摘要
我国是海藻生产大国,藻类是人们喜爱的健康食品。但新的海藻制品卫生标准和食品中无机砷检测方法标准实施后,依照该标准检测发现海藻中的无机砷超标问题十分严重。为探讨其原因,调查了国内外的紫菜、海带等产品总砷、无机砷含量,分析了不同收割期的鲜紫菜及其加工制品以及养殖区域水质中无机砷变化情况。结果发现:按新的卫生标准及其检验方法检测,海藻中无机砷普遍超标;紫菜中的无机砷与养殖区水质中无机砷含量的变化并非成线性关系;GB/T5009.11中的两种测定方法对海藻中无机砷的检测结果有明显差异,不适用于海藻中的无机砷检测。
China is a large seaweed-producing country, and the seaweed is one of peoples favorite healthy foods. However, over-standard inorganic arsenic, which is bad for health, has been detected in seaweed recently, according to the newly promulgated sanitation standards of seaweed and the standard method of detecting inorganic arsenic in food. In order to analysis the causes of over-standard inorganic arsenic in seaweed, the author used the national stated methods to analysis the content of general arsenic and inorganic arsenic in seaweed such as laver and kelp from home and abroad. Meanwhile, the variability of inorganic arsenic contained in fresh laver of different harvest periods, together with their processing products, and the water of culturing farms has been carefully measured. The results were as follows. Firstly, the inorganic arsenic exceeded the standard at large, with the ratio of overmeasure up to 100%, according to the standard of GB 16643 - 2005 and its detecting methods. Especially the difference of percentage of inorganic arsenic to general arsenic fluctuated greatly, from the minimum discrepancy 27.0% to the maximum 79.4%. Secondly, the minimum amount of inorganic arsenic in the water of culturing farms was 0. 26 mg·kg^-1, on the contrary, the maximum amount was up to 3.16 mg·kg^-1. The content of inorganic arsenic was different not only during different harvest times from the same laver culturing farm but also from different culturing farms and different seasons. The amount of inorganic arsenic in laver of first crop was highest and the lower in latter crops. Overall, there was no a linear relationship between the contend of inorganic arsenic in laver and in the water of culturing farms. Thirdly, the matter of overmeasure inorganic arsenic was also presented in the test of different brands laver from home and abroad with the GB/T 5009.11 - 2003 stated method. With the Hydride Generation Atomic Fluorescence Spectrometry method, the range of superscale was 5.3 - 15.5 times to the standard limits, the
出处
《水产学报》
CAS
CSCD
北大核心
2008年第4期644-650,共7页
Journal of Fisheries of China
基金
福建省海洋与渔业局项目
关键词
海藻
无机砷
检测方法
seaweed
inorganic arsenic
detection methods
