Based on titanium dioxide nanotubes (TDNTs) as a solid phase extraction adsorbent, a microcolumn preconcentration method coupled with inductively coupled plasma mass spectrometry was developed for the determination of trace gold and silver in environmental and biological samples. The effect of various experimental parameters such as pH, sample flow rate and volume, elution solution and interfering ions on the retention of the analytes was investigated systematically. The experimental results showed that the analytes were retained on TDNTs in th...
