Oxidation Stability of Biodiesel and ­Biodiesel Blends

A standardised quality parameter to avoid motor damage can be easily determined with the highly reliable Biodiesel Rancimat from Metrohm. In addition to other alternative fuels such as ethanol, methanol or biogas (methane), fatty acid methyl esters are increasingly found on the market. Fatty acid methyl esters are relatively unstable on storage, they are slowly oxidised by atmospheric oxygen. The substances produced in this way could cause motor damage. This is why the oxidation stability is an important quality criterion for biodiesel; it is regularly determined during the production process. With the 873 Biodiesel Rancimat from Metrohm, this determination can be carried out quickly and simply. The oxidation process can be delayed by the addition of antioxidants. It can also be used to determine the effectiveness of antioxidants. The 873 Biodiesel Rancimat is a compact instrument and has two heating blocks with eight measuring positions. Each channel can be started independently. Up to four instruments can be connected to one PC.