Extract
Encyclopedia
An extract is a substance made by extracting
a part of a raw material
, often by using a solvent
such as ethanol
or water
. Extracts may be sold as tincture
s or in powder form.
The aromatic principles
of many spices, nuts, herbs, fruits, etc., and some flowers, are marketed as extracts, among the best known of true extracts being almond
, cinnamon
, cloves, ginger
, lemon
, nutmeg
, orange
, peppermint
, pistachio
, rose
, spearmint
, vanilla
, violet
, and wintergreen
.
from the blossoms, fruit, roots, etc., or the whole plants, through four techniques:
The distinctive flavors of nearly all fruits, in the popular acceptance of the word, are desirable adjuncts to many food preparations, but only a few are practical sources of sufficiently concentrated flavor extract. The most important among those that lend themselves to "pure" extract manufacture include lemons, oranges, and vanilla beans.
, cherry
, currant
, peach
, pineapple
, raspberry
and strawberry
, are produced by combinations of various ester
s, together with special oils. The desired colors are generally obtained by the use of dye
s. Among the esters most generally employed are ethyl acetate
and ethyl butyrate
. The chief factors in the production of artificial banana and pineapple extract, and also important in the manufacture of strawberry extract, are amyl acetate
and amyl butyrate, amyl alcohol
being the principal constituent of that part of the alcohol
obtained by the distillation
of grain
and potato starch
, which is popularly known in the US as fusel oil and in Europe, generally by the title of potato oil.
Artificial extracts generally do not possess the delicacy of natural fruit flavor, but usually get close enough to provide real service and convenience when true essences are unobtainable or too expensive.
Extraction (chemistry)
Extraction in chemistry is a separation process consisting in the separation of a substance from a matrix. It may refer to Liquid-liquid extraction, and Solid phase extraction....
a part of a raw material
Raw material
A raw material or feedstock is the basic material from which a product is manufactured or made, frequently used with an extended meaning. For example, the term is used to denote material that came from nature and is in an unprocessed or minimally processed state. Latex, iron ore, logs, and crude...
, often by using a solvent
Solvent
A solvent is a liquid, solid, or gas that dissolves another solid, liquid, or gaseous solute, resulting in a solution that is soluble in a certain volume of solvent at a specified temperature...
such as ethanol
Ethanol
Ethanol, also called ethyl alcohol, pure alcohol, grain alcohol, or drinking alcohol, is a volatile, flammable, colorless liquid. It is a psychoactive drug and one of the oldest recreational drugs. Best known as the type of alcohol found in alcoholic beverages, it is also used in thermometers, as a...
or water
Water
Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state . Water also exists in a...
. Extracts may be sold as tincture
Tincture
A tincture is an alcoholic extract or solution of a non-volatile substance . To qualify as a tincture, the alcoholic extract is to have an ethanol percentage of at least 40-60%...
s or in powder form.
The aromatic principles
Aroma compound
An aroma compound, also known as odorant, aroma, fragrance or flavor, is a chemical compound that has a smell or odor...
of many spices, nuts, herbs, fruits, etc., and some flowers, are marketed as extracts, among the best known of true extracts being almond
Almond
The almond , is a species of tree native to the Middle East and South Asia. Almond is also the name of the edible and widely cultivated seed of this tree...
, cinnamon
Cinnamon
Cinnamon is a spice obtained from the inner bark of several trees from the genus Cinnamomum that is used in both sweet and savoury foods...
, cloves, ginger
Ginger
Ginger is the rhizome of the plant Zingiber officinale, consumed as a delicacy, medicine, or spice. It lends its name to its genus and family . Other notable members of this plant family are turmeric, cardamom, and galangal....
, lemon
Lemon
The lemon is both a small evergreen tree native to Asia, and the tree's ellipsoidal yellow fruit. The fruit is used for culinary and non-culinary purposes throughout the world – primarily for its juice, though the pulp and rind are also used, mainly in cooking and baking...
, nutmeg
Nutmeg
The nutmeg tree is any of several species of trees in genus Myristica. The most important commercial species is Myristica fragrans, an evergreen tree indigenous to the Banda Islands in the Moluccas of Indonesia...
