Radiochemistry Capability/Capacity Development - Alpha Spectroscopic Analyses in Food and Feed

1摘要： 2华盛顿州公共卫生实验室（WAPHL）环境和辐射 3化学集团有一个长期建立和良好的辐射测试计划， 4套强大的仪器，包括伽马和阿尔法光谱功能。下 5个先前的项目，该实验室开发并验证了有效的测量方法， 使用固体放射性同位素测定空气和土壤基质中人造超铀元素的6 α放射性同位素 7相位提取和高分辨率阿尔法光谱测定。 8背景 包括FDA在内的9个联邦政府机构通过FERN致力于 10为发展环境辐射筛查能力提供大量资源 11个样本，包括过去20年的食物。这项工作的大部分合理地 12集中于使用伽马光谱的非破坏性分析。 13问题 14.有一些重要的放射性物质无法探测到， 15，使用伽马光谱法对食品有意义的水平，包括阿尔法发射体，如 铀、钚和镅的16种同位素。 17解决方案 18通过本项目中提出的工作，我们将利用粮食计划署的投资， 19和药品管理局（FDA）的资产和专业知识，以提高我们的快速化学 20种针对食品的α放射性核素的分离和测量方法 21矩阵，购买更多的阿尔法光谱仪，并培训更多的放射化学家， 22、做好这项工作

1 Abstract: 2 The Washington State Public Health Laboratories (WAPHL) Environmental and Radiation 3 Chemistry Group has a long-established and well-regarded radiation testing program with a 4 robust set of instrumentation, including gamma and alpha spectroscopy capabilities. Under 5 previous projects, this laboratory developed and validated effective methods for measuring 6 alpha-emitting isotopes of man-made transuranic elements in air and soil matrices using solid 7 phase extraction and high-resolution alpha spectrometry. 8 Background 9 Agencies of the Federal government including the FDA through FERN have devoted 10 considerable resources to developing radiological screening capabilities for environmental 11 samples including food over the past two decades. The majority of this work has reasonably 12 centered on non-destructive assay using gamma spectroscopy. 13 Problem 14 There are a number of important radioactive materials of dose concern that cannot be detected 15 at levels meaningful for food using gamma spectroscopy, including alpha emitters such as 16 isotopes of uranium, plutonium and americium. 17 Solutions 18 Through the work proposed in this project we will leverage the investments made by the Food 19 and Drug Administration (FDA) in assets and expertise, to improve our rapid chemical 20 separation and measurement methods for alpha emitting radionuclides to address food 21 matrices, to purchase additional alpha spectrometers and to train additional radiochemists to 22 perform this work.