Determination of trace level iodine in biological and botanical reference materials by isotope dilution mass spectrometry
- 1 July 1989
- journal article
- Published by National Institute of Standards and Technology (NIST) in Journal of Research of the National Institute of Standards and Technology
- Vol. 94 (4) , 215-220
- https://doi.org/10.6028/jres.094.022
Abstract
A method has been developed for the determination of trace level iodine in biological and botanical materials. The method consists of spiking a sample with I, equilibration of the spike with the natural iodine, wet ashing under carefully controlled conditions, and separation of the iodine by co-precipitation with silver chloride. Measurement of the I/I ratio is accomplished by negative thermal ionization mass spectrometry using LaB for ionization enhancement. The application of the method to the certification of trace iodine in two Standard Reference Materials is described.Keywords
This publication has 1 reference indexed in Scilit:
- Analysis of Foods for Iodine: Interlaboratory StudyJournal of AOAC INTERNATIONAL, 1979