In this paper, the use of titanium dioxide nanotubes (TDNTs) as solid-phase extraction adsorbent for on-line microcolumn separation and preconcentration of trace metals (Mn, Co, Cr, Zn, and Pb) was investigated by inductively coupled plasma mass spectrometry (ICP-MS). The effects of the experimental parameters, including pH, sample flow rate and volume, elution conditions and interfering ions on the recoveries of the analytes were investigated systematically. The experimental results showed that the analytes were adsorbed quantitatively on TDNTs in the pH range from 7.0 to 9.0 and then eluted ...
