Trace Element Analysis of NIST SRM 614 and 616 Glass Reference Materials by Laser Ablation Microprobe‐Inductively Coupled Plasma‐Mass Spectrometry

Abstract

Fifty elements in NIST SRM 614 and 616 glass reference materials were determined by laser ablation microprobe‐inductively coupled plasma‐mass spectrometry (LAM‐ICP‐MS). The values determined for NIST SRM 614 agreed well with the NIST‐certified and information values (mean relative difference ± 3.6%), except for B, Sc and Sb. The values determined for NIST SRM 616 agreed with the NIST‐certified and information values within a mean relative difference of ± 1.5%, except for B, Sc and Ga. In addition, at an 80 μm sampling scale, NIST SRM 614 and 616 glass discs were homogeneous for trace elements within the observed precisions of 5 and 15% (mean), respectively. Detection limits were in the range 0.01 ‐ 0.3 μg g−1 for elements of lower mass numbers (amu < 80) and 1 ‐ 10 ng g−1 for heavy elements (amu > 80). Detection at the sub ng g−1 level is possible for most of the heavy elements by using an ablation pit size larger than 10 0 μm.

Multiple trace element analyses for silicate minerals and glasses by laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS)

“…There are sufficient records of these standards as calibration materials for LA-ICP-MS ( e.g., Jochum et al, 2011 ) , and the concentration of elements in NIST 612-613 is appropriate for analysis of common silicate minerals and glasses ( e.g., Mason, et al, 1999;Jackson, 2008 et al ( 1997 ) were adopted for external calibration with NIST 612-613 in most of the previous studies ( e.g., Horn et al, 1997;Mason et al, 1999;Kurosawa et al, 2002;Morishita et al, 2005 ) .…”

“…Measurement of a large number of elements with a long dwell time for each element results in long acquisition times with ICP-MS, which can lead to attenuation of the signal intensity due to the long laser ablation time. For recent LA-ICP-MS analyses, the time-resolved analysis ( TRA ) mode has been adopted by many institutions ( e.g., Longerich et al, 1996;Horn et al, 1997;Kurosawa et al, 2002;Morishita et al, 2005 ) . Although an advantage of the TRA mode is a reduction of the signal spike which affect the Table 1 LA-ICP-MS operating parameters.…”

“…According to analytical reports from other institutions, recent analytical protocols adopted by other institutions were laser pulse repetition rates of 5 Hz or 10 Hz ( e.g., Eggins and Shelley, 2002;Kurosawa et al, 2002;Morishita et al, 2005;Regnery et al, 2010 ) . Although both 5 Hz and 10 Hz were tested with the same conditions of He carrier gas flow rate and laser energy, there was no advantage for a laser pulse repetition rate of 10…”

“…The numbers of elements in multi-element LA-ICP-MS analysis of geologic samples are generally less than 30 elements, and division into two sets of data acquisition is often adopted for analysis with a large number of elements ( > 30 elements ) ( e.g., Horn et al, 1997;Kurosawa et al, 2002;Morishita et al, 2005 ) . Therefore, analysis of the 45 elements ( +1 internal standard element ) in this study covered a very wide range of mass numbers compared to common analytical methods used in many institutions.…”

Elemental Analysis of Desert Varnish Samples in the Vicinity of Coal-Fired Power Plants and the Nevada Test Site Using Laser Ablation ICPMS

“…These standards have been well characterized in LA-ICPMS studies and provide reliable calibrations for analysis of many geological materials [12,20]. The certified values for the SRM were used; and when that information was unavailable, consensus values were used [20,21]. Aluminum-27 was used as an internal standard (IS) for sector field ICPMS analyses.…”