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本文研究了一个测定弱放废水中铯-137的简单快速方法。在加入铯载体和络合剂柠檬酸的碱性介质中,用4-另-丁基-2-(α-甲苄基)酚(简称BAMBP)-煤油萃取,洗涤后用10∶1冰醋酸反萃,以碘铋酸铯形式沉淀铯,制源、测量β放射性。方法用于测定铯-137含量约为10~(-6)居里/升的废水,四个样品需2小时,单值相对标准偏差为±3.6%;用于测定铯-137含量约为10~(-9)居里/升的废水,两个样品需1.5小时,单值相对标准偏差为±5.3%。
In this paper, a simple and rapid method for determination of cesium-137 in weak discharge wastewater was studied. Extract with 4-but-butyl-2- (a-methylbenzyl) phenol (referred to as BAMBP) -kerosene in an alkaline medium with cesium support and complexing agent citric acid, wash with 10: 1 glacial acetic acid Stripping, precipitation of cesium as cesium iodide bismuth, source, measure beta radioactivity. The method was applied to the determination of wastewater with a cesium-137 content of about 10-6 (Curie / liter). The four samples required two hours with a relative standard deviation of ± 3.6%. The method was applied to the determination of cesium-137 content of about 10 ~ (-9) Curie / L wastewater, 1.5 hours for both samples with a relative standard deviation of ± 5.3%.