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Acid vapor sample decomposition in open vessel microwave. Repositório Alice
NOGUEIRA, A. R. de A.; ARAÚJO, G. C. L.; NÓBREGA, J. A..
Micrawave decomposition has been increasingly used hr a large number of samples. A method using an open vessel microwave was used for biological sample preparation with nitric acid vapors under atmospheric pressure. A lab made Teflon@ support suited with four cups, which received the samples, was inserted in the microwave vessel. These cups were used to weight 30 mg of certi5ed re5wence materials such as spinach and apple leaves, which received 150 pL of d.i. water to improve the micrawave e%ciency. This mixture was exposed to acid vapor stemmed from 15 mL of concentrated nitrie acid plsced in the bottom of the vessel hr decompoeition. The maximum microwave temperature, 115'C, was reached in 4 min. This condition was rnaintained hr 20 min to sllow complete...
Tipo: Separatas Palavras-chave: Microvawe; Decompostion; Acid vapor; Open vessel.; Cobalt..
Ano: 2000 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/44768
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