不同区域与品种的海带中砷富集特征的差异

Studies on the differences of the arsenic's enrichment characteristics in kelps from different regions and varieties

通过分析不同养殖海域、不同品种海带中无机砷和总砷含量在养殖期间的变化,研究海带中总砷及无机砷的富集规律。结果显示,在生长期内海带对总砷的富集呈增长趋势,而无机砷含量则逐渐降低,其占总砷的比例由3月份1.36%～1.47%下降到7月份的0.41%～0.57%;同一海域、不同品种的海带对总砷和无机砷的富集具有差异性;同时期在不同养殖海域采收的同品种海带总砷和无机砷含量差异显著。基于监测数据对海带中的无机砷进行分析,所有海带样品中无机砷含量远低于现行食品卫生标准中的限量要求,不对食用安全性造成影响。

The experiments aim to study the enrichment regularity of inorganic arsenic and total arsenic in kelp by analyzing the variation of inorganic and total arsenic in kelps which are from different maritime regions and different species during their growth.The content of inorganic arsenic is detected by HPLC-AFS,while the content of the total arsenic is examined by hydride atomic fluorescence spectrophotometry in GB/T 5009.11-2003.The results show that the enrichment in kelps of total arsenic displays an increase trend in growing season,whereas the content of inorganic arsenic is decreasing.The percentage of inorganic arsenic in total arsenic decreased from 1.36%-1.47%（March）to 0.41%-0.57%（July）.The enrichment of inorganic and total arsenic varies from kelp to kelp even they are cultivated in the same maritime region,meanwhile,the same types of kelps have dramatically different contents of inorganic and total arsenic,which depends on the variety of maritime regions.Judging from the data,the contents of inorganic arsenic in all examined kelps are far below the MRL and will have no negative effects on food safety.The study provides relevant theory foundation for food safety and processing.