Butter, purification

Methanol-water is the extraction medium of the method recently tested for validation by the European Commission (39), for the determination of aflatoxins at the European regulatory limits for dried figs, pistachios, peanut butter, and paprika 50 g of the test portion are extracted with methanol-water (80 20) for dried figs and paprika, and methanol-water (80 20) plus 100 ml of hexane for peanut butter and pistachio. After filtration, the filtrate is added to phosphate buffer saline (PBS) for the purification step. 

Armarego WLF, Chai CLL (2003) Purification of laboratory chemicals, 5th ed. (Butter-worth-Heinemann)... 

Orris rhizomes of both Italian and Moroccan origins are hydrodistilled in water (P) to provide an essential oil. Orris essential oils, which are solid at room temperature, are frequently misnamed concretes. They also go by the name of orris butter, which is explained by their butter-like texture. A subsequent purification step by alcohol extraction into an absolute eliminates the fatty acids from the essential oil (butter, concrete). 

Helium turbine with gas seals, oil seals, bearings, cooling systems, insulation Helium compressor with gas seals, oil seals, bearings Helium/helium heat exchangers/recuperators, coolers Hot gas ducts with valves, butter fly valves, bellows, bends Helium purification Coatings in helium atmosphere... 

Purification of Laboratory Chemicals, 5th ed., Armarego, W. L. F. et al. Butter-worth- Heinemann, Amsterdam, 2003. Brief procedures for purifying organic solvents and reagents in the laboratory. 

Pabai, F, Kermasha, S and Morin, A (1995) Lipase from Pseudomonas fragi CRDA 323 partial purification, characterization and interesterification of butter fat. Appl. Microbiol. Biotechnol., 43,42-51. 

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