Possibilities for the simultaneous preconcentration and flame atomic absorption spectrometric determination of Cr(III) and Cr(VI) using a C18 column and sorption loop
A. Gaspar et al., Possibilities for the simultaneous preconcentration and flame atomic absorption spectrometric determination of Cr(III) and Cr(VI) using a C18 column and sorption loop, FRESEN J AN, 363(5-6), 1999, pp. 480-483
The sorption loop as a preconcentration unit used so far in the low-pressur
e flow injection (FI) system was combined with the hydraulic high-pressure
nebulizer (HI-IPN) and a high-pressure liquid chromatographic (HPLC) column
. Thus, the sorption preconcentration of CI(VI) can be coupled to a powerfu
l sample introduction method or preconcentration techniques of Cr(III). The
subsequent determination of the Cr(VI) content of the samples was carried
out by flame atomic absorption (FAAS).