High Sensitivity Analysis of Trace Element‐Poor Geological Reference Glasses by Laser Ablation‐Inductively Coupled Plasma‐Mass Spectrometry (LA‐ICP‐MS)

Abstract

Fifty‐two trace elements in NIST SRM 614, 616 and MPI‐DING BM90/21‐G glass reference materials as well as in NIST SRM 612, USGS BCR2‐G and other MPI‐DING reference glasses (KL2‐G, GOR132‐G, GOR128‐G, ATHO‐G, Tl‐G, StHs6/80‐G and ML3B‐G) were determined by laser ablation‐inductively coupled plasma‐mass spectrometry (LA‐ICP‐MS). Accurate ultra‐low trace element abundances in the NIST SRM 614, 616 and BM90/21‐G reference glasses down to lower ng g−1 levels were determined with relative standard deviations (RSD) of less than 10%. Limits of detection using He as carrier gas were up to two times lower than with Ar and were 0.004 to 0.12 μg g−1 for elements of lower mass numbers (amu < 85) and 0.002 to 0.06 μg g−1 for elements having amu < 85. The measured concentrations generally agree within 15% with previous studies except for B in NIST SRM 614 and 616, which appears to be heterogeneously distributed, and Co, Zn, Ga and Ag in NIST SRM 616 for which the existing data set is too small to evaluate the discrepancies. New values for As (0.593 μg g−1), Ag (0.361 μg g−1) and Cd (0.566 μg g−1) in NIST SRM 614 and new values for Na (94864 μg g−1) and As (0.276 μg g−1) in NIST SRM 616 are reported.

Evidence from Antarctic mantle peridotite xenoliths for changes in mineralogy, geochemistry and geothermal gradients beneath a developing rift

“…Fewer analyses of clinopyroxenes were made; these are also presented in Table 7. These also show differences between the low-Ca and high-Ca sample groups noted above, but do not follow the same depletion and enrichment trends as for olivine and orthopyroxene: Sc ( Pearce et al (1997), whereas those for BCR-2 are as compiled by Jacob (2006). …”

“…Additional standard glasses (BCR-2) were analysed as unknowns to monitor possible instrumental drift. Representative results and values obtained for standard glasses with the same analytical set-up (Jacob, 2006) are given in Table 7. These are in all cases within 15% of the accepted values, and 59% of standard measurements are within 5%.…”

“…Also, many trace elements normally analysed in clinopyroxenes and amphiboles (e.g., REE, Rb, Ba; Zack et al, 1997;Bottazzi et al, 1999;Marks et al, 2004) were neglected as they were expected to be near or below detection limits in olivine and orthopyroxene, which were the main objects of study here. Trace elements were analysed with an Agilent 7500cs ICP-MS coupled to a New Wave 213 nm Laser at the University of Greifswald (Jacob, 2006) using NIST SRM 612 glasses as external standards and microprobe analyses on the same minerals as internal standards. Additional standard glasses (BCR-2) were analysed as unknowns to monitor possible instrumental drift.…”

Subduction-related origin of eclogite xenoliths from the Wajrakarur kimberlite field, Eastern Dharwar craton, Southern India: Constraints from petrology and geochemistry

“…The elemental maps were collected at 20 kV and 30 nA and a beam diameter of 5 lm (step size 5 lm). Trace elements in garnet, clinopyroxene, kyanite and rutile were analyzed in situ by Laser Ablation ICP-MS with an Agilent 7500ce quadrupole ICP-MS coupled with an esi/NWR193 nm wavelength excimer laser following methods described in Jacob (2006). Ablation was carried out at 6.6 J/cm 2 and 10 Hz, using He as the carrier gas.…”

Effect of organic matrices on the determination of the trace element chemistry (Mg, Sr, Mg/Ca, Sr/Ca) of aragonitic bivalve shells (<i>Arctica islandica</i>)&mdash;Comparison of ICP-OES and LA-ICP-MS data

“…Ablation was achieved with a NewWave Research UP-213 Nd:YAG laser ablation system (New Wave Research), using a pulse rate of 4-10 Hz, a pulse energy of ~0.3 mJ per spot, and 50 and 100 µm spot diameters with Ar (or a He/Ar mixture) as ablation gas. Analyses were performed on an Agilent 7500ce ICP-MS coupled to the UP-213 platform (one point per peak and 10 ms dwell time) following methods described in Jacob (2006). SRM NIST SRM 612 was used as the external standard (Pearce et al, 1997), and the U.S. Geological Survey glass standard BCR-2G was measured to monitor accuracy and instrumental drift.…”