世界核地质科学2024，Vol.41Issue(1)：63-72,10.DOI:10.3969/j.issn.1672-0636.2024.01.006
氢化物发生-电感耦合等离子体质谱法测定砂岩型铀矿样品中痕量镉
Determination of trace cadmium in sandstone type uranium ore samples by hydride generation inductively coupled plasma mass spectrometry
摘要
Abstract
In sandstone type uranium ore samples,the cadmium content to be measured is low,and there are different types of mass spectra interference for each mass abundance.Moreover,the content of interfering elements also differs greatly,which brings significant challenges to the accurate measurement of trace cadmium using inductively coupled plasma mass spectrometry.In order to accurately measure the cadmium content in sandstone type uranium ore samples,it is necessary to overcome the different types of mass spectral interference in the samples.The hydride generation inductively coupled plasma mass spectrometry technique was used,in which the measured cadmium element was vaporized and measured in the mass spectrometer,which effectively overcame the issue of mass spectral interference for cadmium measurement and improve the sensitivity of cadmium.A method for accurately determining trace cadmium in sandstone type uranium ore samples using microwave digestion and continuous flow injection hydride generation-inductively coupled plasma mass spectrometry was established.Hydrochloric acid solution was used as the medium,and a thiourea-ferrocyanide masking solution was added.Ammonium dihydrogen phosphate and strontium ions were used as sensitizers.The selection and concentration of the medium,concentration of potassium borohydride,selection,and quantity of cadmium sensitizer were optimized,which effectively solved the problem of interference from coexisting ions.The method established for determining trace cadmium in sandstone type uranium ore samples using continuous flow injection hydride generation-inductively coupled plasma mass spectrometry has the characteristics of low detection limit,high accuracy,good precision,and wide applicability.The detection limit of the method is 0.001 µg·g-1,and the precision is better than 8.80%(characterized by the relative standard deviation RSD from multiple measurements).关键词
砂岩型铀矿/痕量镉/氢化物发生/电感耦合等离子体质谱/质谱干扰Key words
sandstone type uranium ore samples/trace cadmium/hydride generation/Inductively coupled plasma mass spectrometry/mass spectrometry interference分类
化学化工引用本文复制引用
张良圣,常阳,谢灵扬,赵国英,张琪,张建新,梁潇,张彦辉..氢化物发生-电感耦合等离子体质谱法测定砂岩型铀矿样品中痕量镉[J].世界核地质科学,2024,41(1):63-72,10.基金项目
受国防科技工业局项目(编号:JSJL2020201A003)资助 Supported by State Administration of Science,Technology and Industry for National Defence,DRC(No:JSJL2020201A003) （编号:JSJL2020201A003）
