[Speciation analysis of chromium(VI) and chromium(III) in water sample using flame atomic absorption spectrometry with TOA-benzene extraction separation system].

A rapid and sensitive method for the sequential determination of Cr(VI) and Cr(III) in water samples based on flame atomic absorption spectrometry with TOA-benzene extraction separation system has been developed. In the H2SO4 medium. Cr(VI) in sample solution was extracted into the organic phase by using the TOA-Benzene and Cr(III) remained in the water phase.