Journal
ANALYTICAL LETTERS
Volume 55, Issue 3, Pages 505-515Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00032719.2021.1945616
Keywords
Inductively coupled plasma-optical emission spectrometry (ICP OES); inorganic samples; microwave-assisted digestion; partial digestion; sample preparation
Categories
Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [147727/2018-9, 141634/2017-0, 305201/2018-2, 428558/2018-6]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES/PNPD-Graduate Program in Chemistry, Federal University of Sao Carlos)
- Instituto Nacional de Ciencias e Tecnologias Analiticas Avancadas-CNPq [573894/2008-6]
- FAPESP [2014/50951-4]
Ask authors/readers for more resources
This study explores the use of microwave-assisted sample preparation combined with inductively coupled plasma-optical emission spectrometry to determine the content of various inorganic elements. It was found that using diluted nitric acid solutions instead of HF for quantitative analysis of zinc oxide, kaolin, zinc residue, and zinc sulfide is feasible, but tailored procedures need to be considered.
This study discusses the application of microwave-assisted sample preparation for inorganic samples using concentrated or diluted HNO3 solutions followed by determination of Al, Ca, Cu, Cr, Fe, K, Mg, Mn, Na, Ni, P, Pb, S, Si, and Zn using inductively coupled plasma-optical emission spectrometry (ICP OES). Aiming the total digestion (reference procedure), samples were decomposed in a heating block using a mixture of 2 mL of 40% v v(-1) HF and 5 mL of 14 mol L-1 HNO3. Four digestion mixtures composed by (1) 14, (2) 7.0, (3) 4.0, and (4) 2.0 mol L-1 HNO3 plus 3 mL of concentrated H2O2 were evaluated as alternatives for microwave-assisted digestion of six inorganic samples (partial digestion). Considering all evaluated procedures, quantitative recoveries were obtained applying reference and partial digestion procedures. Therefore, the use of HNO3 dilute solutions as an alternative for HF is a feasible procedure for quantitative analysis of zinc oxide, kaolin, zinc residue, and zinc sulfide. However, tailored procedures must be taken into consideration, since quantitative determination depends on digestion mixture, sample matrix, and analytes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available