Flame atomic absorption determination of lead through on-line preconcentration by surfactant mediated glass wool retention

 
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2006 (EN)
Flame atomic absorption determination of lead through on-line preconcentration by surfactant mediated glass wool retention (EN)

Katsaounos, C. Z. (EN)

Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας (EL)
Katsaounos, C. Z. (EN)

This work reports on the fabrication of a mini column packed with controlled pore glass and glass wool, and its application for the on-line preconcentration of lead with the aid of an anionic surfactant ( sodium dodecyl sulphate, SDS) and AAS detection. Lead reacts with SDS in a highionic-strength environment, and the product is retained and preconcentrated on a high-surface area substrate like glass wool. The intervention of controlled pore glass increases the active surface of glasswool and prevents its accumulation into a sticky mass after wetting. Washing the mini column with a methanolic solution of HNO3, causes the retained micellar face to be eluted, and consequently the lead content can be determined with AAS. A preconcentration factor of 50 along with a signal enhancement due to the combined presence of SDS and methanol yields a detection limit of 1.5 mu g L-1. The correlation coefficient of the calibration curve is 0.999, and the linear range 5-500 mu g L-1. The method was used for the determination of lead in water and wastewater with good results. (EN)

controlled pore glass-glass-wool-packed minicolumn (EN)

Πανεπιστήμιο Ιωαννίνων (EL)
University of Ioannina (EN)

International Journal of Environmental Analytical Chemistry (EN)

English

2006

<Go to ISI>://000234969700006



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