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Determination of Bromine Using High-Resolution Continuum
Source Molecular Absorption Spectrometry in a Graphite
Furnace
Authors: Tobias Limburg, Jürgen W. Einax
This article was published in: Microchemical Journal, 2012
Abstract
“An analytical method is described for the quantitative analysis of bromine in water
solutions as well as in organic solvents using high-resolution continuum source molecular
absorption spectrometry (HR-CS-MAS) in a graphite furnace. Bromine is determined by
means of molecular absorption of calcium bromide at 625.315 nm. First of all the timetemperature program is optimized and the measurements are accomplished with graphite
tubes without integrated PIN platform modified with permanent zirconium modifier and with
a Pd/Mg-Modifier. The linear range is extended up to six orders of magnitude (from pg to
μg-range, absolute) and a limit of detection of 78 pg Br absolute is achieved. The accuracy
of the method is verified by the recovery rate of two inorganic and one organic salt, and
the determination of a whirlpool disinfectant agent as matrix burdened sample. Also,
spectral and non-spectral interferences are investigated, whereby only in the case of
concentrations in the higher mg L− 1-range, non-spectral interferences are observed for
fluorine, chlorine, iodine, aluminum, and iron. Next to determination of bromine in water
solutions, analysis of polybrominated flame retardants (BFRs) is presented. BFRs are
under suspicion of having partial toxic and neurotoxic effects. That is why an easy-tohandle method for the determination of bromine to calculate afterwards the BFR contents
by means of the bromine mass fraction is of current interest. After adaptation of the
heating program to organic solvents, bromine in three BFRs is determined quantitatively.
So, the determination of bromine via HR-CS-MAS is suited for the analysis of low-matrix
burdened samples and also in organic compounds. Anymore, this method is a fast, easyto-handle technique with a low limit of detection.”*
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* Microchemical Journal, 2012
Determination of Bromine Using High-Resolution Continuum Source Molecular Absorption Spectrometry in a Graphite
Furnace
Reference: Lit_AA_11_12_e
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