IODINE DETERMINATION IN BIOLOGICAL-MATERIALS BY ICP-MS

The present work describes an analytical procedure for the determinati on of the total iodine content in biological materials (serum, milk, p lants, tissues etc.). Liquid samples can be directly analyzed after di lution, if necessary, by ICP-MS. Milk powder, plants and tissues were dissolved by using a modified simple Schoninger combustion, subsequent ly the residue was taken up in 0.1 moll NaOH and this solution was ana lyzed by ICP-MS. The detection limit is in the range of 0.01 mug/l. Th e method was tested using different CRMs certified for the iodine cont ent.