Zeeman atomic absorption spectrometry using high frequency modulated light polarization

摘要

This paper reports the novel use of Zeeman atomic absorption spectrometry using high frequency modulated light polarization (ZAAS-HFM), its theoretical basis and experimental validation. Due to the high frequency modulation of the analytical and reference signals, the temporal background correction enor is reduced below 10~(--5) absorbance units. In addition, the use of ZAAS-HFM enables the operator to increase the apparatus transmittance and therefore to reduce the detection limrts and to broaden the dynamic range of the analytical curves.