In the cultivation process, Chinese herbal medicines are often endangered by a variety of diseases and diseases, which directly affect the yield and quality of Chinese herbal medicines, causing major economic losses. The State Administration of Traditional Chinese Medicine organized relevant units to conduct research on the plant protection of Chinese herbal medicines. The survey results suggest that the control of medicinal plant pests and diseases is the weakest link in the production of Chinese herbal medicines.
In the cultivation process, Chinese herbal medicines are often endangered by a variety of diseases and diseases, which directly affect the yield and quality of Chinese herbal medicines, causing major economic losses. The State Administration of Traditional Chinese Medicine organized relevant units to conduct research on the plant protection of Chinese herbal medicines. The survey results suggest that the control of medicinal plant pests and diseases is the weakest link in the production of Chinese herbal medicines. There are many types of pests and diseases, heavy damages and large losses. Because pesticide farmers lack common knowledge about pesticides, the problem of abuse and misuse of pesticides is prominent. The problem of pesticide residues in Chinese herbal medicines directly affects human health and hinders the entry of Chinese medicine into the international market. For this 2015 edition of the Chinese Pharmacopoeia, the "Pesticide Residues" inspection project under the ginseng, American ginseng medicinal materials and their decoction pieces, the limit is "including total 666 (α-BHC, β-BHC, γ-BHC, δ-BHC) And the) must not exceed 0.2mg / kg; total DDT (pp'-DDE, pp'-DDD, op'-DDT, pp'-DDT sum) shall not exceed 0.2mg / kg; pentachloronitrobenzene shall not exceed 0.1 Mg/kg; hexachlorobenzene should not exceed 0.1mg/kg; heptachlor (heptachloro, epoxy heptachlor) should not exceed 0.05mg/kg; aldrin should not exceed 0.05mg/kg; chlordane (cis chloride) Dan, trans chlordane, and chlordane oxide should not exceed 0.1 mg/kg.". This program is fully integrated with the latest national standards, comprehensively combined with the 2015 edition of the Pharmacopoeia of the People's Republic of China, based on the GMP guidelines for drugs (2010 edition), applicable to the quality control and ** supervision departments of organochlorine pesticide residues in various Chinese herbal medicines. Daily testing.
Method introduction:
After homogenization, the mixture was extracted with water and acetonitrile and then salted out using two layers; the acetonitrile phase was concentrated and reconstituted with cyclohexane-ethyl acetate (1:1) solution, and purified by acetonitrile gel chromatography. After purification by silica column, the purified sample was concentrated under reduced pressure and then reconstituted with isooctane for GC-ECD analysis.
2015 New Pharmacopoeia on the preparation of 22 organochlorine pesticide residues samples:
Accurately measure the homogenized sample 1.5G in a 50ml centrifuge tube, add 10ml water to soak for 2 hours; precisely add 15ml of acetonitrile, shake vigorously for one minute; add salting out package (4g sewage magnesium sulfate + 1g sodium chloride), intense Shake for one minute; centrifuge at 4000 rpm for 1 minute, accurately transfer 10 ml of acetonitrile phase, concentrate to near dryness under reduced pressure at 40 ° C; transfer 10 ml of ethyl acetate-cyclohexane (1; 1) solution to a 10 ml volumetric flask. Capacitance to 10ml; take 5ml of supernatant to purify by gel chromatography, special column Bio-beads SX-3 400*25mm; collect 18-30mins of purification solution, concentrate at 40°C to near dryness, add 1ml of n-hexane to reconstitute Purified with Florisil silica column (Florisil PR 1000mg/6ml); the purified sample was concentrated to near dryness with a nitrogen blower, and 1 ml of isooctane vortex was added for GC-ECD analysis.
2015 New Pharmacopoeia Instruments for the determination of 22 organochlorine pesticide residues:
Gel Permeation Chromatograph GPC-S60
Gel Permeation Chromatography Column 400mm*25mm
GD-17 quartz capillary column 30m*0.25mm*0.25um
Chinese herbal medicine pesticide residue detection equipment and special consumables to click to enjoy the surprise price! For more testing solutions and instrument consultation, please call the sales hotline 400-1158-566.
Guoda Instrument Co., Ltd. is a high-tech enterprise specializing in R&D, production, sales and service of chromatography products and laboratory equipment. Sales and customer service outlets throughout the country have developed into an integrated supplier of instrumentation and chromatography consumables with a certain influence and scale in the domestic analysis industry. Chromatographic products include: chromatographic reagents, liquid chromatography columns, quartz capillary columns, solid phase extraction cartridges, and UV xenon lamps and other special chromatographic accessories and consumables; instrument products include liquid chromatograph, gas chromatograph, atomic absorption spectrometry Photometer, thin layer chromatography, ultraviolet spectrophotometer, electronic balance, biological safety cabinet, purification workbench and various laboratory drying ovens, incubators, biochemical instruments and shakers, etc., widely used in pharmaceutical, medical , pesticides, food and chemical industry, agricultural environmental protection, health and epidemic prevention, universities, scientific research and other units. The company adheres to the road of science and technology and has a strong professional service team. It is a strategic partner of many well-known brands in China. The company attaches great importance to scientific management, adhering to the "brand, quality, professional, honest" cultural philosophy, and strives for the cooperation and recognition of thousands of households with the product quality of excellence and the long-term service of professional integrity. We adhere to the implementation of the international quality assurance system to ensure that users have no worries, more product clicks; company mailbox: [email protected]
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Construction iron horses are also called iron horses, construction iron fences, construction fences, municipal iron horses, etc., and their heights are basically 1.0 and 1.2 meters. It is mainly used to isolate roads and buildings from the crowd during construction.
We often see that there is nothing in the middle of some urban roads, and some vehicles will turn around and turn at will, posing a great threat to traffic safety. Since the appearance of the municipal iron horse guardrail, it has been very good to prevent this from happening. At the same time, for the municipal department, it can make the work very simple.
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