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目的 对饮用水中的14C含量进行测定,并对其可能产生的内照射剂量进行估算,以评价其对人体健康的影响.方法 采集福建省和海南省的自来水和井水样品进行无机14C含量的测定,采用鼓泡法作前处理,直接吸收法制备样品,液闪谱仪测量.结果 16个样品的分析结果表明不同地区的自来水14C含量存在较大差别,井水与自来水中的无机14C含量也存在明显差异.居民饮用井水和自来水途径摄入的14C所致的有效剂量存在差别.结论 公众通过饮用水途径摄入的14C所致的待积有效剂量基本在10-9 Sv/a量级,可以认为天然环境下,从饮用水途径造成的14C内照射剂量很低,不会对人体造成影响.“,”Objective To evaluate the effects on human health of carbon-14 in drinking water by determining it and estimating the in-take dose.Methods Inorganic radiocarbon concentration in some tap-water and well water samples from Fujian and Hainan province were determined.A simple inorganic radiocarbon measurement procedure was employed,using the bubbling and direct absorption method,followed by low-level liquid scintillation spectrometry.Results The results of sixteen samples showed there was difference in tap-water from different district,and there was difference between tap-water and well waer.The effective dose caused by drinking well water was different from tap-water.Conclusion The effective dose caused by drinking water which was about 10-9 Sv/a,impact on health can be ignored.