Knowles T G, Farrington D, Kestin S C
University of Bristol School of Veterinary Science, Langford, Bristol BS40 5DU, UK.
Food Addit Contam. 2003 Sep;20(9):813-8. doi: 10.1080/0265203031000152398.
Total mercury concentrations were measured in fish and shellfish and their products imported into the UK and also in UK-produced farmed salmon and trout. Three hundred and thirty-six samples were collected using a two-stage sampling plan. The sample plan was weighted to reflect consumption, but with some bias towards fish that might accumulate higher levels of mercury, such as large predatory fish at the top of the food chain. The highest levels of total mercury were found in billfish (swordfish and marlin) and shark. Mercury concentrations in the five samples of fresh/frozen shark ranged from 1.006 to 2.200 mg kg(-1), all above the European Commission limit for the species, and concentrations in 20 samples of fresh/frozen billfish ranged from 0.153 to 2.706 mg kg(-1) with 13 samples above the 1.0 mg kg(-1) limit for the species. One sample of Antarctic ice fish was collected and had a mercury concentration of 0.664 mg kg(-1). The limit for this species was 0.5 mg kg(-1). One sample of fresh/frozen tuna out of the 20 collected had a mercury concentration above the limit of 1.0 mg kg(-1) (1.5 mg kg(-1)), but all other fresh tuna samples were well within the regulatory limit (average 0.4 mg kg(-1)). Mercury concentrations in canned tuna were lower with concentrations on average half that measured in fresh/frozen tuna. Mercury concentrations in UK-farmed salmon and trout were relatively low. The maximum concentration found in 46 samples of fresh/frozen or smoked trout and salmon was 0.103 mg kg(-1).
对进口到英国的鱼类、贝类及其制品，以及英国养殖的鲑鱼和鳟鱼中的总汞浓度进行了测量。采用两阶段抽样方案收集了336个样本。抽样方案经过加权以反映消费量，但对可能积累较高汞含量的鱼类存在一定偏差，例如食物链顶端的大型掠食性鱼类。在旗鱼（剑鱼和枪鱼）和鲨鱼中发现了最高水平的总汞。五个新鲜/冷冻鲨鱼样本中的汞浓度在1.006至2.200毫克/千克（-1）之间，均高于欧盟委员会对该物种的限制，20个新鲜/冷冻旗鱼样本中的汞浓度在0.153至2.706毫克/千克（-1）之间，其中13个样本高于该物种1.0毫克/千克（-1）的限制。收集了一个南极冰鱼样本，其汞浓度为0.664毫克/千克（-1）。该物种的限制为0.5毫克/千克（-1）。在收集的20个新鲜/冷冻金枪鱼样本中，有一个样本的汞浓度高于1.0毫克/千克（-1）的限制（1.5毫克/千克（-1）），但所有其他新鲜金枪鱼样本均远低于监管限制（平均0.4毫克/千克（-1））。罐装金枪鱼中的汞浓度较低，平均浓度为新鲜/冷冻金枪鱼测量值的一半。英国养殖的鲑鱼和鳟鱼中的汞浓度相对较低。在46个新鲜/冷冻或烟熏鳟鱼和鲑鱼样本中发现的最高浓度为0.103毫克/千克（-1）。
