Centrifugation: an efficient technique for preconcentration in anodic stripping voltammetric analysis of mercury using a gold film electrode
Makaleler > Tam Makale · 2009
Yazarlar: Ipek Urkmez, Hatice İsmet GÖKÇEL, Fatma Nil ERTAŞ, Hueseyin Tural
MICROCHIMICA ACTA, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 2009, cilt 167, ss 225-230
DOI: 10.1007/s00604-009-0246-z
Özet
The effect of centrifugation on the voltammetric behavior of mercury on a gold film electrode was investigated. Mercuric ion was reduced with borohydride to form metallic mercury droplets which were collected on a gold film electrode with the aid of centrifugal force without a carrier material. A special cell was constructed for this purpose. The effect of the amounts of reducing agent, stripping solution, time and speed of centrifugation on the anodic stripping peaks resulting from the re-oxidation of mercury were investigated. The calibration graph for mercury(II) has a regression coefficient of 0.9941; its linear range is from 3.0 pM to 10.0 nM. Due to the effect of accumulation, the detection limit of mercury(II) is as low as 3 pM.