Sensitive monitoring of iodine species in sea water using capillary electrophoresis: vertical profiles of dissolved iodine in the Pacific Ocean
Sensitive monitoring of iodine species in sea water using capillary electrophoresis: vertical profiles of dissolved iodine in the Pacific Ocean
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DOI：
10.1039/b501398d
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发表时间：
2005-01-01
影响因子：
--
通讯作者：
Hirokawa, T
中科院分区：
文献类型：
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作者：
Huang, Z;Ito, K;Hirokawa, T
采用一种新的高灵敏度毛细管电泳法测定了北太平洋(0~5500m)样品中总碘、碘酸盐、总无机碘、溶解有机碘和总碘的垂直分布。一组广泛的数据表明，2003年2月至3月在北太平洋巡航期间收集的海水中碘的行为并不保守，而是与溶解氧和硅、氮和磷等营养元素的浓度变化有关。这表明碘的垂直分布与生物活动有关。在真光区发现了溶解的有机碘，这与海洋其他地方的观测结果一致。垂直职业选手。溶解有机碘的LE似乎也与生物地球化学活动有关。所有测得的碘的浓度在1000米以上变化明显，但在1000米以下只有很小的纬度变化，在2400米以下可以观察到轻微的垂直变化。这些发现被认为反映了地层。水体中具有不同生物活性的营养盐和碘物种的阳离子。
Using a novel high-sensitivity capillary electrophoretic method, vertical distributions of iodate, iodide, total inorganic iodine, dissolved organic iodine and total iodine in the North Pacific Ocean (0-5500 m) were determined without any sample pre-treatment other than UV irradiation before total iodine analysis. An extensive set of data demonstrated that the iodine behaviour in the ocean water collected during a cruise in the North Pacific Ocean in February-March 2003 was not conservative but correlated with variations in concentrations of dissolved oxygen and nutrient elements such as silicon, nitrogen and phosphorus. This suggests that the vertical distribution of iodine is associated with biological activities. The dissolved organic iodine was found in the euphotic zone in accord with observations elsewhere in the oceans. The vertical pro. le of dissolved organic iodine also appears to be related to biogeochemical activity. The concentrations of all measured iodine species vary noticeably above 1000 m but only minor latitudinal changes occur below 1000 m and slight vertical alterations can be observed below 2400 m. These findings are thought to reflect the strati. cation of nutrients and iodine species with different biological activities in the water column.