Histidine functionalized multi-walled carbon nanotubes as sorbent for flow injection-electrothermal atomic absorption spectrometric ultrasensitive determination of trace vanadium (V) in biological and environmental samples

► MWCNTs-His have been employed as sorbents for detection of trace V(V). ► MWCNTs-His was proved to be good column packings after preconcentration of V(V) statically and dynamically evaluated. ► The detection limit (3 s) of developed method achieved 9 ng L−1 or 0.2 nM. ► The developed method was applied to determination of trace V(V) in a variety of biological and environmental samples.