Organic solvents or mixtures

Organic solvents or mixtures of water and solvents such as acetone or water-acetone are commonly used to extract chemicals from sediment samples as for upland soil. An analysis of sediment, collected from waterways or extremely low Eh paddies, frequently requires the removal of sulfur-containing species, although there is little interference from sulfur if the sediments are in a not very reductive condition. Reduced copper and silver nitrate columns are usually used for the removal, but these procedures are not always successful. Recovery studies could be needed to confirm an interference with sulfur. 

Direct emulsification A solution of the polymer within a volatile, water-immiscible organic solvent (or mixture of solvents), or a polymer melt is emulsified within a surfactant-containing aqueous phase. If used, the organic solvent is then removed by steam distillation to obtain the pseudolatices. 

The reaction may proceed in water, acetic acid, or any other organic solvent or mixture that is inert to diketene. This group also includes bifunctional coupling components of the bisacetoacetic diaminodiphenyl type ... 

The common application form of silver sulfadiazine is a 1% w/w oil-water cream. Prior to the identification and determination of silver sulfadiazine the cream basis can be removed by dissolution into a suitable organic solvent (or mixture of solvents). The following extraction media are described ... 

It is not proposed to deal with the theory of paper chromatography here, but it may be pointed out that an important factor is the distribution of the inorganic compound between an organic solvent and water. One way in which the distribution may be varied is by forming complexes of the cations with different organic solvents or mixtures of solvents. 

Viibsh with organic solvent or mixture of organic solvent withwaterfbuffer. 

Simulated moving bed (SMB) processes are related to the separation of chemical products. Efficient purification techniques are crucial in chemical process industries. Liquid chromatographic separation has been widely used for products with an extremely high boiling point, or thermally unstable products such as proteins. In liquid chromatographic processes, a small amount of feed mixture is supplied to an end of a column which is packed with adsorbent particles, and then pushed to the other end with desorbent (water, organic solvent, or mixture of these). 

Conditioning or activating the solid sorbent with organic solvents or mixture of organic solvents and reagent water to effectively extract organic analytes from the aqueous sample... 

The vehicle is commonly water but can be any suitably volatile organic solvent or mixture of solvents. When working with organic solvents, precautions must be taken to vent vapors safely with respect to explosive concentration limits and within allowable/permitted evaporation qnantity limits. 

Solvent extraction has long been used for the isolation of essential oils from natural products. This technique uses either pure organic solvents or mixtures, Organie solvent extraction assisted by ultrasound, also known as sonieation, is another teehnique widely used for the isolation of essential oils/extracts from plants. Thus, sonieation methods based on 20-30 minutes of extraction with methanol-chloroform mixtures have been used for the isolation of white elove essential oil [37] and eyanogenie glueosides [38],... 

Products containing keratin, vitamins, essential oils, botanical extracts are usually employed for nail care. Ingredients which were used previously, such as formaldehyde or toluene are being replaced by other organic solvents or mixtures (e.g. ethyl acetate, butyl acetate, acetone, ethanol) that are also able to dissolve lacquers. 

Carrier for the reactions is water, organic solvents or mixtures of both. Working up of reaction products is carried out on typical equipment, such as... 

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