Direct determination of iodide in sea water by cathodic stripping square wave voltammetry

Journal Article · Thu Sep 01 00:00:00 EDT 1988 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00168a017· OSTI ID:6743300

Luther, III, G W; Swartz, C B; Ullman, W J

A procedure for the direct determination of iodide in sea water is described. By use of cathodic stripping square wave voltammetry, it is possible to determine low and subnanomolar levels of iodide in sea water, freshwater, and brackish water. Precision is typically +/-5% (1sigma). The minimum detection limit is 0.1-0.2 nM (12 parts per trillion) at a 180-s deposition time. Data obtained on Atlantic Ocean samples show similar trends to previously reported iodine speciation data. This method is more sensitive than previous methods by 1-2 orders of magnitude. Triton X-100 added to the sample enhances the mercury electrode's sensitivity to iodide.

• Research Organization: Univ. of Delaware, Lewes (USA)
• OSTI ID: 6743300
• Journal Information: Anal. Chem.; (United States), Vol. 60:17
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
IODIDES
VOLTAMETRY
SEAWATER
QUANTITATIVE CHEMICAL ANALYSIS
CATHODES
EXPERIMENTAL DATA
TRACE AMOUNTS
CHEMICAL ANALYSIS
DATA
ELECTRODES
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INFORMATION
IODINE COMPOUNDS
NUMERICAL DATA
OXYGEN COMPOUNDS
WATER
400102* - Chemical & Spectral Procedures
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)