Determination of Lead in Ice by Stripping Potentiometry



In order to determine the amounts of lead in ice by stripping potentiometry, the 400 ml matrix modifying solution was added to an ice sample of total volume 30 ml in an electrochemical cell. The modified solution was 800.00 mg/l Hg(II) in 1.30 M hydrochloric acid. The working electrode was a glassy carbon disc, with Ag/AgCl as a reference electrode, and a platinum rod as a counter electrode. Stripping potentiometry was used on sample solutions and standard solutions which were electrolyzed for 3 min at −1.00 V. The peak potentials were set around −0.38 to −0.42 V. The concentrations of lead (II) standards were 0.10, 0.40, 0.70 and 1.00 mg/l. The calibration plot between peak areas and concentration of lead (II) standards was obtained with a correlation coefficient of 0.9969. A detection limit of 0.023 mg/l or 23.00 ng/l(3SD) was shown with a precision of 5.50 % RSD for a 2.0 mg/l standard (n = 5). The percentage recovery was found to be 95.50 %. The concentration range of lead (II) in ice samples was determined to be 0.09 to 0.53 mg/l.


Lead, ice, stripping potentiometry, mercury film

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W Chisholm, KJL Rosman, CF Boutron, JP Candelone and S Hong. Determination of lead isotopic ratios in Greenland and Antarctic snow and ice at picogram per gram concentrations. Anal. Chim. Acta 1995; 311, 141-51.

CF Boutron, MA Bolshov, VG Koloshnikov, CC Patterson and NI Barkov. Direct determination of lead in vostok Antarctic ancient ice by laser excited atomic fluorescence spectrometry. Atmos. Environ. A-Gen. 1990; 24, 1797-800.

T Doring, M Schwikowski and HW Gaggeler. Determination of lead concentrations and isotope ratios in recent snow sample from high alpine sites with a double focusing ICP-MS. Fresen. J. Anal. Chem. 1997; 359, 382-4.

RD Riso, PL Corre and CJ Chaumery. Rapid and simultaneous analysis of trace metals (Cu, Pb and Cd) in seawater by potentiometric stripping analysis. Anal. Chim. Acta 1997; 351, 83-9.

S Laschi, I Palchetti and M Mascini. Gold-based screen-printed sensor for detection of trace lead. Sensor. Actuat. B-Chem. 2006; 14, 460-5.

FL Coco, P Monotti, F Cozzi and G Adami. Determination of cadmium and lead in fruit juices by stripping chronopotentiometry and comparison of two sample pretreatment procedures. Food Control 2006; 17, 966-70.


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Last updated: 20 June 2019