Tomato seed oil is a vegetable oil extracted from the seeds of tomatoes.
The possibility of extracting oil from tomato seeds was studied in the USA in 1914. Seeds were obtained from a variety of locations and pressed to produce oil. This was refined using an alkali and then clarified with fuller's earth. The resulting oil was pale yellow and considered suitable for dressing salads. [1]
The seeds have been given renewed attention as there is pressure to utilise the waste products of tomato processing, in which seeds are the largest component. In Greece, over a million tons of tomatoes are processed each year and the resulting quantity of seeds might be used to produce up to 2000 tons of oil. The oil from Greek seeds has been extracted by using ether as a solvent. When analysed, it was found to contain a high proportion of unsaturated fatty acids, especially linoleic acid. [2]
Tomato belongs to the family Solanaceae.
species: Solanum lycopersicum.
Soil: sandy to heavy clay, pH 6.0-7.0. well drained, light.
Plant: an unarmed spreading, pubescent herb with characteristic odour.
Cultivation: It is cultivated all over India. Major states are Maharashtra, Bihar, Karnataka, U.P, Orissa, Andhra Pradesh, Madhya Pradesh, and Assam.
Climate: Climate should be warm with plenty of moisture and sunshine.
Contains: 8.95% moisture, 27.62% protein, 24.40% fat, 0.56% lecithin, 13.60% fiber, and 40.20% of ash. N-free extracts are present up to 21%. Seeds form only 0.5% of tomato. Seeds are waste products in food industries manufacturing tomato juice, sauce, ketchup and food colours such as lycopene and beta carotene. Seeds are recovered from discarded waste product by flotation. In India the potential availability of seeds will be 7500 tonnes per annum.
Substance | Percentage(%) |
Moisture | 10.0 |
Oil(fat) | 24-25 |
Proteins | 27-28 |
Fibre | 13-14 |
Lecithin | 0.56 |
N-free Extract | 21 |
Tomato seed contains 24-25% of oil, but 15-17% oil can be recovered by crushing in expellers. Tomato oil is brown in color with strong odour. It contains saturated fatty acids up to 14-18%, and unsaturated fatty acids up to 76-80%. Fatty acid composition of Tomato Seed oil [3]
Fatty acids | percentage(%)up to |
stearic acid (C18:0) | 20.0% |
Oleic acid (C18:1) | 25.0% |
Linoleic acid (C18:2) | 50.0% |
Linolenic acid (C18:3) | 2.0-3.0% |
Specifications of crude Tomato seed Oil [3]
character | value |
Refractive Index at 400C | 1.4603±0.00022 |
Iodine Value | 105±0.7 |
Saponification value | 186-198 |
Unsaponifiable matter | 1.4% max |
Moisture | 0.5%max |
Color 1" cell,(y+5R) | 30(crude Oil) |
density, at 25° | 0.9160±0.00024 |
viscosity,(21 °C)mPa.s | 75±0.4 |
Smoke point,°C | 176±63.0 |
Vegetable oils, or vegetable fats, are oils extracted from seeds or from other parts of fruits. Like animal fats, vegetable fats are mixtures of triglycerides. Soybean oil, grape seed oil, and cocoa butter are examples of fats from seeds. Olive oil, palm oil, and rice bran oil are examples of fats from other parts of fruits. In common usage, vegetable oil may refer exclusively to vegetable fats which are liquid at room temperature. Vegetable oils are usually edible; non-edible oils derived mainly from petroleum are termed mineral oils. Vegetable oil sold in the U.S. is normally synonymous with soybean oil.
Coconut oil is an edible oil derived from the wick, meat, and milk of the coconut palm fruit. Coconut oil is a white solid fat, melting at warmer room temperatures of around 25 °C (78 °F), in warmer climates during the summer months it is a clear thin liquid oil. Unrefined varieties have a distinct coconut aroma. It is used as a food oil, and in industrial applications for cosmetics and detergent production. Due to its high levels of saturated fat, numerous health authorities recommend limiting its consumption as a food.
