Power Supply | 230 VAC, 50/60 Hz |
| Power Consumption | 1200 W |
| Weight | 42 kg |
| Cooling Water Flow | 0.5–3.5 L/min, min. pressure 0.3 bar |
| Communication Interface | Dual RS-485 ports |
Overview
The Gerhardt Soxtherm 416 is a fully automated accelerated solvent extractor engineered for high-throughput, reproducible solid-liquid extraction in compliance with internationally recognized environmental and food safety protocols. Based on the principle of pressurized hot solvent extraction—operating under elevated temperature (up to 300 °C) and controlled pressure—the system significantly reduces extraction time compared to classical Soxhlet methodology while maintaining quantitative recovery of target analytes. It is validated and referenced in U.S. EPA Methods 3545A and 3546, as well as FDA guidance for persistent organic pollutants (POPs), including dioxins, PCBs, PAHs, and pesticide residues in complex matrices such as soil, sediment, foodstuffs (e.g., milk, meat, cereals), feed, air filters, and solid waste. The instrument’s modular architecture enables scalable deployment—from single-unit benchtop operation to synchronized 24-position workflows—without compromising method integrity or operator safety.
Key Features
- Modular platform supporting 2-, 4-, and 6-position configurations; up to four 6-position units can be networked for parallel 24-sample processing, each operating independently with distinct solvent, temperature, and timing parameters.
- Pneumatic actuation with only three moving parts—eliminating lubricants, seals, and routine mechanical maintenance; designed for >10,000 operational cycles with proven reliability in regulated laboratory environments.
- Integrated safety architecture compliant with DIN/VDE 0170 and 0171 explosion-protection standards: includes real-time monitoring of cooling water flow, compressed air pressure, thermal cut-off at solvent flash point, optical overfill detection in solvent recovery vessels, and interlocked front access door with thermal shielding.
- Low solvent consumption (typically 15–30 mL per extraction cycle) and integrated solvent recycling system with post-extraction purification—enabling reuse of solvents such as hexane, acetone, dichloromethane, and ethyl acetate (with peroxide testing recommended for diethyl ether).
- Single-button initiation and fully programmable operation; intuitive interface via either embedded multi-channel controller (32-character alphanumeric display, multilingual support) or PC-based Soxtherm Manager software.
- Specialty borosilicate glass extraction cells manufactured using traditional hand-blown techniques—ensuring optical clarity for process observation, dimensional precision for leak-free sealing, and thermal stability across repeated thermal cycling.
Sample Compatibility & Compliance
The Soxtherm 416 accommodates heterogeneous solid samples ranging from 0.5 g to 30 g, including soils, sludges, biological tissues, dairy products, grains, polymers, and filter media. Its robust cell design supports both macro- and micro-scale extractions (compatible with SOX 406/SOX 416 Macro and SOX 402/SOX 412 Micro variants). The system meets critical regulatory requirements for analytical traceability and data integrity: full audit trail functionality, electronic signatures, user-level password protection, and time-stamped event logging—including start time, operator ID, run duration, error codes, and parameter deviations. All software operations adhere to FDA 21 CFR Part 11 principles, supporting GLP and GMP-compliant laboratories undergoing external inspection or accreditation (e.g., ISO/IEC 17025). Method validation documentation and application notes for EPA SW-846, ISO 18333, and EN 16167 are available upon request.
Software & Data Management
The optional Soxtherm Manager software serves as a centralized Windows-based workstation for method development, instrument control, diagnostics, and data archival. It supports simultaneous supervision of up to four Soxtherm units on a single screen—each with dedicated program and status windows that can be tiled, cascaded, or minimized per user preference. All extraction parameters (temperature ramp profiles, static/dynamic phases, flush volumes, purge steps) are stored in encrypted project files with version history. The software automatically generates comprehensive log files (.csv and .pdf) containing raw sensor data, alarm timestamps, hardware status reports, and calibration verification records. Offline mode allows pre-loaded methods to execute autonomously—even if the host PC is disconnected—ensuring uninterrupted batch processing. Diagnostic modules continuously validate pressure transducer response, heater performance, and fluidic path integrity, issuing predictive warnings prior to fault escalation.
Applications
The Soxtherm 416 delivers validated performance across environmental monitoring (EPA 3545A for PAHs in soil), food safety testing (EU Regulation 2023/915 for dioxin screening in animal fats), pharmaceutical residual solvent analysis (ICH Q3C), and industrial quality control (e.g., plasticizer extraction from PVC, antioxidant recovery from rubber). Its flexibility extends to emerging applications such as microplastic isolation from wastewater sludge, cannabinoid profiling in botanical extracts, and leachable testing of medical device packaging. Laboratories performing routine POPs analysis report >30% reduction in hands-on time and <2% RSD in replicate extractions when compared to manual Soxhlet systems—directly contributing to improved laboratory efficiency and method robustness.
FAQ
Is the Soxtherm 416 compatible with halogenated solvents such as chloroform or carbon tetrachloride?
Yes—provided appropriate fume hood ventilation and solvent compatibility verification with glassware and seals. Gerhardt recommends consulting the Material Safety Data Sheet (MSDS) and performing preliminary compatibility tests before routine use.
Can extraction methods be transferred directly from classical Soxhlet protocols?
Method transfer requires empirical optimization of temperature, static time, and solvent volume; however, Gerhardt provides validated method templates aligned with EPA 3545A and AOAC 999.05 to accelerate qualification.
What maintenance is required beyond routine cleaning of extraction cells?
No scheduled mechanical maintenance is required. Users should inspect O-rings annually, replace desiccant in the air dryer quarterly, and verify water-cooling line integrity biannually.
Does the system support unattended overnight operation?
Yes—programmed start times, automatic shutdown after completion, and fail-safe thermal/pressure cutoffs enable secure unattended operation for extended batches.
Are original Gerhardt consumables mandatory for regulatory compliance?
While third-party cells may fit physically, only Gerhardt-certified extraction cups, filters, and seals are validated for dimensional repeatability, thermal shock resistance, and solvent compatibility—ensuring consistent method performance and audit readiness.
