Iodine distribution in blades of several Laminarias grown in the same sea area

The iodine distribution of finely divided blades of Laminaria (mitsuishi-kombu, ma-kombu, and cultured ma-kombu) was studied by an electrochemical detector with an IRICA RP-18T (reverse phase ODS) column using samples subjected to alkali combustion. In the case of Mitsuishi-kombu (Laminaria angustata), iodine contents were relatively high in the basal parts. Iodine contents in on sample of Ma-kombu (Laminaria japonica) were found to be high in the upper parts, while those of other samples were considerably high in the basal parts. In cultured Ma-konbu (Laminaria japonica) while those of other samples central parts contained more iodine than other parts. The sums of iodine contents obtained from the divided samples were 230-340mg/100g in Mitsuishi-kombu, 130-289mg/100g in Ma-kombu, and 180-245mg/100g in the cultured Ma-kombu, respectively.