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首页> 外文期刊>International journal of PIXE >STUDIES ON DAILY CHANGES OF ELEMENTAL CONCENTRATION IN BEARD SAMPLES BY MEANS OF THE STANDARD-FREE METHOD
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STUDIES ON DAILY CHANGES OF ELEMENTAL CONCENTRATION IN BEARD SAMPLES BY MEANS OF THE STANDARD-FREE METHOD

机译：用标准方法研究胡子样品中元素的每日变化

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摘要

We developed and reported a standard-free method for beard (including mustache and whiskers) samples that enables us to quantitatively analyze powdered beard samples of extremely small quantity. In order to investigate intake of essential elements and also exposure to toxic elements, daily changes of elemental concentration in the body give us essential information. Firstly, we have measured dependence of elemental concentration in beard, mustache and whiskers on the collecting regions in the face. Then, daily changes of elemental concentration in the body, which reflect daily ingestion of foods and waters, have been estimated by means of quantitative analyses of beard samples. These beard samples were taken from three persons everyday over successive 7, 14 and 33 days, respectively. As a result, some elements show long-term changes and a few toxic elements such as arsenic and lead exhibit changes in a period of a few days. We have also measured daily changes of elemental concentration in urine and beard taken from the same person at the same time every half day over 10 days, and clear correlation of daily changes of the arsenic concentration between urine and beard samples was observed. It is found that the standard-free method is quite effective for beard samples of very small quantities, and that beard analyses are quite suited to studies on daily changes of elemental concentration in the human body in comparison with the other samples depending on the elements.
机译：我们开发并报告了胡须（包括胡须和胡须）样品的无标准方法，使我们能够定量分析极少量的胡须粉样品。为了调查必需元素的摄入量以及是否暴露于有毒元素，人体中元素浓度的每日变化为我们提供了重要信息。首先，我们测量了胡须，胡须和胡须中元素浓度对面部收集区域的依赖性。然后，通过对胡须样品的定量分析，估计了人体中元素浓度的日变化，这些变化反映了食物和水的每日摄入量。这些胡须样本分别在连续的7、14和33天内每天从三个人那里获取。结果，某些元素会显示长期变化，而一些有毒元素（例如砷和铅）会在几天内发生变化。我们还测量了在10天内每半天同一时间从同一人同时采集的尿液和胡须中元素浓度的每日变化，并且观察到尿液和胡须样品中砷浓度的每日变化之间存在明显的相关性。已经发现，无标准方法对于非常少量的胡须样品非常有效，并且胡须分析与其他样品（取决于元素）相比，非常适合研究人体中元素浓度的每日变化。

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