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ZHOU An-li, WU Zhi-yuan, NING Hai-long, WANG Dong, YANG Li, LÜ Xin-ming. Determination of 15 Rare Earth Elements in Hetian Jade by Inductively Coupled Plasma-Mass Spectrometry with High-pressure Closed Digestion[J]. Rock and Mineral Analysis, 2020, 39(3): 451-458. DOI: 10.15898/j.cnki.11-2131/td.201907170106
Citation: ZHOU An-li, WU Zhi-yuan, NING Hai-long, WANG Dong, YANG Li, LÜ Xin-ming. Determination of 15 Rare Earth Elements in Hetian Jade by Inductively Coupled Plasma-Mass Spectrometry with High-pressure Closed Digestion[J]. Rock and Mineral Analysis, 2020, 39(3): 451-458. DOI: 10.15898/j.cnki.11-2131/td.201907170106
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Determination of 15 Rare Earth Elements in Hetian Jade by Inductively Coupled Plasma-Mass Spectrometry with High-pressure Closed Digestion

    Abstract
  • BACKGROUNDThere are abundant rare earth elements in Hetian jade. The accurate determination of the content of rare earth elements is of great significance for revealing the source of ore-forming materials, the nature of ore-forming fluids and the genesis of the deposit.OBJECTIVESTo compare the different acid systems in microware digestion and investigate the elimination test of polyatomic interferences, so as to develop a method for the determination of REE in Hetian jade by inductively coupled plasma-mass spectrometry (ICP-MS) with microwave digestion.METHODSAfter comparing the efficiency of HNO3-HF acid dissolution and Li2B4O7-LiBO2 fusion, the Hetian jade samples were digested by HNO3-HF. Fifteen rare earth elements were determined by ICP-MS. 103Rh and 49In are used as internal isotopes to complement matrix effect and correct sensitivity drift, in order to reduce matrix effect.RESULTSThe detection limits of the method were 0.0008-0.0091μg/L, whereas the recoveries were 101.0%-120.0%. The relative standard deviation was 0.55%-1.83%(n=11).CONCLUSIONSThis method uses less acid and has a low blank value. It is applied to the analysis of Hetian jade in different regions. The distribution pattern of rare earth elements is characterized by right-inclined light rare earth enrichment, which provides constraints on the genesis of the jade deposit.

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