Spectra Invent AE-03 Automated Liquid-Liquid Extraction System

Overview

The Spectra Invent AE-03 Automated Liquid-Liquid Extraction System is an engineered solution for standardized, high-reproducibility sample preparation in environmental and regulatory laboratories. Designed specifically to support infrared spectrophotometric analysis of petroleum hydrocarbons and edible/animal-vegetable oils, the AE-03 implements pneumatic oscillation-driven liquid-liquid phase separation—leveraging controlled gas pressure to induce consistent, non-mechanical agitation between aqueous and organic phases. This principle ensures minimal emulsion formation, reduced operator intervention, and strict adherence to the physical-chemical equilibrium requirements defined in key Chinese environmental standards. The system operates within a fully enclosed extraction chamber, eliminating solvent vapor exposure and enabling safe handling of hazardous solvents such as tetrachloroethylene (C₂Cl₄) and carbon tetrachloride (CCl₄). Its architecture aligns with GLP-compliant workflows by minimizing manual transfer steps and supporting traceable, repeatable extraction conditions across batched analyses.

Key Features

• Fully automated extraction protocol execution—from solvent addition and phase mixing to phase separation and upper-layer collection
• Pneumatic oscillation mechanism delivering uniform, low-shear agitation without mechanical contact or moving parts inside the extraction chamber
• Triple-channel parallel processing capability (3 independent extraction units), each with dedicated solvent delivery and phase separation control
• Adjustable extraction duration (1–30 minutes) and programmable oscillation intensity to accommodate varying matrix viscosities and analyte partition coefficients
• Sealed, corrosion-resistant extraction chamber constructed from chemically inert materials compatible with halogenated solvents
• Integrated safety interlocks preventing operation during lid open state and monitoring solvent level integrity in real time
• Compliance-ready design supporting audit trails through external logging interfaces (e.g., RS-232 or optional USB data export)

Sample Compatibility & Compliance

The AE-03 is validated for aqueous sample volumes ranging from 50 mL to 1000 mL, making it suitable for wastewater, leachate, irrigation water (per GB 5084–2021), soil extracts (HJ 1051–2019), and stack emission condensates (HJ 1077–2019). It meets the instrumental pre-treatment specifications outlined in HJ 637–2018, including mandatory use of infrared-transparent solvents (tetrachloroethylene or carbon tetrachloride), defined shaking duration, and phase separation timing. While not certified to ISO/IEC 17025 or ASTM D7066, its operational parameters are structured to satisfy method-defined performance criteria—including ≥95% extraction recovery for C₁₀–C₄₀ aliphatic hydrocarbons under standard reference conditions. The system supports documentation practices aligned with internal QA/QC protocols and prepares raw data for integration into LIMS environments.

Software & Data Management

The AE-03 operates via embedded firmware with a tactile LCD interface; no proprietary PC software is required for routine operation. All method parameters—including cycle count, oscillation time, pause intervals, and solvent volume—are stored in non-volatile memory with up to 10 user-defined protocols. Event logs record start/stop timestamps, error codes, and lid-open events—exportable via serial interface for external archiving. Though not natively compliant with FDA 21 CFR Part 11, the system supports ALCOA+ principles when paired with laboratory-controlled documentation procedures: operators must manually record run IDs, sample identifiers, and verification checks in bound logbooks or validated electronic notebooks. Firmware updates are distributed via secure download and require physical USB key authentication.

Applications

• Pre-concentration of petroleum hydrocarbons from industrial effluents prior to FTIR or GC-FID quantification
• Isolation of edible oil contaminants (e.g., mineral oil saturated hydrocarbons, MOSH) from food-contact water simulants
• Extraction of total petroleum hydrocarbons (TPH) from groundwater monitoring wells under provincial environmental monitoring programs
• Preparation of extractable organic halides (EOX) samples using CCl₄ in compliance with legacy EPA Method 1650
• Routine QC testing of extraction efficiency using spiked deionized water standards (e.g., hexadecane, pristane, squalane)

FAQ

Does the AE-03 support solvent recycling or evaporation modules?
No—the AE-03 is a dedicated extraction platform and does not include integrated solvent recovery, concentration, or nitrogen blow-down functionality.
Can it be used with solvents other than tetrachloroethylene and carbon tetrachloride?
Yes, provided the solvent exhibits immiscibility with water, low volatility at ambient temperature, and compatibility with the fluoropolymer seals and chamber material—but method validation is required per HJ 637–2018 Annex B.
Is calibration required before each use?
No scheduled calibration is specified; however, daily system suitability checks—including blank extraction and recovery verification using certified reference materials—are recommended per laboratory SOPs.
What maintenance is needed for the pneumatic oscillation system?
Monthly inspection of air filter elements and annual replacement of O-rings in the pneumatic actuator manifold are advised to maintain consistent pressure delivery and seal integrity.
How is sample cross-contamination prevented between runs?
Each of the three extraction channels uses disposable glass or borosilicate vials; the system includes automatic solvent rinse cycles (programmable) between extractions when configured with auxiliary solvent lines.