Determination of refractive and volatile elements in sediment using laser ablation inductively coupled plasma mass spectrometry

Duodu, Godfred Odame, Goonetilleke, Ashantha, Allen, Charlotte, & Ayoko, Godwin A. (2015) Determination of refractive and volatile elements in sediment using laser ablation inductively coupled plasma mass spectrometry. Analytica Chimica Acta, 898, pp. 19-27.

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Abstract

Wet-milling protocol was employed to produce pressed powder tablets with excellent cohesion and homogeneity suitable for laser ablation (LA) analysis of volatile and refractive elements in sediment. The influence of sample preparation on analytical performance was also investigated, including sample homogeneity, accuracy and limit of detection. Milling in volatile solvent for 40 min ensured sample is well mixed and could reasonably recover both volatile (Hg) and refractive (Zr) elements. With the exception of Cr (−52%) and Nb (+26%) major, minor and trace elements in STSD-1 and MESS-3 could be analysed within ±20% of the certified values. Comparison of the method with total digestion method using HF was tested by analysing 10 different sediment samples. The laser method recovers significantly higher amounts of analytes such as Ag, Cd, Sn and Sn than the total digestion method making it a more robust method for elements across the periodic table. LA-ICP-MS also eliminates the interferences from chemical reagents as well as the health and safety risks associated with digestion processes. Therefore, it can be considered as an enhanced method for the analysis of heterogeneous matrices such as river sediments.

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ID Code: 89779
Item Type: Journal Article
Refereed: Yes
Keywords: River sediment analysis, Hydrogen fluoride digestion, Laser ablation, Sample preparation, Elemental analysis
DOI: 10.1016/j.aca.2015.09.033
ISSN: 0003-2670
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ANALYTICAL CHEMISTRY (030100) > Analytical Spectrometry (030101)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Schools > School of Civil Engineering & Built Environment
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Elsevier
Copyright Statement: Licensed under the Creative Commons Attribution; Non-Commercial; No-Derivatives 4.0 International. DOI:
Deposited On: 03 Nov 2015 22:45
Last Modified: 08 Nov 2015 08:31

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