Zhongxi is a complete laboratory for analysis and testing, also an audited contract laboratory.We can provide a wide range of chemical analysis and material testing services to a diverse international customer base.Our expertise and years of experience enable us to choose the right analytical methods and generate the accurate data needed to solve your toughest problems.
Overview of plant extracts
Plant extract is a product made from plants, which is extracted and separated physically or chemically to obtain one or more active components without changing the structure of the active components. According to the different components of extracted plants, glycosides, acids, polyphenols, polysaccharides, terpenes, flavonoids and alkaloids were formed. According to different characters, can be divided into vegetable oil, extract, powder, lens and so on. Due to the influence of soil, atmosphere and other factors in planting and the production and processing process, there may be some trace harmful components in the extract.
Plant analysis test samples
Trees, shrubs, vines, grasses, ferns, algae, lichens and other familiar creatures. Seed plants, bryophytes, ferns, gymnosperms and other plants, plant samples mainly include plant stem and leaf tissue, seeds, flowers, vegetables, melon and fruit, grass and other samples.
Detection range
Propolis, anthocyanins, tea polyphenol, ginkgo biloba extract, etc.
Glycosides: semen armeniacae amarum P.E., salicin, cardiac glycosides, saponins, etc.
Flavonoids: soy isoflavones, flavonoids, flavonols, flavanones, flavanols, isoflavanones, etc.
Alkaloids: berberine, ephedrine, rauwolfia, camptothecin, vincristine, etc.
Volatile oils: essential oils.
Polysaccharides: polysaccharides of edible fungi, algal polysaccharide, herbal polysaccharide, etc.
Organic acids: citric acid, lactic acid, tartaric acid, malic acid, ascorbic acid, oxalic acid, caffeic acid, chlorogenic acid, titratable acid, etc.
Service project
Component content: component analysis, qualitative and quantitative, determination of polysaccharide molecular weight, etc.
Heavy metals (trace elements) :mainly refers to mercury, cadmium, lead, chromium and metal arsenic and other toxic elements, etc.
Detection of toxic and harmful substances: environmental toxicants, biological toxins (aflatoxin M1, B1, B2, G1, G2, vomiting toxin, ochratoxin A, t-2 toxin, corn red enzyme enone, microcystin -LR, etc.) plant hormone content, etc.
Microbiological detection: colonies number, coliforms, molds, yeasts, salmonella, staphylococcus aureus, shigella, etc.
Drug residues: pesticide residues, solvent residues (pesticide residues 179,hexachlorocyclohexane, DDT), etc.
Method for the detection of plant extracts
1. High performance liquid chromatography (HPLC) : also known as "high pressure liquid chromatography", "high speed liquid chromatography", "high separation degree liquid chromatography", "modern column chromatography", etc.
2. Ultraviolet spectrophotometer (UV) : UV detection is also known as ultraviolet detection method, ultraviolet spectrum detection method.
3. Thin layer chromatography (TLC) : also known as thin layer chromatography, belongs to solid-liquid adsorption chromatography.
4. Gas chromatography (GC) : chromatography using gas as a moving phase. The stationary phase can be divided into two types according to the different stationary phase used. When the stationary phase is liquid, it is called gas-liquid chromatography.
5. Atomic absorption spectrometry (AAS) : HPLC and UV are commonly used for the detection of standard plant extracts, TLC is used for the detection of proportional extracts, GC is used for the detection of volatile liquids or oils, and AAS is used for the detection of heavy metals in extracts.
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