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Asked Questions
Q: How many days can plant extract be stored?
A: It depends on the type of bioactive compounds present in your extract. In fact, if your extract contains polyphenolic compounds, I suggest you freeze-dry before keeping in dark and cool condition (better at -40 °C). In this way, you can store the extract for about one year.
Q: How do you make different concentrations of plant extracts?
A: To make your stock solution, weigh out the exact quantity of extract you have. Assuming you have 0.20g of extract, it will be equivalent to 200mg. To make a 100mg/ml stock you just add 1ml to each 100mg of your extract.
Q: Are plant extracts good for you?
A: Fruit extracts from different plants have numerous health benefits that include antioxidant, antidiabetic, antiinflammatory, and antitumoral activity among several other activities.
Q: How do you purify plant extracts?
A: Fractionation and purification of phytochemical substances are achieved through application of various chromatographic techniques such as paper chromatography, thin-layer chromatography, gas chromatography, and high-performance liquid chromatography.
Q: Do extracts go bad?
A: Flavoring extracts can evaporate over time. Most of the shelf life is between 6 months to 1 year, with the exception of pure vanilla extract. Pure vanilla extract can improve with age if stored in a dark cool place. Try these tips to keep your spice rack on track!
Q: Should extracts be refrigerated after opening?
A: What is the shelf life of my vanilla extract? When stored properly, vanilla extract will keep indefinitely, but using it within five years will allow for best flavor and aroma. Do not refrigerate or freeze, even after opening.
Q: Which is the most suitable solvent for purifying plant extract?
A: Methanol was identified as the most effective solvent for the extraction, resulting in the highest extraction yield (33.2%) as well as the highest content of phenolic (13.36 mg GAE/g DW), flavonoid (1.92 mg QE/g DW), alkaloid (1.40 mg AE/g DW), and terpenoids (1.25%, w/w).
Q: What is the yield of plant extracts?
A: Percentage yield of an extract can be calculated by dividing the weight of a dry extract by the weight of the dry plant biomass and multiplying by 100.
Q: How do you choose solvent for plant extraction?
A: The type of solvent depends on the type of phytochemical to be extracted from the plant source. Non-polar solvents such as petroleum ether and n-Hexane are the best solvents for the extraction of monoterpene and sesquiterpene hydrocarbons as well as their oxygenated derivatives.
Q: Are extracts stronger than tinctures?
A: The result is a liquid extract that is up to 5 to 10 times more concentrated than a tincture, which means you get the benefit of a much higher potency herbal product. There are many reasons why people may not want to use herbs with a high alcohol content, such as disliking the taste or alcohol sensitivity.
Q: What chemicals are in plant extracts?
A: Plant extracts contain a varied range of chemicals such as terpenoids, phenolic compounds, alkaloids, glucosinolates, and various organic acids. These chemicals are responsible for their unique nature and perceived biological activity of plant extracts.
Q: What is the purpose of plant extract?
A: Plant extracts have served as an important source of bioactive compounds for many drug discovery programs, and several important drugs have been isolated and identified from plants.
Q: What are the 3 types of extraction?
A: The three most common types of extractions are: liquid/liquid, liquid/solid, and acid/base (also known as a chemically active extraction). The coffee and tea examples are both of the liquid/solid type in which a compound (caffeine) is isolated from a solid mixture by using a liquid extraction solvent (water).
Q: How do you find the concentration of an extract?
A: For the determination of extract concentration you need to evaporate the solvent (by vacuum evaporator or lyophilisator) and than dissolve the crude extract in the known volume. Usually the concentration used is 1 mg/mL so it is easier to compare the result with those published by other authors.
Q: How do you remove chlorophyll from plant extracts?
A: Chlorophyll pigments are readily extracted from botanical matrices by a wide polarity range of organic solvents. They dissolve readily in lipophilic solvents such as petroleum ether, alkanes, chloroform, and to a lesser extent ethyl acetate (EtOAc). They are also soluble in alcohols such as MeOH and EtOH.
Q: Do extracts have to be cooked?
A: Can vanilla extract be eaten raw like in ice cream? Yes, vanilla extract can be used in items that will not be cooked. But, go sparingly. Extracts are very strongly flavored, and even a little too much can ruin a recipe.
Q: Are extracts flammable?
A: Liquid flavorings and extracts, many of which contain alcohol, are flammable and must be stored like other hazardous materials. Some of the properties used in manufacturing flavorings, such as Benzaldehyde, can produce poisonous gas in the event of fire.
Q: Are extracts better than oils?
A: While their benefits may not be as concentrated as essential oils, extracts can be used in higher quantities and tend to be gentler on the skin, while still providing the benefits of the plants from which they are derived.
Q: Can vanilla paste expire?
A: Store it: Vanilla paste can be stored for up to 3 years when kept in a cool, dark environment. Do not refrigerate your paste, or the container will form condensation and spoil the vanilla. Ready to stock up on vanilla paste?
Q: How long are pure extracts good for?
A: We looked at the storage recommendations from several flavoring manufacturers and they say that extracts tend to have a shelf life of 6 months to 1 year. The exception to this is pure vanilla extract which, if stored in a cool dark place and tightly sealed, can last indefinitely and even improve with age.
Inquiry
As one of the leading plant extracts manufacturers and suppliers in China, we warmly welcome you to wholesale bulk high quality plant extracts in stock here from our factory. All our products are with high quality and competitive price. For free sample, contact us now

The creation of the Beton Nutrition Corporation arises from Riotto, began by the end of 2010, is a leading manufacturer of plant extracts, fruit & vegetable juice powder, organic products for years.
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