Stability measurement applications
The oxidation stability is an important indicator of product stability and shelf life. Our application experts have compiled numerous documents on determining the oxidation stability in various samples, such as oils and fats, biodiesel, or pharmaceutical raw materials.
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- AN-R-035Oxidation stability of spices and seasonings with the PEG method
Processing degrades antioxidant levels in spices. The 892 Professional Rancimat determines oxidation stability with the PEG method as per AOCS Cd 12b-92 and ISO 6886.
- AN-R-034Oxidation stability of diesel, biodiesel, and blends
Sustainable biodiesel can be blended with petroleum diesel. The 893 Professional Biodiesel Rancimat measures the oxidation stability of biodiesel and its blends.
- AN-R-033Determination of antioxidant content with PEG as carrier material
Higher antioxidant levels mean longer product viability. The 892 Professional Rancimat determines antioxidant content in many products using a linear regression method.
- AN-R-031Oxidation stability of sausages with PEG
This Application Note describes the determination of the oxidation stability of different sausages with the recommended method from Metrohm using an 892 Professional Rancimat.
- AN-R-032Oxidation stability of sausages after cold extraction
This Application Note describes the determination of the oxidation stability of the fat in different sausages extracted with cold petroleum ether using an 892 Professional Rancimat.
- AN-R-030Oxidation stability comparison of AOCS Cd 12b-92 and EN ISO 6886
The oxidative stability of sunflower oil using AOCS Cd 12b-92, EN ISO 6886, and a method based on EN ISO 6886 from Metrohm are compared. No significant differences are found.
- AN-R-028Oxidation stability of flavored spirits using PEG as carrier material
This Application Note demonstrates the feasibility of the Rancimat method. Reproducible and accurate determination of the oxidation stability of flavored spirits is possible with the 892 Professional Rancimat.
- AN-R-023Oxidation stability of animal feed – Fast determination of oxidation stability without sample preparation
Oxidation stability is an important parameter to assess the quality of animal feed. It provides information about the long-term resistance to degradation of the fatty acids, which can predict the storage stability of the product. Oxidation stability of many animal feeds can be directly and reproducibly measured by the Rancimat method, if polyethylene glycol (PEG) is used as the carrier material.No sample preparation is required for this application. This Application Note describes the determination of oxidation stability of fish food and dog treats. More information on the Rancimat method can be found on the Metrohm website.
- AN-R-015Oxidation stability of suntan oil
Using the Rancimat method, the oxidation stability of suntan oil can be determined reproducibly and reliably.
- AB-232Determination of antioxidant activity in accordance with the Rancimat method
The effectiveness of antioxidants can be expressed as antioxidant activity. It can be readily determined using the Rancimat method. This is accomplished by first determining the induction time of a mixture made up of hog fat and the antioxidant to be investigated and then by determining the corresponding time for hog fat alone. The quotient expresses the efficiency of the respective antioxidant and is referred to as the antioxidant activity index (AAI).This Application describes the determination of the antioxidant activity index of five common antioxidants.
