Rapid determination of iodine in soils using inductively coupled plasma mass spectrometry.

摘要

This paper provides an improved method for the extraction and determination of iodine in soil samples using tetra methyl ammonium iodide (TMAH) and inductively coupled plasma-mass spectrometry (ICP-MS). The iodine extraction efficiency in soils improved by optimization of reaction conditions and reagents, is described. The measured values are in good agreement with the certified values and RSD is <1%. The concentration of iodine determined in soil standards was significantly close to the certified values. For the geochemical exploration samples and marine sediments, for which certified values are not available, the concentration of iodine has been proposed supported by X-ray fluorescence determination for some selected samples. The method involves a simplified procedure for rapid analyses of iodine concentration in soils and can be reliably applied to a large number of samples, especially in oil-exploration studies.