A simple and rapid procedure for measuring total mercury in human hair was evaluated and compared with a conventional technique. An Advanced Mercury Analyzer (AMA-254) based on sample catalytic combustion, preconcentration by gold amalgamation, thermal desorption, and atomic absorption spectrometry (AAS) (Comb-AAS) was assessed for the direct determination of milligram quantities of human hair. Precision (% relative standard deviation) was < 7% and accuracy was determined by using two human hair reference materials (i.e., NIES No. 13 and IAEA-086) that were within the certified range. In comparison to conventional graphite-furnace atomic absorption spectrophotometry (GF-AAS), we found that our method obtained statistically equivalent results. Because total analysis time per sample was less than 10 min, the Comb-AAS method was in fact much faster than the GF-AAS method. In addition, Comb-AAS does not generate waste products and could be mainly useful for the analysis of a large amount of samples. Then, the authors suggest that this quick method could be useful for measuring mercury in human hair. Therefore, the mercury content in hair for a non-exposed group of children (n=40) living in Spain was evaluated. The mean and median hair mercury levels for the subjects under study were found to be lower than the value of 1 microg/g, corresponding to the reference dose of 0.1 microg of methylmercury per kilogram body weight set by the U.S. Environmental Protection Agency.

译文

评估了一种简单,快速的测量人发中总汞的方法,并将其与常规技术进行了比较。评估了基于样品催化燃烧,金汞齐化,热解吸和原子吸收光谱法 (AAS) (梳状AAS) 的先进汞分析仪 (AMA-254),用于直接测定毫克量的人发。精密度 (% 相对标准偏差) <7%,并且通过使用在认证范围内的两种人类毛发参考物质 (即,NIES no.13和IAEA-086) 来确定精密度。与传统的石墨炉原子吸收分光光度法 (gf-aas) 相比,我们发现我们的方法获得了统计上等效的结果。由于每个样品的总分析时间少于10分钟,因此Comb-AAS方法实际上比gf-aas方法快得多。此外,梳状AAS不会产生废物,并且可能主要用于分析大量样品。然后,作者建议这种快速方法可用于测量人发中的汞。因此,评估了居住在西班牙的未暴露儿童 (n = 40) 的头发中的汞含量。研究对象的平均和中位头发汞水平低于1微克/克的值,对应于美国环境保护署设定的每公斤体重0.1微克甲基汞的参考剂量。

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