VELP OXITEST Automatic Oxidative Stability Tester

Overview

The VELP OXITEST Automatic Oxidative Stability Tester is an engineered solution for accelerated oxidative stability assessment of lipids and lipid-containing matrices under controlled elevated temperature and oxygen pressure. Based on the principle of accelerated oxidation kinetics—where samples are subjected to elevated oxygen partial pressure (up to 8 bar) and precisely regulated temperature (ambient to 110 °C)—the OXITEST quantifies the Induction Period (IP), defined as the time elapsed until a detectable onset of rapid autoxidation, typically identified via real-time monitoring of oxygen consumption or pressure drop in sealed reaction chambers. This method provides a reproducible, comparative metric for oxidative resistance, directly correlating with shelf-life prediction and formulation robustness across food, feed, cosmetics, and nutraceutical applications. Unlike classical Rancimat or Schaal Oven tests, the OXITEST operates with dual independent reaction chambers, enabling parallel evaluation of reference and test samples under identical environmental conditions—minimizing inter-run variability and enhancing statistical confidence in stability ranking.

Key Features

• Dual-chamber architecture for simultaneous, independent oxidative testing—eliminating sequential bias and improving throughput efficiency.
• Precise pressure regulation (0–8 bar absolute) with integrated safety vacuum tube and redundant over-pressure relief mechanism compliant with PED 2014/68/EU.
• High-stability temperature control (±0.2 °C) across ambient to 110 °C, validated per ASTM E220 and ISO/IEC 17025 calibration traceability requirements.
• Real-time pressure and temperature logging at 1-second intervals, supporting GLP-compliant data integrity and audit-ready timestamped records.
• Intuitive touchscreen interface with multilingual support (English, German, French, Spanish, Italian), configurable user access levels, and password-protected method storage.
• Robust mechanical design featuring corrosion-resistant stainless-steel housing, IP20-rated electronics enclosure, and vibration-damped chamber mounting for long-term operational reliability.

Sample Compatibility & Compliance

The OXITEST accommodates homogeneous lipid-rich samples—including edible oils, margarines, fried snacks, meat emulsions, dairy powders, and encapsulated omega-3 formulations—in standard 100 mL reaction vessels. Solid or semi-solid matrices require homogenization and representative subsampling per AOAC 2012.01 and ISO 6886 guidelines. Instrument compliance extends beyond CE marking and IEC 61010-1 safety certification to full alignment with quality management frameworks: ISO 9001:2015 (design and manufacturing), ISO 14001:2015 (environmental impact mitigation), and ISO 45001:2018 (occupational health and safety). Data acquisition meets ALCOA+ principles—ensuring data is Attributable, Legible, Contemporaneous, Original, Accurate, and Complete—with optional electronic signature and 21 CFR Part 11 readiness via VELP’s OXISoft v3.2 software module.

Software & Data Management

OXISoft v3.2 is a Windows-based application providing full instrument control, automated IP calculation using first-derivative inflection detection, and customizable reporting templates aligned with internal QA protocols and third-party audit requirements. Raw data (pressure vs. time, temperature vs. time) is stored in encrypted .oxd binary format with SHA-256 hash verification; export options include CSV, PDF, and XML for LIMS integration. Audit trail functionality logs all user actions—including method edits, calibration events, and result approvals—with immutable timestamps and operator ID attribution. Remote monitoring via Ethernet or Wi-Fi enables centralized lab fleet management without compromising data sovereignty or network security.

Applications

The OXITEST serves as a core tool in product development, quality assurance, and regulatory submission workflows across multiple sectors. In food R&D, it supports antioxidant efficacy screening (e.g., tocopherol blends, rosemary extract, synthetic BHA/BHT), packaging barrier validation, and accelerated shelf-life modeling per ISO 11350. For feed manufacturers, it evaluates oxidative stability of fishmeal, soy lecithin, and vitamin premixes under tropical storage simulation. Cosmetic formulators apply it to assess rancidity onset in anhydrous creams and lipophilic active carriers. Nutraceutical producers rely on its repeatability for batch release testing of encapsulated PUFA supplements against USP and EFSA Q&As on lipid oxidation markers. Method equivalence has been demonstrated versus AOCS Cd 12b-92 and EN 14112 for refined vegetable oils.

FAQ

What standards does the OXITEST method align with?
The OXITEST methodology is referenced in AOCS Cd 12b-92, EN 14112, ISO 11350, and ASTM D7545 for oxidative stability determination in fats and oils.
Can the OXITEST be used for solid food matrices?
Yes—provided samples are homogenized to ensure representative lipid phase distribution and loaded within the 100 mL vessel capacity; particle size reduction and solvent-assisted dispersion may be required per ISO 6886.
Is method validation support available from VELP?
VELP provides IQ/OQ documentation packages, certified reference material recommendations (e.g., BHT-spiked sunflower oil), and on-site qualification services compliant with ISO/IEC 17025 and GMP Annex 15.
How is data integrity ensured during long-duration runs?
Continuous power-fail recovery, non-volatile memory buffering, and dual SD card + USB backup ensure zero data loss—even during unplanned interruptions exceeding 72 hours.
Does the system support multi-user environments with role-based access?
Yes—OXISoft v3.2 implements three-tier user roles (Operator, Supervisor, Administrator) with configurable permissions for method editing, result approval, and system configuration changes.