Dill

 Dill( Anethum graueolens L)  is an annual plant of the Umbelliferae (parsley) family, growing to about one metre in height and bearing typical inflorescences of yellow flowers. Dill,has been used for its ffavour and presumed medicinal properties for many thousands of years. it is still used extensively in Europe and North America. Anethum graveolens  is commonly known as (dill), native to Mediterranean and South Eastern Europe countries. This species is a popular aromatic herb in Iranian, Indian, African, Chinese, Cuban and Mexican cuisines.

The most important medicinal effects of dill oils are due to its antimicrobial and antioxidant activities, and pharmacological properties. Some of these activities are related to the major compound of the oils carvone.

Three types of dill oil are marketed. A sweet dill herb oil can be steam-distilled from the freshly cut stalks of the plant bearing leaves and flowers, and a seed oil is obtained from the separated dry, mature fruits. A high-carvone dill herb oil, with a minimum carvone content of 30–32%, is produced in western Montana and in other locations in the US and Canada. This oil is distilled from the entire plant bearing fully formed but immature fruits.

Uses

The steam-distilled essential oil of dill (Anethum graveolens L.) is widely used for flavoring foods and beverages. Most of the oil is produced in the fruits, although leaves and stems also contain oil. 

Dill seed oil is prepared by distillation from the crushed ripe fruits. Its main constituents are limonene (over 40 %) and (+)-carvone (over 60 %)

The constituent profile of dill oil changes markedly through the growing season. the properties of dill oil depend largely on the proportions of carvone and α-phellandrene, with the characteristics of an herb oil predominating if the carvone content is less than 35%. The aroma of dill herb oil from the leaves and stems of the plant before fruit formation is due to phellandrene and dill ether (3,9-epoxy-1-p-menthene.

 

Distillation Metode

steam distillation

Composition

limonene  and carvone