PrepElite-GVS Gel Permeation Chromatography (GPC) and Solid-Phase Extraction (SPE) Integrated Sample Preparation Platform by LabTech

Overview

The PrepElite-GVS is a modular, fully automated sample preparation platform engineered for high-throughput, reproducible cleanup of complex biological and environmental matrices prior to chromatographic analysis. It integrates gel permeation chromatography (GPC), solid-phase extraction (SPE), and dual-mode online concentration into a single, programmable workflow—enabling sequential or standalone operation of each module. The system operates on the principle of size-exclusion separation in GPC mode, where macromolecules (e.g., lipids, polymers, triglycerides) are eluted earlier than low-molecular-weight analytes (e.g., pesticides, PAHs, PCBs, mycotoxins), allowing selective removal of interfering matrix components. In SPE mode, it leverages reversed-phase, ion-exchange, or mixed-mode sorbents under precisely controlled flow and pressure conditions to achieve selective retention and elution. Designed for trace- and ultratrace-level analysis, the PrepElite-GVS minimizes manual handling, reduces solvent consumption, suppresses cross-contamination, and enhances method robustness—critical for compliance with ISO/IEC 17025, AOAC Official Methods®, and EPA Method 3640A (GPC cleanup) and Method 508.1 (SPE).

Key Features

• Fully enclosed, leak-tight architecture enabling continuous 24/7 unattended operation in regulated laboratory environments
• Dual-concentration module with two independent, PTFE-coated concentration cups—enabling parallel evaporation and real-time solvent vapor condensation with >95% recovery efficiency
• GPC module equipped with dual-piston precision solvent delivery pump (flow accuracy ±0.5%, pulse-free output) and variable-wavelength UV detector (190–600 nm) for real-time fraction monitoring
• SPE module supporting up to 12-channel parallel processing; compatible with 1 mL–10 mL cartridges and 96-well plates; full-sample loading capability ensures quantitative transfer and maximizes analyte recovery
• Intelligent flow control with active pressure feedback and dynamic backpressure regulation (up to 1 MPa), ensuring stable elution profiles across viscous or particulate-laden extracts
• Customizable sample rack configuration: accepts standard 10–100 mL vials, 4–20 mL glass tubes, and 96-deep-well plates; rack geometry and position mapping programmable via software
• Bilingual (English/Chinese) HMI with role-based user access control, audit trail logging, and electronic signature support aligned with FDA 21 CFR Part 11 requirements

Sample Compatibility & Compliance

The PrepElite-GVS accommodates a broad spectrum of challenging sample types—including fatty food homogenates (e.g., fish tissue, dairy products), crude oil-contaminated soils, sediment slurries, plant extracts, and clinical plasma. Its GPC column is packed with cross-linked polystyrene-divinylbenzene (PS-DVB) gel (e.g., Bio-Beads SX-3), offering high chemical resistance and consistent pore-size distribution (exclusion limit ~4,000 Da). All wetted parts are constructed from inert materials (316L stainless steel, PEEK, FEP, and quartz) to prevent adsorption or leaching. The system supports method validation per ICH Q2(R2), meets GLP/GMP documentation standards, and facilitates full traceability from sample injection to final vial collection—including timestamps, pressure logs, UV chromatograms, and fraction weight records.

Software & Data Management

Controlled via LabTech’s PrepControl™ v4.x software, the platform provides method editor, sequence scheduler, real-time system diagnostics, and integrated data archiving. Each run generates a compliant .XML-based audit file containing raw detector signals, pump profiles, valve switching events, and environmental sensor readings (temperature, humidity). Data export supports CSV, PDF, and CDF formats compatible with LIMS integration (e.g., Thermo Fisher SampleManager, LabVantage). Software includes built-in SOP templates for EPA, EU SANTE, and Chinese GB standards, and supports electronic signatures with multi-level authentication (password + token). All changes to methods or parameters are logged with user ID, timestamp, and reason-for-change fields.

Applications

• Multi-residue pesticide analysis in fruits, vegetables, and cereals (per EU SANTE/11312/2021)
• PAH and PCB determination in marine sediments and edible oils (per EPA 8270D and ISO 18856)
• Mycotoxin purification from corn and peanut extracts prior to LC-MS/MS quantification
• Endocrine disruptor screening in wastewater effluents using GPC-SPE-LC-MS workflows
• Pharmaceutical impurity profiling requiring lipid removal from biologic drug formulations
• Forensic toxicology sample prep where matrix suppression and column protection are critical

FAQ

Can the PrepElite-GVS be validated for GLP-compliant laboratories?
Yes—the system supports full 21 CFR Part 11 compliance, including electronic signatures, audit trails, and secure data storage. IQ/OQ/PQ documentation packages are available upon request.
Is method transfer possible between PrepElite-GVS and other LabTech platforms?
Method files (.prf) are interoperable across PrepElite-SV and PrepElite-GVS series instruments when using identical hardware modules and firmware versions.
What maintenance intervals are recommended for the GPC column and SPE manifolds?
GPC columns typically last ≥500 injections with proper sample filtration; SPE manifolds require quarterly calibration of pressure sensors and annual replacement of sealing O-rings.
Does the system support custom fraction collection based on UV peak detection?
Yes—real-time UV threshold triggering enables intelligent fraction cutting, with configurable delay compensation and volume-based override logic.
Can the PrepElite-GVS interface directly with autosamplers from Agilent, Waters, or Shimadzu?
Via optional TTL/RS-232 trigger output, the system can synchronize fraction collection with external LC/GC autosamplers for seamless hyphenated workflows.