Some of the refractive indices of important oils are described below at 20ºC. The presence of … 317 324. 0000008570 00000 n
Canola refers to edible oil which recently is also used to produce biodiesel. Peanut Oil: 1.460 - 1.465 Content from video platforms and social media platforms is blocked by default. Sunflower oil, crude mid-oleic . 52 0 obj
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The Abbemat 550 refractometer is ideal for determining the oleic and linoleic acid content in peanut oils and peanut seeds. Many materials have a well-characterized refractive index, but these indexes depend strongly upon the frequency of light. 0000008086 00000 n
The value of RI increased with oleic acid content added in vegetable oil. The varying composition of different oils and fats allows for them to be characterized by refractive index measurement. Moreover, it helps to differentiate between different fats, such as butter and margarine. Rapeseed oil (HEAR) 278 - 282. There are also weaker dependencies on temperature, pressure/stress, etc., as well on precise material compositions (presence of dopants, etc. International regulations such as the official method 921.08 "Index of Refraction of Oils and Fats" from the AOAC, ISO 6320:200 "Animal and Vegetable Fats and Oils" demand the measurement of oils and fats either with an Abbe refractometer or with a butyro refractometer. Download historical data for 20 million indicators using your browser. for the shopping cart), others help us make our online content better and easier for you over the long term via analysis, external media, and marketing services. Manage your online orders and purchase settings, Get full access to download all documents, Pharmaceutical instrument qualification service, Peltier thermostat: The refractive index is dependent on the temperature of the sample.To ensure precise results the temperature is controlled by the, Measurement accuracy: Depending on the chosen. Necessary cookies enable the basic functioning of the website. 0000004361 00000 n
We collect and combine data on our visitors and their behavior on our website. The refractive index or butyro reading of oils and fats can easily be measured with an Abbemat refractometer. Each oil has a specific refractive index measured at a certain temperature, so we can differentiate them. Marketing cookies are used by third parties or publishers to show you personalized advertising. 0000006988 00000 n
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Along with carbohydrates and proteins, fats and oils belong to the basic building blocks of human nutrition. 0000007009 00000 n
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Some of them are necessary (e.g. The determination coefficient for each brand of oil ranged from 0.94 to 0.99 except brand B of canola oil (0.916 in Fig. Watch Queue Queue. (��Bơ
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