Analytical applications of triethylenetetraminehexa-acetic acid

Square-wave anodic stripping analysis in the presence of dissolved oxygen

“…This extends the detection limit for these compounds to 2.5 X 10~n M (using 30-min preconcentration). Florence (6) described the use of cathodic stripping voltammetry for the measurement of riboflavin at the mercury pool electrode, reporting a detection limit of 1 X 8 M. The interest in adsorptive stripping voltammetry which can provide very sensitive determinations of compounds with surface-active properties has been growing recently (7). It is evident that this method can be used in trace analysis of organic compounds in a broad range of applications.…”

“…1953, 25, 1078. (7) Feely, F. R.; Kowalczyk, S. P.; Ley, L.; Cuvell, R.; Pollark, R. A.; Shirley, D. A. Phys. Rev.…”

“…A preferable approach, in the interest of simplicity, would be to eliminate altogether the purging process. The possibility of avoiding the removal of oxygen has been demonstrated by using current-sampled dc, pulse, and ac polarography (6), complexometric titration with fixed potential square-wave polarographic detection of the end point (7,8), differential pulse anodic stripping voltammetry (9), and subtractive anodic stripping voltammetry (10). In each case, the presence of oxygen raises the detection limit of the technique as a result of the high uncertainties in the background current due to fluctuations in the concentration of dissolved oxygen.…”