Direct analysis of tree rings using laser ablation-ICP-MS and quantitative evaluation of Zn and Cu using filter paper as a solid support for calibration

Author(s)

Moreau, Pedro dos Santos ; Zezzi Arruda, Marco Aurelio

• Document type: Journal article
• Source: Journal of Analytical Atomic Spectrometry; v. 37, n. 4, p. 10-pg., 2022-02-15.

Abstract

This work demonstrated a quantitative determination of Cu and Zn in tree rings using laser ablation-ICP-MS and the use of quantitative filter paper as a solid support for constructing the calibration curve using aqueous standards. After cleaning the filter paper using 10% v/v HNO3 for 30 min and drying it, 4 mu L of standards is delivered on the filter surface and the results are attained with no normalized data. The analytical curves ranged from 0.5 to 10.0 mu g g(-1) and 5.0 to 100.0 mu g g(-1) for Cu and Zn, respectively, and the accuracy of the results was checked not only through Certified Reference Materials (NIST 1573a, tomato leaves and 1575a, pine needles) but also using ICP-MS (Inductively Coupled Plasma Mass Spectrometry) as a reference technique. Then, using such minimalist strategies, this method was applied for evaluating the mass fractions of Zn and Cu directly in tree rings. Three parallel ablation lines were drawn with a 220 mu m distance between each one, with the same size of the tree ring samples. The average mass fractions for each tree ring and between the 3 ablated lines were at most ca. 18 and 13 mu g g(-1) for Cu and Zn, respectively, in Hymenaea courbaril, ca. 4 and 9 mu g g(-1) for Cu and Zn, respectively, in Tipuana tipu, and ca. 160 mu g g(-1) and <LQ for Zn and Cu, respectively, in Cavanillesia arborea. (AU)

• FAPESP's process: 19/00018-3 - Study of inert supports as solid matrix for the quantification of Zn and Cu in tree rings and speleothems using LA-ICP-MS
• Grantee: Pedro dos Santos Moreau
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 18/25207-0 - Nanometallomics applied to soybean cultivation for studying the effects of metal-related nanoparticles
• Grantee: Marco Aurelio Zezzi Arruda
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 14/50867-3 - INCT 2014: National Institute of Science and Technology in Bioanalysis
• Grantee: Marco Aurelio Zezzi Arruda
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/50085-3 - PIRE: climate research education in the Americas using tree-ring speleothem examples (PIRE-CREATE)
• Grantee: Francisco William da Cruz Junior
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 19/24445-8 - EMU granted in process 2018/25207-0: inductively coupled plasma mass spectrometer
• Grantee: Marco Aurelio Zezzi Arruda
• Support Opportunities: Multi-user Equipment Program