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| 三辛烷叔胺萃取分光光度法测定水中钍 |
| Study on the Determination of Thorium in Water by Trioctyl Tertiary Amine Extraction Spectrophotometry |
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| DOI： |
| 中文关键词: 钍 三辛烷叔胺 萃取 分光光度法 水质 |
| 英文关键词: Thorium Trioctyl tertiary amine Extraction Spectrophotometry Water quality |
| 基金项目:江苏省环保科研基金资助项目(2016036) |
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| 中文摘要: |
| 采用氢氧化铁共沉淀载带水中钍，经浓硝酸溶解沉淀后，采用三辛烷基叔胺(N-235)混匀溶液萃取，盐酸反萃取，进一步纯化分离钍，与铀试剂Ⅲ形成络合物后用分光光度法测定。方法在0.05 mg/L~0.500 mg/L范围内线性良好，方法检出限为0.025 μg/L，探测下限为0.10 μg/L。将该方法用于实际水样的测定，6次测定结果的RSD为7.0%～196%，回收率为90.0%～92.4%。 |
| 英文摘要: |
| Thorium in water was concentrated by Fe(OH)3 coprecipitation. The precipitate was dissolved in concentrated HNO3. With trioctyl tertiary amine (N 235) extraction and hydrochloric acid reextraction for further separation, thorium was then determined by spectrophotometry using uranium reagent Ⅲ . The method had good linearity in the range of 0.05 mg/L to 0.500 mg/L. The method detection limit was 0.025 μg/L and the lower limit of quantitation was 0.10 μg/L. Applied this method to practical water sample determination, the RSDs of six duplicated measurements were from 7.0% to 19.6%, and the recoveries were from 90.0% to 92.4%. |
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