Lemon grass

Some oils consist almost entirely of esters for example, those of Oaultheria procumhens and Betula lenta contain about 99 per cent, of methyl salicylate. Bergamot and lavender owe the greater part of their perfume value to esters of linalol, of which the acetate predominates. Geranium oil owes its fragrance chiefly to geranyl esters, of which the tiglate is the chief. On the other hand, oils such as spike lavender, sandalwood, lemon-grass, and citronella contain but small quantities of esters, and owe their perfume value to entirely different types of compounds. 

The former is the more probable constitution. Citral as found in commerce, is probably almost invariably a mixture of the two isomers, which are very similar in their general characters. It occurs to a considerable extent in various essential oils, being the principal constituent of lemon-grass oil, and of the oil of Backhmisia citriodora, and occurring to the extent of about 4 to (i irer cent, in lemon oil, which owes its characteristic flavour to this aldehyde. 

The purest specimens which have been prepared of natural citral, either from lemon-grass oil, lemon oil, or the oil of Tetranthem citrata, have the following characters —... 

Methyl-heptenone, CgH, 0, occurs in various essential oils, especially lemon-grass oil, in which it is associated with, and difi cult to separate from, the aldehyde citral. 

A process tor the manufacture of artificial essence of violets consisting in causing lemon-grass oil, alcohol, acetone, and concentrated solutions of salts of hypochlorous acid to react on one another at the boiling temperature. 

Caproic acid.CjHjj. COOH, has been found in lemon-grass, palmarosa, and several other essential oils. It is a liquid having the following characters —... 

The determination of citral in lemon-grass oil by the neutral sulphite absorption process ves results some 4 per cent, lower than those obtained by the bisulphite method, but the latter is that usually adopted in commerce, though, as alreadv stated, the former is official in the new Britiih Pharmacopmia. 

Citral Lemon grass oil, mandarin oil Chelidonic acid Asparagus, Celandine, anemone... 

Cleary, K. and McFeeters R.F., Effects of oxygen and turmeric on the formation of oxidative aldehydes in fresh-pack dill pickles, J. Agric. Food Chem., 54, 3421, 2006. Lean, L.P. and Mohamed S., Antioxidative and antimycotic effects of turmeric, lemon-grass, betel leaves, clove, black pepper leaves and Garcinia atriviridis on butter cakes, J. Sci. Food Agric., 79, 1817, 1999. 

Natural citral is nearly always a mixture of the two isomers. It occurs in lemon-grass oil (up to 85%), in Litsea cubeba oil (up to 75%), and in small amounts in... 

Natural aroma chemicals Isolation and purification via physical processes Citral from lemon grass oil, eugenol from cloves, menthol from Mentha species... 

Lemon-grass Cymbopogon citratus fresh leaves 0.1-0.3 (Graminae/Poaceae)... 

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