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

1摘要： 华盛顿州公共卫生实验室(WAPHL)环境与辐射 3化学集团有一个久负盛名的辐射测试计划， 4一套强大的仪器，包括伽马和阿尔法光谱分析能力。在……下面 5个以前的项目，该实验室开发并验证了有效的测量方法 空气和土壤基质中人造超铀元素的6个α发射同位素 7相提取和高分辨率阿尔法光谱分析。 8背景 联邦政府的9个机构，包括FDA通过弗恩，已经致力于 10大量资源用于发展环境辐射筛查能力 11个样本，包括过去20年的食物。这项工作的大部分都有合理的 12以伽玛能谱无损分析为中心。 13个问题 有许多重要的剂量问题放射性物质是无法检测到的。 15个对食物有意义的水平，使用伽马光谱，包括阿尔法发射体，如 铀、钚和汞的16种同位素。 17种解决方案 18通过这个项目中提出的工作，我们将利用粮食公司所做的投资 19和药品监督管理局(FDA)的资产和专业知识，以改善我们的快速化学 20食品用α放射性核素的分离和测量方法 21个矩阵，购买额外的阿尔法能谱仪，并培训额外的放射化学家 22执行这项工作。

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.