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Major and Trace Element Analysis of Silicate Rocks by XRF and Laser Ablation ICP-MS Using Lithium Borate Fused Glasses: Matrix Effects, Instrument Response and Results for International Reference Materials

Citation

Yu, Z and Norman, MD and Robinson, P, Major and Trace Element Analysis of Silicate Rocks by XRF and Laser Ablation ICP-MS Using Lithium Borate Fused Glasses: Matrix Effects, Instrument Response and Results for International Reference Materials, Geostandards Newsletter-the Journal of Geostandards and Geoanalysis, 27, (1) pp. 67-89. ISSN 0150-5505 (2003) [Refereed Article]

DOI: doi:10.1111/j.1751-908X.2003.tb00713.x

Abstract

Major and trace element compositions of fifteen silicate rock reference materials have been determined by a combined XRF and laser ablation ICP-MS (LA-ICP-MS) technique on glasses prepared by fusing the sample with a lithium borate flux (sample:flux = 1:3). Advantages of this technique include the ability to measure major and trace element abundances on a single sample using a quick and simple preparation that attacks resistant phases such as zircon without the need for acid dissolution. The method is suitable for a wide variety of bulk compositions including mafic, intermediate and silicic rocks. Abundance-normalized mass response patterns (the ratio of signal intensity to element concentration) of the LA-ICP-MS analyses vary systematically with major element composition, demonstrating the presence of a matrix effect that cannot be compensated by normalisation to a single internal standard element. Increasing the sampling distance between the ICP-MS cone and the torch reduces the magnitude of this effect, suggesting that a mechanism related to residence time of ablated particles in the plasma may be at least partially responsible for the observed variations in mass response patterns. When using a matrix-matched calibration, agreement of the LA-ICP-MS results with published reference values or those obtained by solution ICP-MS is ≤ 10% relative. Analytical precision based on replicate analyses is typically ≤ 5% RSD. Procedural detection limits that include contributions from gas background and flux are 0.01-0.1 μg g -1 for the heavy mass trace elements (Rb-U). Major element analyses by XRF show excellent agreement with results obtained using a conventional heavy element absorbing flux. High quality major and trace element data for silicate rocks can be achieved by a combined XRF and LA-ICP-MS analysis of Li 2B 4O 7/LiBO 2 fused glasses provided an appropriate matrix-matched calibration is adopted.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Inorganic Geochemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Yu, Z (Mr Zongshou Yu)
Author:Norman, MD (Dr Marc Norman)
Author:Robinson, P (Mr Philip Robinson)
ID Code:28048
Year Published:2003
Web of Science® Times Cited:38
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2003-08-01
Last Modified:2004-03-19
Downloads:0

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