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Fracionamento de polifosfato de sódio e caracterização por RMN de 31P: um exper...
Lima,Emília Celma de Oliveira; Alcantara,Glaucia Braz; Damasceno,Fernando Cruvinel; Moita Neto,José Machado; Galembeck,FernandoThis text describes an experiment on fractional precipitation of a polymer together with determination of average degree of polymerization by NMR. Commercial sodium polyphosphate was fractionated by precipitation from aqueous solution by adding increasing amounts of acetone. The polydisperse salt and nine fractions obtained from it were analyzed by 31P Nuclear Magnetic Resonance and the degree of polymerization...
Data: 2010
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Origem: Oasisbr