The determination of iodine species in environmental and biological samples (Technical Report)

Abstract

Republication or reproduction of this report or its storage and/or dissemination by electronic means is The determination of iodine species in environmental and biological samples (Technical Report)Abstract: Iodine is found in organic forms in plants and animals and in inorganic forms in natural water samples. Methods of identification and quantitative determination for iodine species are decided by the types of compound and the matrices in which they occur. Iodine is an essential element and specific radioimmunoassay methods have been devised for physiologically important compounds (thyroxine and related compounds) in which it is found. In addition, marine plants and animals have provided a rich source of varied and unexpected organic iodine compounds that occur, along with other organic halogen compounds, as secondary metabolites. Natural waters, particularly marine waters contain iodine chiefly in the forms of iodide and iodate. Organic iodine compounds in biological samples have been identified by classical natural products chemical techniques following their isolation, and by modem spectroscopic methods. Routine analysis of such compounds can be done by gas chromatography (GC) and high performance liquid chromatography (HPLC). Analysis of inorganic iodine species in waters is carried out by catalytic, electrochemical and spectrometric methods and by GC; possibly HPLC inductively coupled-mass spectrometry (ICP-MS) might be the method of choice in the future.

A review on speciation of iodine-129 in the environmental and biological samples

“…The concentration of 129 I in the environmental samples is normally 4-12 orders of magnitude lower than that of stable iodine, for this reason the analytical methods, including the species separation and analytical techniques for the stable iodine ( 127 I) can not be directly used for 129 I. The speciation of stable 127 I has been widely investigated in the environmental and biological samples; a few review articles related to the speciation of stable iodine are available [1,[24][25][26][27][28][29][30]. However, the investigation of 129 I speciation in the environmental, especially biological samples is still very limited.…”

Microfluidic Analysis with Front-Face Fluorometric Detection for the Determination of Total Inorganic Iodine in Drinking Water

“…As iodate ion is also present in drinking water samples [29][30][31] reduction of iodate to iodide is required prior to its determination by the Sandell-Kolthoff reaction. A solution of As(III) can be employed as the reducing agent.…”

An ESIPT based fluorescent probe for highly selective and ratiometric detection of periodate

“…Then the type and concentration of hydrolases could be recorded by fluorescence intensity changes of umbelliferone. Besides its special effect on organic and bioorganic chemistry, periodate is also related to food and environmental safety because of the conversion of periodate to some other iodine species that were considered as potentially hazardous contaminant (Hariri et al, 2013;Edmonds and Morita, 1998;von Gunten, 2003). Finally, some iodine species is also essential component for biomolecule such as thyroid hormones.…”