Linseed oil, also known as flaxseed oil or flax oil, is a colourless to yellowish oil obtained from the dried, ripened seeds of the flax plant. The oil is obtained by pressing, sometimes followed by solvent extraction. Linseed oil is a drying oil, meaning it can polymerize into a solid form. Owing to its polymer-forming properties, linseed oil can be used on its own or blended with combinations of other oils, resins or solvents as an impregnator, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and hardener in putty, and in the manufacture of linoleum. Linseed oil use has declined over the past several decades with increased availability of synthetic alkyd resins—which function similarly but resist yellowing.
Grape seed oil is a vegetable oil derived from the seeds of grapes. A by-product of the winemaking industry, it is typically used for edible applications.
Cottonseed oil is cooking oil from the seeds of cotton plants of various species, mainly Gossypium hirsutum and Gossypium herbaceum, that are grown for cotton fiber, animal feed, and oil.
Pumpkin seed oil is a culinary oil, used especially in central Europe.
Corn oil is oil extracted from the germ of corn (maize). Its main use is in cooking, where its high smoke point makes refined corn oil a valuable frying oil. It is also a key ingredient in some margarines. Corn oil is generally less expensive than most other types of vegetable oils.
Soybean oil is a vegetable oil extracted from the seeds of the soybean. It is one of the most widely consumed cooking oils and the second most consumed vegetable oil. As a drying oil, processed soybean oil is also used as a base for printing inks and oil paints.
Sunflower oil is the non-volatile oil pressed from the seeds of sunflower. Sunflower oil is commonly used in food as a frying oil, and in cosmetic formulations as an emollient.
Macadamia oil is the non-volatile oil collected from the nuts of the macadamia, a native Australian plant. It is used in food as a frying or salad oil, and in cosmetic formulations as an emollient or fragrance fixative.
Sea buckthorn oil is a red–orange oil derived from sea buckthorn plants. The most commonly used species for this purpose is Hippophae rhamnoides. Species belonging to this genus accumulate lipids in the mesocarp, so the oil can be extracted from either the seeds or the pulp.
Watermelon seed oil is extracted by pressing from the seeds of the Citrullus lanatus (watermelon). It is particularly common in West Africa, where it is also called ootanga oil. The common watermelon most likely originated almost 5,000 years ago in the Kalahari Desert of Africa where botanists have found its wild ancestors, known as the Kalahari Melon, still growing. Watermelons migrated north through Egypt, and during the Roman era they were cultivated and prized. Traditionally, the seeds are extracted from the seed casing, and dried in the sun. Once dried, the seeds are pressed to extract the oil.
Vateria indica oil is extracted from the seeds of the Vateria indica plant, a species in the family Dipterocarpaceae. The Vateria indica plant is indigenous to the Western Ghats, Kerala and Tamil Nadu regions of India. It thrives in the evergreen forests, surviving up to 800 meters above sea level. Oil from the seeds of the plant is extracted through a chemical refining process which makes the plant edible.
Nagkesar oil is extracted from seeds of the nagkesar tree. It belongs to the Calophyllaceae family. It is an East Indian evergreen tree and is often planted as an ornamental for its fragrant white flowers that yield a perfume. It is the source of hardwood used for railroad ties. It is Sri Lanka's national tree.
Shorea robusta seed oil is an edible oil extracted from the seeds of Shorea robusta. Shorea robusta is known as the Sal tree in India. Sal is indigenous to India and occurs in two main regions separated by the Gangetic Plain, namely the northern and central Indian regions. The plant belongs to the Dipterocarpaceae botanical family.
Phulwara oil is extracted from seeds of Phulwara tree. Phulwara Trees are also known locally as Chiuri Trees, Kaeleb Trees, or Butter Nut Trees. Refined Phulwara Oil is marketed as Phulwara Ghee.
Ambadi seed oil is extracted from seeds of the ambadi plant. It is an annual or perennial plant in the family Malvaceae and related to the roselle. It is believed to be native to Africa or Tropical Asia.
Pilu oil is an extract from seeds of the Pilu tree, also known as the toothbrush tree. It is used for soaps, detergents, and resist dyeing.
Cooking oil is plant, animal, or synthetic fat used in frying, baking, and other types of cooking. It is also used in food preparation and flavoring not involving heat, such as salad dressings and bread dippings like bread dips, and may be called edible oil.
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