Abstract

Methodology is presented for the normalization of integrated absorbance signals (absorbance·time) to time-independent absorbance values in analytical flow systems. This measure, absorbance·cm 2, represents the absorbance if all the analyte atoms were present simultaneously in the vapor phase in a normalized optical analysis volume. The measure, for which the name “normalized absorbance” is suggested, is one which is totally independent of optical analysis cell dimensions and carrier gas flow rates. Application of this method to cold-vapor mercury atomic absorption (CVMAA) is reported.

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