, orange
Orange (fruit)
An orange—specifically, the sweet orange—is the citrus Citrus × sinensis and its fruit. It is the most commonly grown tree fruit in the world....
, peppermint
Peppermint
Peppermint is a hybrid mint, a cross between the watermint and spearmint . The plant, indigenous to Europe, is now widespread in cultivation throughout all regions of the world...
, pistachio
Pistachio
The pistachio, Pistacia vera in the Anacardiaceae family, is a small tree originally from Persia , which now can also be found in regions of Syria, Lebanon, Turkey, Greece, Kyrgyzstan, Turkmenistan, India, Pakistan, Egypt, Sicily and possibly Afghanistan , as well as in the United States,...
, rose
Rose
A rose is a woody perennial of the genus Rosa, within the family Rosaceae. There are over 100 species. They form a group of erect shrubs, and climbing or trailing plants, with stems that are often armed with sharp prickles. Flowers are large and showy, in colours ranging from white through yellows...
, spearmint
Spearmint
Mentha spicata syn. M. cordifolia is a species of mint native to much of Europe and southwest Asia, though its exact natural range is uncertain due to extensive early cultivation. It grows in wet soils...
, vanilla
Vanilla
Vanilla is a flavoring derived from orchids of the genus Vanilla, primarily from the Mexican species, Flat-leaved Vanilla . The word vanilla derives from the Spanish word "", little pod...
, violet
Violet (plant)
Viola is a genus of flowering plants in the violet family Violaceae, with around 400–500 species distributed around the world. Most species are found in the temperate Northern Hemisphere; however, viola species are also found in widely divergent areas such as Hawaii, Australasia, and the Andes in...
, and wintergreen
Wintergreen
Wintergreen is a group of plants. Wintergreen once commonly referred to plants that continue photosynthesis throughout the winter...
.
Extraction techniques
The majority of natural essences are obtained by extracting the essential oilEssential oil
An essential oil is a concentrated hydrophobic liquid containing volatile aroma compounds from plants. Essential oils are also known as volatile oils, ethereal oils or aetherolea, or simply as the "oil of" the plant from which they were extracted, such as oil of clove...
from the blossoms, fruit, roots, etc., or the whole plants, through four techniques:
- ExpressionFruit pressA fruit press is a device used to separate fruit solids - stems, skins, seeds, pulp, leaves, and detritus - from fruit juice.-Cider press:A cider press is used to crush apples or pears...
when the oil is very plentiful and easily obtained, as in lemon peel. - AbsorptionSteepingSteeping or weltering may mean:# Saturation in a liquid solvent to extract a soluble ingredient, where the solvent is the desired product. Tea is prepared for drinking by steeping the leaves in heated water to release the flavor and nutrients...
is generally accomplished by steepingSteepingSteeping or weltering may mean:# Saturation in a liquid solvent to extract a soluble ingredient, where the solvent is the desired product. Tea is prepared for drinking by steeping the leaves in heated water to release the flavor and nutrients...
in alcohol, as vanilla beans. - Maceration is used to create smaller bits of the whole, as in making peppermint extract, etc.
- DistillationDistillationDistillation is a method of separating mixtures based on differences in volatilities of components in a boiling liquid mixture. Distillation is a unit operation, or a physical separation process, and not a chemical reaction....
is used with maceration, but in many cases, it requires expert chemical knowledge and the erection of costly stills.
The distinctive flavors of nearly all fruits, in the popular acceptance of the word, are desirable adjuncts to many food preparations, but only a few are practical sources of sufficiently concentrated flavor extract. The most important among those that lend themselves to "pure" extract manufacture include lemons, oranges, and vanilla beans.
Chemical-created essence
A majority of other, concentrated fruit flavors, such as bananaBanana
Banana is the common name for herbaceous plants of the genus Musa and for the fruit they produce. Bananas come in a variety of sizes and colors when ripe, including yellow, purple, and red....
, cherry
Cherry
The cherry is the fruit of many plants of the genus Prunus, and is a fleshy stone fruit. The cherry fruits of commerce are usually obtained from a limited number of species, including especially cultivars of the wild cherry, Prunus avium....
