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.
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.
Analyze project
Crude protein, crude fat, ash, water, carbohydrate, PH value;
Acid washing fiber, neutral washing fiber, dietary fiber, pectin, cellulose, hemicellulose, lignin, starch;
Trace elements, ammonium nitrogen, nitrate nitrogen, available phosphorus, available potassium, biogenic amines, alkaloids, tannins;
Vitamins A, B, C, D, E, etc.
Test items
Primary metabolite
Fatty acid analysis: The current methods for the determination of fatty acids include infrared absorption spectroscopy, capillary electrophoresis, gas chromatography, anion chromatography, Elisa and GC.
Amino acid analysis: There are three common methods for the determination of amino acids: high performance liquid chromatography (HPLC), amino acid analyzer and liquid-mass spectrometry (LC-MS /MS).
Trace element analysis: At present, relatively mature and stable trace element analysis methods are mostly ICP-MS and ICP-OES.
The saccharide analysis project includes: The composition analysis of monosaccharides in polysaccharides, the molecular weight distribution of polysaccharides, glucose, total sugar, reducing sugar, fructose, galactose, lactose, maltose, sucrose, ribose, mannose, rhamnose, xylose, starch, etc.
Secondary metabolite
Plant endogenous hormones, phenolic acids and organic acids, analysis of flavonoids, analysis of alkaloids, analysis of volatile oils (essential oils), analysis of flavor substances, etc.
Plant endogenous hormones: HPLC or HPLC-MS is the common method for the determination of plant hormones. The price of HPLC method is low, but there is a determination of detection limit. However, how low the content of plant endogenous hormones is, it is not easy to be detected.
Analysis of volatile oil (essential oil) : At present, the extraction methods of volatile oil are generally steam distillation, supercritical CO2 extraction, microwaves assisted extraction, etc. For qualitative analysis of volatile oil, GC-MS is generally used for qualitative analysis, while the peak area method is relatively quantitative.
Analysis of flavor substances: Modern food flavor chemistry obtains extracts through molecular distillation, supercritical fluid extraction, ultrafiltration, solid-phase microextraction and other methods, and through micro and ultra-micro analysis methods (GC-MS, LC-MS, NMR).
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