Plant extract refers to the use of appropriate solvent or method from plant (plant part or as a whole) as raw material extraction or processing of substances that can be used to improve health or other purposes.
The plant extract industry is developed in the last 10 years, is the chief in the pharmaceutical, fine chemicals, agricultural sector between the edge of the industry. Its definition is stated as follows:
The plant extract is based on plants as pharmaceutical raw materials in accordance with the need for the use of the extract of the final product, after the physical and chemical extraction and separation process, directed to obtain and concentration plants in one or a variety of active ingredients, without changing its active ingredient structure and the formation of the product. At present, the plant extracts in the product concept is quite broad. Accordance with the extracted plant ingredients are different, the formation of glycosides, acid, polyphenols, polysaccharides, terpenes, flavonoids, alkaloids and other vegetable oils, extracts, powder, lens, etc.; in accordance with the different characters of the final product can be divided into.
Chinese plant extracts are in general intermediate products, currently uses a very wide range, mainly for drugs, health food , tobacco, cosmetics, raw materials or accessories, etc. . Types of plants for the extraction of raw materials is also very much into the industrial extraction plant varieties in more than 300 kinds.
Well known in the history of human civilization, most of the time about 200 years ago, mankind has been dependent on traditional medicines (including botanicals) struggle with the disease for more than 90%. Major ancient civilization and a certain degree of civilization of the nation almost has its own national medical care system, especially China's most comprehensive Chinese medicine system, the biggest achievement. It can be said that the Chinese medicine system in China is the highest expression of the ancient medical science.
Registered pharmacist Suzy Cohen reveals that red clover extract may help some women who are experiencing hot flashes. On the other hand, fennel extract may be the solution for some women who are suffering from menstrual cramps. Plants are able to treat or help multiple conditions such as the fight against obesity, and the extract from the Indian Coleus plant offers forskolin health benefits that include weight loss.
Many plant extracts are viewed as natural remedies, but they can still be found on store shelves in neatly packaged bottles next to the vitamins or minerals. Their availability contributes to the large health industry that has formed around natural treatments. Although it is still important to read labels, research ingredients and check recalls, more people are turning to plants as their salvation.
Nature offers a large selection of plants that can heal or help many health problems. However, discovering the benefits of each plant extract continues to be a challenge while regulations often add more obstacles. Nevertheless, a registered pharmacist recently shared her list of beneficial plants and herbs for a variety of medical conditions.
About product quality
Zelang Group enhances the competitiveness of our products. We are one of China's most outstanding enterprises in Natural Antioxidant and therefore well renowned.
Zelang owns advanced Herbal extract manufacturing and processing base. we can control the quality of every herbal extract from experiment to production, and provide a quality safeguard to every customer of us.
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All about plant extraction
AN ACTIVITY BASED ON RIGOROUS STANDARDS
We are dedicated to extracting active principles from plants. However, the term "extract" is often improperly used, since not all separation processes enable obtaining a plant extract. Through Berkem's exacting approach, you will learn just how extensive the company's contribution is.
An alliance of science and tradition
The origin of extracting active principles from plants is lost in the night of time. Humans learned very early about plant benefits and developed the first techniques to obtain what we now call an "extract". These first extracts were obtained mainly from water-based processes or alcohol fermentation using procedures such as infusion, maceration, decoction or distillation.
The simplicity of these first procedures, as well as the tools, materials and ways of heating, required experience and know-how rather than science.
Even today, in spite of precise automation, more adequate equipment, advances in process engineering and analysis, as well as new extraction technologies such as high pressure, microwaves or ultrasound, the notion of plant extraction expertise still rests on the proper association between the mastery of current technology and tradition.
What is a plant extract?
A plant extract must, by definition, be obtained from a solid-liquid extraction.
Solid-liquid extraction is defined as an operation to separate elements contained in a solid body by solubilization with a solvent, and it may be followed by purification.
The extract is contained in the solvent. If the solvent is an edible solvent, it is not necessary to dissociate it from the extract. If the solvent is not an edible solvent, separation allows obtaining a dry extract.
What are the quality criteria?
Selection of raw materials, choice of solvent, process utilization and equipment performance are determining factors. These multiple parameters must be professionally combined. Only their proper combination allows obtaining high-quality plant extracts.
