通过物理化学处理消除用于电子顺磁共振剂量测定的牙釉质样品中的背景信号。
Elimination of the background signal in tooth enamel samples for EPR-dosimetry by means of physical-chemical treatment.
作者信息
Ivannikov A I, Tikunov D D, Skvortsov V G, Stepanenko V F, Khomichyonok V V, Khamidova L G, Skripnik D D, Bozadjiev L L, Hoshi M
机构信息
Medical Radiological Research Centre of RAMS, Obninsk, Russia.
出版信息
Appl Radiat Isot. 2001 Nov;55(5):701-5. doi: 10.1016/s0969-8043(01)00116-6.
A method of elimination of the background EPR signal in tooth enamel is proposed. This method implies treatment of enamel powder by highly active reduction reagent hydrazine with subsequent washing out by ethanol-water solution. Such treatment results in reducing both the native background signal (which is assumed to be originated by the organic component) and the mechanical induced EPR signal in enamel. Testing of the efficiency of hydrazine treatment is made for different sizes of enamel powder. It is shown that the optimal results are obtained for a powder fraction of about 100-200 microm. The radiation-induced EPR signal in enamel is practically not changed after treatment by hydrazine.
提出了一种消除牙釉质背景电子顺磁共振（EPR）信号的方法。该方法包括用高活性还原剂肼处理牙釉质粉末，随后用乙醇 - 水溶液冲洗。这种处理会降低天然背景信号（假定由有机成分产生）以及牙釉质中的机械诱导EPR信号。针对不同粒度的牙釉质粉末对肼处理的效率进行了测试。结果表明，对于约100 - 200微米的粉末粒度可获得最佳结果。经肼处理后，牙釉质中的辐射诱导EPR信号实际上没有变化。
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