Seta S, Sato H, Yoshino M, Miyasaka S
Scan Electron Microsc. 1982(Pt 1):127-40.
In order to obtain additional data for individualizing hair samples collected from the scene of crime, the authors attempted to analyze the inorganic elements in scalp hairs such as sodium, phosphorus, potassium and calcium by a SEM/EDX method. For the purpose of detecting such elements from scalp hairs efficiently, the samples were ashed on a carbon specimen mount for 60 minutes by an oxygen plasma microincineration technique. The characteristic X-ray counts of the elements were investigated as functions of hair location, viz., the frontal, the vertex, the nape, the left and the right lateral, on the head of the same person. The oxygen plasma microincineration method was very efficient in detecting sodium, phosphorus, potassium and calcium from scalp hairs. The characteristic X-ray counts of the elements, especially potassium and calcium, varied from person to person. Within the same location, the variation of X-ray counts was relatively low, with a standard deviation of less than 20%. It was observed that hairs from the frontal and the vertex locations, in general, showed lower X-ray counts for potassium than did those from the nape, the left and the right lateral locations. The calcium X-ray counts varied considerably from person to person but generally tended to give the highest value at the vertex location. The EDX spectrum pattern associated with such elements could be helpful in individualizing hair samples collected as forensic evidence.
为了获取更多数据以实现对从犯罪现场采集的毛发样本进行个体化分析，作者尝试通过扫描电子显微镜/能量色散X射线光谱法（SEM/EDX）分析头皮毛发中的无机元素，如钠、磷、钾和钙。为了有效地从头皮毛发中检测这些元素，采用氧等离子体微焚烧技术将样本在碳标本台上灰化60分钟。研究了这些元素的特征X射线计数与毛发位置的关系，即同一个人头部的额部、头顶、颈部、左侧和右侧。氧等离子体微焚烧法在从头皮毛发中检测钠、磷、钾和钙方面非常有效。这些元素的特征X射线计数，尤其是钾和钙，因人而异。在同一位置，X射线计数的变化相对较小，标准偏差小于20%。观察到，一般来说，额部和头顶位置的毛发钾的X射线计数低于颈部、左侧和右侧位置的毛发。钙的X射线计数因人而异，但通常在头顶位置的值最高。与这些元素相关的能量色散X射线光谱模式有助于对作为法医证据采集的毛发样本进行个体化分析。
