INVESTIGATIONS ON THE DETERMINATION OF CHLORIDE AND BROMIDE BY FURNACE ATOMIC NONTHERMAL EXCITATION SPECTROMETRY AND FURNACE IONIC NONTHERMAL EXCITATION SPECTROMETRY

The determination of chloride and bromide by non-thermal excitation spectrometry in a graphite furnace using both atomic and ionic spectral lines was investigated. The most sensitive determinations could be made at the ionic lines Cl II 479.545 nm and Br II 470.486 nm. The addition of an ionization buffer provided constant plasma conditions resulting in improved linearity of the calibration function. Under optimum conditions and in the presence of appropriate buffers detection limits of 0.6 ng for chloride and 2 ng for bromide were obtained.