A SAGA OF HISTORY AND NATURE
Following the approach of modern phytotherapy, Berkem elaborates traditional plant extracts that respect plant integrity.
The oldest and largest floral reserve
Over 200,000 plant species have now been identified, but only one percent of existing plants have been studied scientifically.
A passing fad for some, an alternative medicine for others, phytotherapy is the oldest form of medical treatment. For centuries, humans have searched out the secrets of plants.
This began around 3000 B.C. In the sixth century B.C., Hippocrates used plants as a remedy. The first book on medical treatments using plants was written at the time of the crusades and monks cultivated medicinal gardens.
Phytotherapy in the twentieth century combines tradition and technology to provide greater guarantees.
Phytotherapy is the result of thousands of years of experience and is now scientifically supported.
Backed by clinical and pharmacological studies, the success of current phytotherapy results from improved knowledge of plants and a qualitative selection of the varieties used.
Progress in extraction methods leads to improved conservation of plant integrity.
New plant properties have been discovered. Methods of administration have been multiplied and modernized (tablets, capsules, etc.) to meet new consumer demands.
With this in mind, Berkem uses new equipment technology for the extraction process to offer you high-quality extracts and a personalized solution according to your needs and expectations.
DEFINITION OF PLANT EXTRACTS
The definition of plant extracts is vague for some. Simple powders made from crushed plants are often commercially known as "extracts," undoubtedly because of the fact that water is removed from the plants through a drying process.
Thus, before we can talk about extracts, we need to recall the technical definition of extraction.
Figure 1 below presents different separation procedures with results that are truly or erroneously identified as extracts.
A box indicates the extraction procedures using raw plant materials. These processes obtain a liquid from a solid origin, in contrast to purification processes that always need a solubilization step.
Except for the case of pressing, where ingredients of liquid origin are extracted, an extract is obtained only from a solid-liquid extraction, which may be followed by purification.
Using this definition, we can establish a general diagram of solid-liquid extraction (Figure 2). The contact phase corresponds to the mass transfer step. The first phase of separation cannot be dissociated from the contact phase because it enables separating the used solid from the enriched solvent, usually by simple filtration. At this stage, the extract is contained in the solvent.
If the solvent is edible, it is not necessary to proceed to a second separation that removes the solvent and leaves a dry extract. The example of coffee, probably the most-consumed extract in Europe, illustrates this process.
Coffee (the raw material) is put in contact with water in a percolator at a certain temperature and for a certain length of time. The first separation is done with a paper filter, which enables drinking the coffee directly. If we do another separation, we obtain instant coffee.
This diagram of a solid-liquid extraction has five different steps:
› Maceration, where the contact phase is maintained at room temperature
› Decoction, where the contact phase is maintained at the boiling temperature of the solvent.
› Digestion, where the contact phase is maintained at a temperature between the first two temperatures.
› Infusion, where boiling solvent is poured over the solid and is left to cool for a certain length of time.
› Lixiviation or percolation, where the solvent passes through the biomass.
There is no other way to carry out a solid-liquid extraction. However, it is often possible to:
› Combine these processes with each other or with other procedures such as distillation, steam distillation, rectification, etc.
› Use different solvents successively or mixed together.
› Assist the extraction process with high pressure (supercritical CO2), microwaves, ultrasounds, etc.
The combination of these parameters gives rise to an almost limitless number of different extracts. This is especially true since intrinsic extraction parameters such as temperature, pressure, pH, or duration, as well as the nature and type of solvent, solvent ratio, type of equipment or stirring, must also be controlled (see Figure 3).
And we mustn't forget raw materials, probably the most important factor and the most difficult to master. Extractors must guarantee constant product quality even though the quality of the plant to be extracted can vary according to weather conditions, cultural practices or geographic origin, even though the plant variety is the same. Simple operations like grinding can considerably modify extraction results and, in particular, extraction specificity.
The extract obtained from solid-liquid extraction as defined below is thus a highly technical product which nonetheless relies on the traditional know-how specific to each industry. Table 4 lists some of the names of traditional extracts by implementation procedure and industry. We can see that an identical extraction process does not always have the same name.
There are also a number of technical and commercial names on the market related to biological properties (diuretic extract), composition (extract titered in polyphenols), solvents used (hydroalcoholic extract), botanical origin (ginkgo extract) or to a combination (hydroalcoholic ginkgo extract, for instance).
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