892 Professional Rancimat
20Pages

Determination of the oxidation stability of • Oils and fats • Fat-containing foods • Cosmet

The 892 Professional Rancimat and StabNet in brief 02 The 892 Professional Rancimat, in conjunction with StabNet software, is a modern analytical system for easy and reliable determination of the oxidation stability of natural oils and fats using the long-established Rancimat method. The 892 Professional Rancimat is controlled via the PC by StabNet software. Determination itself, however, can be started very conveniently directly on the instrument. Each measuring position has its own individual start button. In addition, the integral color display provides an overview of the status of each...

The most important advantages at a glance The instrument • All instrument functions controlled via PC • Separate starting of each measuring position directly on the instrument • Overview of the status of all measuring positions on the instrument display • Unparalleled reliability and simple operation due to unique accessories - Affordable disposable glass parts - Robust conductivity cells with electrical connections integrated in the reaction vessel cover • 2 heating blocks with 8 measuring positions per instrument. Up to 4 instruments can be connected to 1 PC The software • Clearly...

Oxidation stability of oils and fats 04 The determination of the oxidation stability of oils and fats is the classical application for the 892 Professional Rancimat. The term oxidation stability denotes the resistance of oils and fats to oxidation. In the Rancimat method, oxidation is accelerated by means of heating up the reaction vessel and by passing air continuously through the sample. This process causes the fatty acid molecules in the sample to oxidize. First, peroxides form as primary products of oxidation. After some time the fatty acids are completely destroyed and secondary...

Standards The Rancimat method is included in various national and international standards, such as: • AOCS Cd 12b-92 (AOCS – American Oil Chemists’ Society) Sampling and analysis of commercial fats and oils: Oil Stability Index • ISO 6886 Animal and vegetable fats and oils – Determination of oxidative stability (accelerated oxidation test) • 2.4.28.2-93 Fat stability test on Autoxidation. C

Oxidation stability of foods Many foods contain oils and fats, either naturally or as a result of production. Just like the pure substances, the hidden oils and fats are also subject to oxidation, which contributes to their spoilage. Thus, the 892 Professional Rancimat can also be used to determine the oxidation stability of foods containing oils and fats. Foods with a very high fat content can often be analyzed directly. The only preparation required is a reduction in the size of the sample particles. In the case of foods with a high proportion of water or proteins in addition to fat, the...

Oxidation stability of cosmetics Many natural cosmetics and other high-quality cosmetic products contain a substantial proportion of vegetable oils and fats. For example, cocoa butter is an ingredient in many lip and body care products. In contrast to paraffin-based products, these cosmetics spoil over time, partly as a result of the oxidation of the vegetable fats contained. Depending on the proportion of fat, the samples can be measured directly with the 892 Professional Rancimat or the isolated fat can be measured after cold extraction with petroleum ether. Typical examples of...

Start buttons on the instrument Next to each measuring position there is a button with which determination can be started immediately after the sample has been placed in the heating block. The start button is completely sealed on the outside, so no liquids such as oil or water can enter. Triggering is achieved with the help of capacitive finger detection and also works with gloves. Instrument display The status of the instrument and of each individual measuring position can be watched on the color instrument display. It shows the temperature of the two heating blocks, the gas flow, the...

StabNet – modern software for stability measurements 10 StabNet is the modern and user-friendly software for carrying out stability measurements and archiving the measurement data. The characteristic features of StabNet are its ease of use and flexibility. This is evident already in the «Workplace» part of the program, where the day-to-day work is done. Here users will find all the elements that are needed to carry out determinations. The structure of the «Workplace» shows the setup of the 892 Professional Rancimat with its 2 heating blocks and the 8 measuring positio

For each heating block it is possible to load an individual method in which, amongst other things, the temperature and gas flow are defined. The heating is switched on manually in the «Workplace» part of the program. The heating can also be started automatically, and very conveniently, at a defined time with the help of a timer; the instrument will then be ready for use right on the start of the working day. For each measuring position on the instrument there is a live display in the «Workplace» part of the program. The flashing Start/Stop button indicates a determination is running. From...

Completed determinations are stored in a database. In the «Database» part of the program it is possible to view the determinations including all the determination, method and instrument parameters. The determination overview is freely configurable, so all measurement results can be scanned easily. The subwindows «Curve» and «Information» display the measurement curve and other information on the determination, as well as method and instrument parameters for each determination that is selected. Convenient sort, search and filter functions make it easy to find data quick

Recalculation of determinations Should it ever be necessary, determinations can also be processed at a later time, either by recalculation with different evaluation parameters or by manual evaluation of the curve with tangents. The original data are not lost. All versions of the determination are archived. Using the History function it is possible to restore the original version or any interim version or the final version at any time. Report creation The report generator offers complete freedom when it comes to creating the analysis report, whether it be an individual report with all the...