Cathodic stripping voltametry

A method for Pb and other metals in seawater consists of an adsorption step of the complex with 8-hydroxyquinoline (3) followed by differential cathodic stripping voltametry LOD 0.03 nM Pb, after 10 min adsorption74. 

LSCSV linear sweep cathodic strip voltametry... 

Ion in Dilute Solutions by Cathodic Stripping Voltametry. J. Electranal. Chem. 4, 96 (1962). 

Seawater Oxine addition Cathodic stripping voltametry (total uranium) 0.02-0.2 nM No data Van den Berg and Nimmo 1987... 

Gledhill, M. and van den Berg, C.M.G. (1994) Determination of complexation of iron(JII) with natural organic complexing ligands in sea water using cathodic stripping voltametry. Marine Chemistry, 47, 41-54. 

Prepare a stock solution of 0.01 M solution of purest nickel sulphate or chloride. successive dilution, prepare 5 or more solutions in the concentration range of 2 x 10 -10 M. Follow the instructions of the manufacturer of the spectrometer, use an air/acetylene flame with a flow rate of 8.0 dm min and 3.0 dm min for the two gases respectively. Suitable wavelengths are 232.0 nm (major) and 234.6 or 351.5 nm. Very low concentrations of Ni in presence of cobalt have been determined by cathodic stripping voltametry, using standard additions (J.Chem.Educ.74 (1997)1444). 

The conditions for reliable cyclic voltametry determination of trace Sn concentrations in sea water were investigated. All organotin compounds should be converted to Sn(II) by UV-photolysis adsorption on mercury drop in the presence of 40 pM of tropolone (1) cyclic voltametry stripping shows two cathodic peaks, corresponding to the two-step process Sn(IV) — Sn(II) -> Sn(0)29. A complex of Sn ions with catechol can be accumulated in a glassy carbon mercury film electrode, followed by stripping voltametry measurement in the cathodic direction, at pH 4.2-4.7. Interference occurs when Cu, Cd and Cr are present LOD 0.5 pg/L for 300 s accumulation30. 

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