中华放射医学与防护杂志
中華放射醫學與防護雜誌
중화방사의학여방호잡지
Chinese Journal of Radiological Medicine and Protection
2011年
4期
478-481
,共4页
生物样品%有机氚%燃烧%液体闪烁计数
生物樣品%有機氚%燃燒%液體閃爍計數
생물양품%유궤천%연소%액체섬삭계수
Biological samples%Organically bound tritium%Combustion%Liquid scintillation counting(LSC)
目的 为监测生物样品中氚,设计一套前处理装置,并进行性能评估.方法 使用标准氚水拟合探测效率的标准曲线.利用高、中、低3种不同活度标准氚水和3H-TdR,分别测定自由水氚和有机氚的前处理化学回收率,并对3种生物样品中氚进行比对测量.结果 拟合的标准曲线可以用于环境中氚放射性测量,氚的仪器探测效率为23.3%.该装置在处理加标样的40.0 g的大米样品时,对标准氚水和3H-TdR平均化学回收率为95.4%,重复性较好.本单位和江苏省辐射环境监测管理站的生物样品比对测量结果分别为小麦1.74和1.80 Bq/kg,紫菜3.44和2.50 Bq/kg,茶叶3.28和5.50 Bq/kg,比对结果接近.结论 设计的前处理装置可以用于环境生物样品中有机氚的测量.
目的 為鑑測生物樣品中氚,設計一套前處理裝置,併進行性能評估.方法 使用標準氚水擬閤探測效率的標準麯線.利用高、中、低3種不同活度標準氚水和3H-TdR,分彆測定自由水氚和有機氚的前處理化學迴收率,併對3種生物樣品中氚進行比對測量.結果 擬閤的標準麯線可以用于環境中氚放射性測量,氚的儀器探測效率為23.3%.該裝置在處理加標樣的40.0 g的大米樣品時,對標準氚水和3H-TdR平均化學迴收率為95.4%,重複性較好.本單位和江囌省輻射環境鑑測管理站的生物樣品比對測量結果分彆為小麥1.74和1.80 Bq/kg,紫菜3.44和2.50 Bq/kg,茶葉3.28和5.50 Bq/kg,比對結果接近.結論 設計的前處理裝置可以用于環境生物樣品中有機氚的測量.
목적 위감측생물양품중천,설계일투전처리장치,병진행성능평고.방법 사용표준천수의합탐측효솔적표준곡선.이용고、중、저3충불동활도표준천수화3H-TdR,분별측정자유수천화유궤천적전처이화학회수솔,병대3충생물양품중천진행비대측량.결과 의합적표준곡선가이용우배경중천방사성측량,천적의기탐측효솔위23.3%.해장치재처리가표양적40.0 g적대미양품시,대표준천수화3H-TdR평균화학회수솔위95.4%,중복성교호.본단위화강소성복사배경감측관리참적생물양품비대측량결과분별위소맥1.74화1.80 Bq/kg,자채3.44화2.50 Bq/kg,다협3.28화5.50 Bq/kg,비대결과접근.결론 설계적전처리장치가이용우배경생물양품중유궤천적측량.
Objective To design a new pre-treatment device and to evaluate its efficiency in order to monitor the tritium levels in biological samples.Methods The detection efficiency of tritium was determined with standard tritiated water.Recovery of tritiated water and organically bound tritium (OBT) were detected with high, medium and low activities of standard tritiated water and 3H-TdR (tritiated thymidine), respectively.Comparison of three kinds of biological samples using different pre-treatment devices was shown.Results The standard curve can be used in environmental tritium measurement and the detection efficiency for tritium was 23.3%.When 40.0 g rice with standard HTO or 3H-TdR was pretreated with this device, the average recovery of HTO and OBT was about 95.4% , which showed good reproducibility.The comparison results were similar.Conclusions The pre-treatment device can be used to survey the OBT in environmental biological samples.
