"Indirect Determination Of Iodine In Seawater And Brine By Atmospheric-pressure Helium Microwave Induced Plasma Atomic Emission-spectrometry Using Continuous-flow Cold Vapor Generation Of Mercury"
Microchem. J.
1990 Volume 41, Issue 2 Pages 148-155
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Taketoshi Nakahara* and Tamotsu Wasa
Abstract:
The method was based on the decrease of the Hg emission intensity in highly acidic solution due to the formation of Hg(II) - iodide complexes. The reductant, 0.02% SnCl2 in 0.1 M HCl and Hg(II) in 4 M HNO3 (10 ng mL-1) were added to the sample solution containing I- and the decrease in the Hg signal at 253.652 nm was measured. In the analysis of seawater and brine, IO3- was reduced to I- with 0.001% ascorbic acid. The response was rectilinear from 2 to 100 ng mL-1; limit of detection was 0.74 ng mL-1. The coefficient of variation (n = 100) for 50 ng mL-1 was 1.05%. Mean recoveries were >93%.
Iodine
Sea
Environmental
Detection limit
Indirect
Volatile generation
Volatile generation