, currant
Ribes
Ribes is a genus of about 150 species of flowering plants native throughout the temperate regions of the Northern Hemisphere. It is usually treated as the only genus in the family Grossulariaceae. Seven subgenera are recognized....
, peach
Peach
The peach tree is a deciduous tree growing to tall and 6 in. in diameter, belonging to the subfamily Prunoideae of the family Rosaceae. It bears an edible juicy fruit called a peach...
, pineapple
Pineapple
Pineapple is the common name for a tropical plant and its edible fruit, which is actually a multiple fruit consisting of coalesced berries. It was given the name pineapple due to its resemblance to a pine cone. The pineapple is by far the most economically important plant in the Bromeliaceae...
, raspberry
Raspberry
The raspberry or hindberry is the edible fruit of a multitude of plant species in the genus Rubus, most of which are in the subgenus Idaeobatus; the name also applies to these plants themselves...
and strawberry
Strawberry
Fragaria is a genus of flowering plants in the rose family, Rosaceae, commonly known as strawberries for their edible fruits. Although it is commonly thought that strawberries get their name from straw being used as a mulch in cultivating the plants, the etymology of the word is uncertain. There...
, are produced by combinations of various ester
Ester
Esters are chemical compounds derived by reacting an oxoacid with a hydroxyl compound such as an alcohol or phenol. Esters are usually derived from an inorganic acid or organic acid in which at least one -OH group is replaced by an -O-alkyl group, and most commonly from carboxylic acids and...
s, together with special oils. The desired colors are generally obtained by the use of dye
Dye
A dye is a colored substance that has an affinity to the substrate to which it is being applied. The dye is generally applied in an aqueous solution, and requires a mordant to improve the fastness of the dye on the fiber....
s. Among the esters most generally employed are ethyl acetate
Ethyl acetate
Ethyl acetate is the organic compound with the formula CH3COOCH2CH3. This colorless liquid has a characteristic sweet smell and is used in glues, nail polish removers, and cigarettes...
and ethyl butyrate
Ethyl butyrate
Ethyl butyrate, also known as ethyl butanoate, or butyric ether, is an ester with the chemical formula CH3CH2CH2COOCH2CH3. It is soluble in propylene glycol, paraffin oil, and kerosene. It has a fruity odor, similar to pineapple.-Uses:...
. The chief factors in the production of artificial banana and pineapple extract, and also important in the manufacture of strawberry extract, are amyl acetate
Amyl acetate
Amyl acetate is an organic compound and an ester with the chemical formula CH3COO[CH2]4CH3 and the molecular weight 130.19 g/mol. It has a scent similar to bananas and apples which is not detectable by all people. The compound is the condensation product of acetic acid and 1-pentanol...
and amyl butyrate, amyl alcohol
Amyl alcohol
An amyl alcohol is any of 8 alcohols with the formula C5H11OH. A mixture of amyl alcohols can be obtained from fusel alcohol. Amyl alcohol is used as a solvent and in esterfication for example in the production of amyl acetate...
being the principal constituent of that part of the alcohol
Alcohol
In chemistry, an alcohol is an organic compound in which the hydroxy functional group is bound to a carbon atom. In particular, this carbon center should be saturated, having single bonds to three other atoms....
obtained by the distillation
Distillation
Distillation is a method of separating mixtures based on differences in volatilities of components in a boiling liquid mixture. Distillation is a unit operation, or a physical separation process, and not a chemical reaction....
of grain
GRAIN
GRAIN is a small international non-profit organisation that works to support small farmers and social movements in their struggles for community-controlled and biodiversity-based food systems. Our support takes the form of independent research and analysis, networking at local, regional and...
and potato starch
Potato starch
Potato starch is starch extracted from potatoes. The cells of the root tubers of the potato plant contain starch grains . To extract the starch, the potatoes are crushed; the starch grains are released from the destroyed cells...
, which is popularly known in the US as fusel oil and in Europe, generally by the title of potato oil.
Artificial extracts generally do not possess the delicacy of natural fruit flavor, but usually get close enough to provide real service and convenience when true essences are unobtainable or too expensive.