The mechanism of the atomization of boron and the enhancement of sensitivity by matrix modifier Sr(NO₃)₂ in graphite furnace AAS were discussed. X-ray diffraction and thermodynamic calculation were applied to study the mechanism of boron atomization with and without matrix modifier Sr(NO₃)₂. The formation of boron atom is due to the sublimation of solid boron which derived from the reduction of B₂O₃ by carbon. The enhancement of boron signal in the presence of Sr(NO₃)₂ is due to the formation of SrB₆ before atomization, which decreased the volatization losses of B₂O₃ and retarded the formation of B₄C.

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Volume7, Issue5

October 1989

Pages 437-442

Mechanism of boron atomization in graphite furnace atomic absorption spectroscopy

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Mechanism of boron atomization in graphite furnace atomic absorption spectroscopy

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