 Wysłany: Wto 11:59, 08 Mar 2011 Temat postu: Herbicide with contact dermatitis in 1 case _3692 |
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| Herbicide with contact dermatitis in 1 case
Combined with milk of lime salt (mainly ca At the same time, most of the ineffective ingredients such as tannin, part of the protein, acidic carbohydrates, polar pigments, acidic resin can also be combined with the milk of lime into the salt precipitation reaction. part of the alkaloid can be free of salt in milk of lime precipitation. and lime precipitation most effective combination of ingredients can be part of the solvent such as ethanol, benzene, gasoline, dissolved, or in aqueous solution under the action of sulfuric acid (PH4-6), glycosides, anthracene glycosides and the ca Chelation generated ring, phenolic compounds and ca amount of sulfuric acid, the active ingredients to re-dissolve, ca_ ¨ With the formation of calcium sulfate precipitation, filtration, collecting the filtrate (including the plant active ingredient). filtrate refined by appropriate methods, drying, crystallization, pure and effective ingredients available. Based on the above principle, can be used for most of the milk of lime containing glycosides, anthraquinone glycosides, some alkaloids, saponins extracted active ingredients of plants. If from the honeysuckle, dandelion, skullcap, arrowroot,UGG boots Italia, and other plants mentioned glycosides Maodongqing , anthracene glycosides; from tonkinensis, three pins, cork, celandine, Sophora alkaloid extracted; and from the mountains dragon, dragon tongue leaf sapogenin extract Yaro, etc.,keen shoes sale, can be used lime method, which enables effective Ingredients precipitation. specific practice: the herbal decoction (immersion or percolation) in the hot concentrated solution of 20 ~ 30% addition of lime, f temperature of about 80% is appropriate), and stir so that complete reaction , cooling, put it aside overnight. Most of the active ingredient and impurities can be precipitated with lime reaction. leach precipitation, according to the nature of the active ingredient contained in, select the appropriate solvent. commonly used solvents are water, ethanol, benzene, ethyl ether , gasoline and so on. in the production practice, we use gas instead of benzene, ethyl ether also received the same results, the choice of solvent is generally: precipitation containing glycosides, anthracene glycosides ingredients dissolved by ethanol, containing alkaloids or the use of water alcohol, with Yaro sapogenin select benzene, ethyl ether, petroleum ether or gasoline. dissolved precipitate, the general need to add sulfuric acid decalcification, the calcium chelating ring rupture, the active ingredient dissolved in solvent transfer. In the case of ethanol and water as a solvent, the active ingredient released at the same time, some under the action of tannins in the sulfuric acid can also be re-dissolved, in order to minimize divisible tannins,mbt scarpe outlet, isolated the active ingredient, the liquid can be handled by the acid. We took in the actual work the following practices: in the ethanol solution containing the active ingredient plus 40% sodium hydroxide solution adjusted PH7.5-8, tannin is combined with sodium hydroxide into the sodium salt (do not dissolve in mellow) and precipitation sedimentation, filtration and discard . But in the extraction of glycosides, the glycosides under alkaline conditions, but also with the formation of sodium hydroxide, in order to prevent loss of active ingredient, PH value should not be over 8.O above. also can be organic solvent washing, re- crystallization treatment, to collect the pure active ingredient. and then proceed to the preparation of injections, so as to ensure injection of the content and quality. injection of preparation of Extract taken slowly dissolved in a small amount of alkaline solution (PH7, 5), to be dissolved additional amount of distilled water (each 15 mg extract ml), filtration, transfer PH6.5, osmotic adjustment, with the G3, melt down the glass filtered funnel, packaging, sterilization, inspection and approval, can be used. the usual dose Adult 3O mg / time, 60 mg / day, intramuscular injection. 2 precipitate impurities, to improve clarity in the preparation of Chinese herbal injection, the extraction of plant active ingredients with the milk of lime precipitation method,ugg stiefel, still use alcohol, benzene, gasoline and other organic solvents washing, separation. grassroots sometimes can not be fully achieved, and the active ingredient in some Chinese herbal medicine is not clear, but not purification, crystallization. we can based on lime and liquid large proportion of the impurities with precipitation, while the combination of active ingredients and milk of lime into a calcium chelating compound, calcium, or were free, under the action of sulfuric acid (PH4 ~ 6) the principle of re-dissolved in the preparation of Chinese herbal injection method used in the milk of lime precipitation of impurities, such as tannins, part of the protein, organic acids, polar pigments, polysaccharides, acidic resin can be precipitated, to improve clarity and fluid, received a certain effect. In practice, we take the following specific practices: 2.1 add concentrated liquid herbal decoction Lime precipitation of impurities common practice is concentrated in the drug solution (usually liquid extract form) by adding 20 to 30% hot milk of lime tune PH: above; full mixing, cooling, put it aside,ghd piastre, that is, precipitation formation (including impurities and part of the active ingredient). plus 2O ~ 50% sulfuric acid solution, decalcified (PH5 ~ 6), mixing, so that reaction is complete, it |
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