van Netten C, Hoption Cann S A, Morley D R, van Netten J P
Department of Health Care and Epidemiology, University of British Columbia, Vancouver, Canada.
Sci Total Environ. 2000 Jun 8;255(1-3):169-75. doi: 10.1016/s0048-9697(00)00467-8.
Edible seaweed products have been used in many countries, specifically Japan, as a food item. Recently these products have become popular in the food industry because of a number of interesting medicinal properties that have been associated with certain edible marine algae. Very little control exists over the composition of these products, which could be contaminated with a number of agents including heavy metals and certain radioactive isotopes. Fifteen seaweed samples (six local samples from the coast of British Columbia, seven from Japan, one from Norway and one undisclosed) were obtained. All samples were analyzed for multiple elements, using ICP mass spectrometry and for radioactive constituents. It was found that six of eight imported seaweed products had concentrations of mercury orders of magnitude higher than the local products. Lead was found at somewhat higher concentrations in only one local product. Laminaria japonica had the highest level of iodine content followed by Laminaria setchellii from local sources. Only traces of cesium-137 were found in a product from Norway and radium-226 was found in a product from Japan. Arsenic levels were found to be elevated. In order to estimate the effect of these levels on health, one needs to address the bioavailability and the speciation of arsenic in these samples.
可食用海藻产品在许多国家，特别是日本，已被用作食品。最近，由于某些可食用海藻具有一些有趣的药用特性，这些产品在食品工业中变得很受欢迎。对这些产品的成分控制很少，它们可能会被包括重金属和某些放射性同位素在内的多种物质污染。获取了15个海藻样本（6个来自不列颠哥伦比亚海岸的本地样本、7个来自日本的样本、1个来自挪威的样本和1个未公开来源的样本）。所有样本都使用电感耦合等离子体质谱法分析了多种元素，并分析了放射性成分。结果发现，8种进口海藻产品中有6种汞含量比本地产品高出几个数量级。仅在一种本地产品中发现铅的浓度略高。海带的碘含量最高，其次是本地来源的赛氏海带。在一种来自挪威的产品中仅发现微量的铯 - 137，在一种来自日本的产品中发现了镭 - 226。发现砷含量升高。为了评估这些含量对健康的影响，需要研究这些样本中砷的生物可利用性和形态。
