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RAPID DETERMINATION OF ~(226)Ra IN URINE SAMPLES

机译:快速测定尿样中的〜(226)Ra

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摘要

A new radiochemical separation method has been developed for rapid analysis of ~(226)Ra in urine samples. In this method, radium is separated from urine matrix using cation and anion exchange column chromatography. A Ra tracer is added, together with its parent in the ~(228)Th standard, for chemical recovery correction. After separation, the sample is precipitated with hydrous titanium oxide and then prepared for counting by creating a thin-layer counting source using BaSO_4 micro-precipitation. The radium isotopes are then counted by alpha spectrometry. Replicate spike and blank samples were analysed for validation of the procedure. The detection limit was determined to be 0.22 Bq 1~(-1) with 4 h of counting for 20 ml of urine sample. Using this method, the results can be reported within an 8 h turn-around time. This method is suitable for quick dose assessment of ~(226)Ra exposure following a radiation emergency.
机译:已经开发了一种新的放射化学分离方法,用于快速分析尿液样品中的〜(226)Ra。在这种方法中,使用阳离子和阴离子交换柱色谱从尿液基质中分离出镭。添加了Ra示踪剂及其在〜(228)Th标准中的母体,用于化学回收校正。分离后,将样品用含水的氧化钛沉淀,然后通过使用BaSO_4微沉淀创建薄层计数源来准备进行计数。然后通过α光谱法对镭的同位素进行计数。分析重复的加标样品和空白样品以验证程序。测定的最低限度为0.22 Bq 1〜(-1),对20 ml尿液样品进行4小时计数。使用此方法,可以在8小时的转换时间内报告结果。此方法适用于在放射紧急情况后〜(226)Ra暴露的快速剂量评估。

著录项

  • 来源
    《Radiation Protection Dosimetry》 |2012年第1期|p.30-35|共6页
  • 作者单位

    Chalk River Laboratories, Atomic Energy of Canada Limited, Chalk River, ON, Canada KOJ 1J0;

    Chalk River Laboratories, Atomic Energy of Canada Limited, Chalk River, ON, Canada KOJ 1J0;

    Radiation Protection Bureau, Health Canada, 775 Brookfield Rd, Ottawa, ON, Canada K1A 1C1;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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