【摘要】 本文介绍了过氧化钠熔融样品、CL-TBP 萃淋树脂分离基体元素,铀试剂Ⅱ分光光度法测定石煤(渣)和炭化砖中微量钍的方法。方法的最低检出浓度为6.4μg/L,全程回收率为95.8%—104.0%,相对偏差小于10%,对铀和其它元素有较好的分离效果。本方法的测定结果和γ谱仪测定值基本一致。更多还原

【Abstract】 Arsenazo Ⅲ spectrophotometric determination of trace thorium in bone coal(dregs)and carbonizated brick is discussed in this paper.As pretreatment procedure basicmelting with sodium peroxide and separation of thorium from impurities with CL-TBP ex-tracting resin were used.The detection limit of concentration was 6.4μg/L,relative stan-dard deviation less than 10% and chemical recovery from 95.8% to 104.0%.The results ap-proximated to those measured by γ-spectrometry.The determination was not interfered byuranium and other compronents in the samples.更多还原