Simultaneous measurement of Re–Os and S isotopic compositions of sulfur-bearing minerals using a Carius tube digestion-based N-TIMS and MC-ICP-MS approach

2018 ◽  
Vol 33 (6) ◽  
pp. 1057-1067 ◽  
Author(s):  
Shengling Sun ◽  
Jie Li ◽  
Le Zhang ◽  
Lu Yin ◽  
Jing Zhang
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Thermal Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Inductively Coupled ◽  
Isotopic Compositions ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Thermal Ionization Mass

This study reports an improved procedure for the simultaneous determination of Re–Os and S isotopic compositions of sulfur-bearing minerals using negative thermal ionization mass spectrometry (N-TIMS) and multicollector-inductively coupled plasma-mass spectrometry (MC-ICP-MS), respectively.

scholarly journals Precise Measurement of Tellurium Isotope Ratios in Terrestrial Standards Using a Multiple Collector Inductively Coupled Plasma Mass Spectrometry

Molecules ◽  
2020 ◽  
Vol 25 (8) ◽  
pp. 1956
Author(s):  
Rajamanickam Murugan ◽  
Tatsuo Aono ◽  
Sarata Kumar Sahoo
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Isotope Ratio ◽  
Thermal Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Ratio Measurement ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Thermal Ionization Mass

Precise tellurium (Te) isotope ratio measurement using mass spectrometry is a challenging task for many decades. In this paper, Te isotope ratio measurements using multi-collector inductively coupled plasma mass spectrometry (MC–ICP–MS) in terrestrial Te standards have been reported. Newly developed Faraday cup with 1012 Ω resistor is used to measure low abundance 120Te, whereas the 1011 Ω resistor is used to measure other Te isotopes. The relative standard deviation obtained for Te isotope ratio measurement by Faraday cups of 120Te/128Te [0.002907(05)], 122Te/128Te [0.079646(10)], 123Te/128Te [0.027850(07)], 125Te/128Te [0.221988(09)], 126Te/128Te [0.592202(20)], and 130Te/128Te [1.076277(30)] were 0.140%, 0.014%, 0.026%, 0.005%, 0.004%, and 0.004%, respectively. The measured isotope ratio results are compared with previous results obtained by thermal ionization mass spectrometry (TIMS), negative thermal ionization mass spectrometry (N–TIMS), and MC–ICP–MS, showing an improvement in the precision about one order of magnitude for 120Te/128Te ratio. The present study shows better precision for Te isotope ratios compared to earlier studies.

An Improved Fe—Ni Sulfide Fire Assay Method for Determination of Re, Platinum Group Elements, and Os Isotopic Ratios by Inductively Coupled Plasma- and Negative Thermal Ionization—Mass Spectrometry

2009 ◽  
Vol 63 (11) ◽  
pp. 1232-1237 ◽  
Author(s):  
Yali Sun ◽  
Zhuyin Chu ◽  
Min Sun ◽  
Xiaoping Xia
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Thermal Ionization Mass Spectrometry ◽  
Assay Method ◽  
Ionization Mass ◽  
Isotopic Ratios ◽  
Fire Assay ◽  
Inductively Coupled ◽  
Thermal Ionization Mass

An improved Fe–Ni sulfide fire assay method has been developed for determination of Re, the platinum group elements (PGE), and Os isotopic ratios using inductively coupled plasma–mass spectrometry (ICP-MS) and negative thermal ionization–mass spectrometry (NTI-MS). Recovery of Re using the neoclassical NiS fire assay technique is very low, but recoveries of up to 75% can be achieved by using Fe–Ni sulfide as a collector and Na2B4O7 as a flux. Using isotope dilution for determination of Re, a number of standard reference materials were analyzed for PGE and Re, and the results are consistent with their certified values. Multiple analyses of the reference standard GBW 07290 produced precisions ranging from 2.2% for Os to 5.9% for Ir. The detection limits are 2 pg g−1 for Ru, 1.5 pg g−1 for Rh, 25 pg g−1 for Pd, 23 pg g−1 for Re, 0.7 pg g−1 for Os, 1 pg g−1 for Ir, and 6 pg g−1 for Pt. The low procedural blank of Os (1.3 pg g−1) makes the Fe–Ni sulfide fire assay suitable for analysis of Os isotopic compositions. Using NTI-MS, the 187Os/188Os ratios were measured for WPR-1 and they are consistent with literature values.

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