Determination of 57 elements in Occluded Metals in Iron-manganese Oxides by High Resolution Inductively Coupled Plasma Mass Spectrometry
Received:November 09, 2019  Revised:November 21, 2019
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DOI:doi:10.3969/j.issn.2095-1035.2020.03.011
KeyWord:Active State Elements; Occluded Metals in Iron-manganese Oxides; High Resolution Inductively Coupled Plasma Mass Spectrometry(HR-ICP-MS)
              
AuthorInstitution
jinliguo 黑龙江省第一地质勘查院
CAO Changmao 河北省地矿局第八地质大队
HU Mengying 中国地质科学院地球物理地球化学勘查研究所,
XU Jinli 中国地质科学院地球物理地球化学勘查研究所,河北 廊坊
XU Hongna 牡丹江医学院,黑龙江 牡丹江
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Abstract:
      As a new method of deep-penetrating geochemistry, the analytical technique for determination of active state element can provide data support for searching for concealed ore bodies. In this method, ELEMENT XR high resolution plasma mass spectrometry (HR-ICP-MS) is introduced into the analysis of the active stateelements which has powerful advantages in dynamic linear range (10-12~1012) and high sensitivity. It extends the simultaneous determination of more than 57 elements and greatly improves the working efficiency. In this study, we optimized the main instrumental conditions of HR-ICP-MS such as auxiliary gas flow, sample gas flow and sampling depth based on the experimental results and Response Surface Methodology. Then we systematically studied the extraction conditions, and we investigated the effects of extraction time, liquid-solid ratio, centrifugal rotating speed and extracting solution storage time on the extraction efficiency. The extraction conditions were improved and the optimum extraction conditions were determined: the extraction time was 24 h, the liquid-solid ratio was 15:1, and the centrifugal rotating speed was 4000 rpm. Finally, we established the HR-ICP-MS method for the analysis of 57 elements and obtained the detection limits and precision of each element in Occluded Metals in Iron-manganese Oxides. The detection limit of trace elements reached 10-9, and the major elements is 10-6.The precision is 2.26%~32.5%, which can meet the current requirements of analysis and determination of active state elements.
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