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Mengning Dai
Northwest University (United States)
11Publications
5H-index
602Citations
Publications 9
Newest
#1Zhian Bao (Northwest University (United States))H-Index: 8
#2Chunlei Zong (Northwest University (United States))H-Index: 6
Last.Mengning Dai (Northwest University (United States))H-Index: 5
view all 6 authors...
In this study, we established a rapid acid digestion for determining Hf–Sr–Nd isotopic ratios of geological samples by using MC-ICP-MS. Conditions of 1600 °C for 1 min and 1400 °C for 1 min were adopted for fusing intrusive rocks and extrusive rocks, respectively. The rapid acid digestion technique is superior in digestion time compared with high-pressure PTFE bomb method. The procedural blanks of the method were also lower than that flux fusion. Replicate analyses of international certified ref...
3 CitationsSource
#1Zhian Bao (Northwest University (United States))H-Index: 8
#2Lu Chen (Northwest University (United States))H-Index: 3
Last.Mengning Dai (Northwest University (United States))H-Index: 5
view all 6 authors...
Controlling the accuracy and precision of sulfur and lead isotopic compositions in natural sulfide minerals requires the use of well-characterized reference materials with matrices similar to those of the unknown samples being analyzed. However, it is often a challenge to prepare natural or synthetic reference materials with homogeneous isotope compositions on a micro-scale. Herein, we report a novel method to synthesize homogeneous sulfide reference materials in the form of nano-particulate pre...
36 CitationsSource
#1Mengning Dai (Northwest University (United States))H-Index: 5
#2Zhian Bao (Northwest University (United States))H-Index: 8
Last.YUANHonglin (Northwest University (United States))H-Index: 35
view all 5 authors...
A method was developed for the rapid in situ analysis of major and trace elements and Pb isotopes in silicate glass samples that combines laser ablation quadrupole and multi-collector inductively coupled plasma mass spectrometry (LA-Q-ICP-MS/MC-ICP-MS). Major, trace elements, and Pb isotope ratio compositions were clearly affected by laser conditions. Using a laser spot size of 160 μm, a laser ablation frequency of 15 Hz, an energy density 18 J/cm2, and a 1: 9 ratio of laser ablation aerosol to ...
3 CitationsSource
#1YUANHonglin (Northwest University (United States))H-Index: 35
#2Wenting Yuan (Northwest University (United States))H-Index: 2
Last.Shaocong Lai (Northwest University (United States))H-Index: 3
view all 10 authors...
Abstract Because Pb isotopes can be used for tracing, they are widely used in many disciplines. The detection and analysis of Pb isotopes of bulk samples are usually conducted using thermal ionization mass spectrometer (TIMS) and multiple-collector inductively coupled plasma mass spectrometer (MC-ICP-MS), both of which need external reference materials with known isotopic compositions to correct for the mass discrimination effect produced during analysis. NIST NBS 981 is the most widely used ref...
5 CitationsSource
#1Mengning Dai (Northwest University (United States))H-Index: 5
#2Zhian Bao (Northwest University (United States))H-Index: 8
Last.YUANHonglin (Northwest University (United States))H-Index: 35
view all 4 authors...
Abstract A method was developed for the in situ analysis of magnesium isotopes by femtosecond laser ablation multi-collector inductively coupled plasma mass spectrometry (fsLA-MC-ICP-MS). Concentration matching experiment revealed that the Mg isotopic composition could be measured accurately when Mg concentration difference between sample and standard were in the range of 0.4–3.0. The Mg isotopic composition was affected by the femtosecond laser conditions, including laser spot size and scanning...
3 CitationsSource
#1YUANHonglin (Northwest University (United States))H-Index: 35
#2Kaiyun Chen (Northwest University (United States))H-Index: 7
Last.Cong Yin (Northwest University (United States))H-Index: 2
view all 7 authors...
Lead isotopic compositions of international silicate glasses, feldspar and copper-based samples are obtained using femtosecond laser ablation multiple collector inductively coupled plasma mass spectrometry (fLA-MC-ICPMS). Some international glass standards for the microanalysis are applied to evaluate the method reported here. The Pb isotopic composition of these NIST glasses (SRM 610, 612, 614), USGS (BHVO-2G, BCR-2G, BIR-1G and GSD-1G) and MPI-DING glasses (GOR132-G, KL2-G, T1-G, StHs60/80-G) ...
13 CitationsSource
#1YUANHonglin (Northwest University (United States))H-Index: 35
#2Shan Gao (Northwest University (United States))H-Index: 66
Last.Mengning Dai (Northwest University (United States))H-Index: 5
view all 4 authors...
Abstract In this study, we employ a sectional power-law (SPL) correction that provides accurate and precise measurements of 176 Lu/ 175 Lu ratios in geological samples using multiple collector-inductively coupled plasma-mass spectrometry (MC-ICP-MS). Three independent power laws were adopted based on the 176 Lu/ 176 Yb ratios of samples measured after chemical chromatography. Using isotope dilution (ID) techniques and the SPL correction method, the measured lutetium contents of United States Geo...
5 CitationsSource
#1YUANHonglinH-Index: 35
#2Shan GaoH-Index: 66
Last.G. H. FontaineH-Index: 5
view all 6 authors...
#1YUANHonglin (Northwest University (United States))H-Index: 35
#2Shan Gao (Northwest University (United States))H-Index: 66
Last.Chunrong Diwu (Northwest University (United States))H-Index: 12
view all 8 authors...
Abstract We describe an in situ method for simultaneous measurement of U–Pb–Hf isotopes and trace element compositions of zircons using a quadrupole and multiple-collector inductively-coupled-plasma mass spectrometer (Q-ICP-MS and MC-ICP-MS, respectively) connected to a single excimer laser-ablation system. A laser-generated zircon aerosol was split behind the ablation cell into two transport tubes via a Y-shaped connector and simultaneously introduced into the two mass spectrometers. Hafnium is...
523 CitationsSource
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