Abstract

Determination of low concentrations of iodine is of great importance in environmental and geochemical analyses. Therefore, the analytical techniques for the determination of iodine in environmental and geochemical samples need to be sensitive. Among the many possible methods, at present, neutron activation analysis is probably the most sensitive technique. On the other hand, in general, although atomic spectrometric techniques are excellent methods for metal determinations, the determination of nonmetals such as iodine by atomic emission spectrometry (AES) as well as atomic absorption spectrometry (AAS) has been quite limited. However, analytical plasmas such as the inductively coupled plasma (ICP) and microwave-induced plasma (MIP) do show promise in the area of nonmetal determinations. The microwave-induced plasma, in particular, has received considerable attention as an excitation source for atomic emission spectrometry. Very recently, the present authors have described the continuous-flow determination of trace iodine by atmospheric-pressure helium MIP-AES using generation of volatile iodine from iodide and reported good detection limits of 2.3 and 3.2 ng/mL for iodine at 183.04 and 206.16 nm, respectively, with linear dynamic ranges of approximately four orders of magnitude in concentration. Of various oxidation reactions examined, an oxidizing solution of 1.0 m<b>M</b> sodium nitrite in 5.0 <b>M</b> sulfuric acid is the most favorable for the generation of elemental iodine from iodide. The aim of this communication is to report the application of atmospheric-pressure helium MIP-AES combined with continuous-flow gas-phase sample introduction to the determination of low concentrations of total iodine (i.e., iodide plus iodate) in brines and coastal seawaters.

Practical and highly sensitive elemental analysis for aqueous samples containing metal impurities employing electrodeposition on indium-tin oxide film samples and laser-induced shock wave plasma in low-pressure helium gas

Koo Hendrik Kurniawan, Marincan Pardede, Rinda Hedwig, Syahrun Nur Abdulmadjid, Kurnia Lahna, Nasrullah Idris, Eric Jobiliong, Hery Suyanto, Maria Margaretha Suliyanti, May On Tjia, Tjung Jie Lie, Zener Sukra Lie, Davy Putra Kurniawan, and Kiichiro Kagawa
Appl. Opt. 54(25) 7592-7597 (2015)

Microwave-enhanced laser-induced air plasma at atmospheric pressure

Yuji Ikeda and Joey Kim Soriano
Opt. Express 30(19) 33756-33766 (2022)

Experimental study on an all gas-phase iodine laser using microwave discharge of Cl₂/He as a Cl atoms source

Shukai Tang, Liping Duo, Yuqi Jin, Haijun Yu, Jian Wang, and Fengting Sang
Appl. Opt. 45(27) 7126-7130 (2006)

Laser-induced breakdown spectrometry as a multimetal continuous-emission monitor

Hansheng Zhang, Fang-Yu Yueh, and Jagdish P. Singh
Appl. Opt. 38(9) 1459-1466 (1999)

Enhancement of the 2062-Å Atomic-Iodine Line in an Iodine Inert-Gas Flashlamp

Algird G. Leiga and John A. McInally
J. Opt. Soc. Am. 57(3) 317-322 (1967)