Metrohm 892 Professional Rancimat

The Metrohm 892 Professional Rancimat, supplied as a complete system with a dedicated PC, StabNet software, and all necessary supplies (including disposable reaction vessels and measuring accessories), is the global benchmark analytical instrument for determining the oxidation stability of natural fats, oils, and lipid-containing products. Utilizing the well-established Rancimat method (EN ISO 6886, AOCS Cd 12b-92), the instrument accelerates the oxidation process by heating the sample (ranging from 50 to 220 °C) and passing a continuous stream of air through it. As the sample oxidizes, volatile secondary oxidation products, primarily formic acid, are carried out of the sample vessel and into a measuring vessel containing deionized water, where the increase in electrical conductivity is measured precisely. The time elapsed until a sharp rise in conductivity occurs is defined as the induction time, which serves as the Oxidation Stability Index (OSI) to predict shelf life and evaluate antioxidant efficacy. This configuration, featuring the integrated PC and software, allows for seamless automation, real-time monitoring, and secure data management, making it an indispensable tool for quality control laboratories in the food, cosmetic, and biodiesel industries.

The 892 Professional model is designed for high throughput and user convenience, featuring 8 independent measuring positions distributed across two separate aluminum heating blocks, allowing for the simultaneous analysis of multiple samples or replicate measurements. A standout feature of this system is the inclusion of practical disposable glass reaction vessels, which significantly minimize cleaning efforts and cross-contamination risks, while the robust measuring vessel covers integrate the conductivity electrodes for enhanced reliability and ease of handling. Operation is highly flexible; while the StabNet software on the connected PC controls method parameters, data acquisition, and evaluation, each of the 8 measuring positions possesses an individual start button on the instrument front panel, allowing users to initiate tests directly on the device even without immediate PC interaction. The built-in color display provides a clear, real-time overview of the status, temperature, airflow, and conductivity curve for each channel. Furthermore, the system includes an internal, maintenance-free diaphragm air pump that delivers a highly stable airflow between 1 and 25 L/h, eliminating the need for external gas cylinders and ensuring consistent, reproducible results across all measurement points.

Supplied with the full suite of Metrohm consumables and the advanced StabNet software, this Rancimat system meets the stringent demands of modern regulated laboratories, offering full compliance with GLP, GMP, and FDA 21 CFR Part 11 guidelines. The StabNet software features a client-server architecture with sophisticated user administration, configurable access rights, automatic data backup, and tamper-proof audit trails, ensuring the highest level of data integrity and security. The database-driven platform allows for the comfortable management of large volumes of data, flexible filtering, sorting, and statistical evaluation of OSI results. Typical applications for this configured system extend beyond crude and refined vegetable or animal oils to include fat-containing foods such as snacks, biscuits, and mayonnaise, as well as cosmetics like sunscreens, lip balms, and lotions. Whether used for incoming goods inspection, stability testing of new formulations, or the quantitative assessment of natural and synthetic antioxidants, the Metrohm 892 Professional Rancimat with PC, software, and supplies provides an unparalleled combination of precision, efficiency, and regulatory compliance.