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10A-Isolation of Limonene from Citrus Fruit

10A-Isolation of Limonene from Citrus Fruit - 10A Isolation...

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10A: Isolation of Limonene from Citrus Fruits Author: Christine Le Lab Instructor: Kyle Malhotra Course: Chem. 243A—03 Date Performed: 4/5/10 Date Submitted: 4/12/10 Abstract : In this experiment, limonene was extracted from the peels of lemons by using steam distillation. The sample of limonene that was recovered was 3.136g. This was then submitted for gas chromatography analysis and an IR test. There is a peak at 0.650 minutes and it is evident that there are alkanes at 3479.07 cm-1. Both sets of data had supporting evidence to show that the sample of limonene was almost pure.
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Introduction : Terpenes are compounds that are frequently extracted from the oils of plants in many industries today due to its useful purposes. Some of these purposes include the production of fragrances, flavors, foods, and even cleaning products. When a compound consists of two or more isoprene units, the new structure is called a monoterpene. A type of monoterpene that is usually found in citrus fruits, dill, and caraway is limonene. In the industrial world, limonene can be used in many forms such as fragrance, flavor, solvents, polymers, and adhesives. Limonene has two structures that are mirror images of each other; however, they are completely different in many features. These two structures are called enantiomers. R(+)—enantiomer of limonene is usually found in the zest peelings of oranges and the S(-)—enantiomer is generally found in lemons. In addition to the steam distillation performed on the mixture of the peelings of the citrus fruits, a refractive index will be measured.
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