Molecular Absorption Spectrometry with Electrothermal Vaporization ETV-MAS

6 7 Molecular Absorption Spectrometry with Electrothermal Vaporization (ETV—MAS) 

The direct determination of non-metals, such as sulfur, phosphorus, and halogens by conventional AAS methods is either impossible or very insensi- 

A1 enhances the absorption signal of Fe. The change in the signal is directly proportional to the A1 concentration. 

Ge-molybdophosphoric acid is extracted first into a mixture of 1-pentanol and diethylether and then extracted back into ammoniacal aqueous solution. The Mo absorption is measured in the aqueous phase. 

Niobium-molybdophosphoric acid is extracted into isobutyl acetate or butanol. 

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Molecular absorption spectrometry with electrothermal vaporization (ETV-MAS). An analytical method for the determination of elements in small quantities. It is based on the absorption of radiation energy by two atomic molecules at elevated temperatures. 

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