Assessment of Extraction Methods of Trace Metallic Elements in Plants: Approval of a Common Method

Noomene Sleimi, Insaf Bankaji, Rim Kouki, Nesrine Dridi, Bernardo Duarte and Isabel Caçador
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Noomene Sleimi: RME-Laboratory of Resources, Materials, and Ecosystems, Faculty of Sciences of Bizerte, University of Carthage, Bizerte 7021, Tunisia
Insaf Bankaji: RME-Laboratory of Resources, Materials, and Ecosystems, Faculty of Sciences of Bizerte, University of Carthage, Bizerte 7021, Tunisia
Rim Kouki: RME-Laboratory of Resources, Materials, and Ecosystems, Faculty of Sciences of Bizerte, University of Carthage, Bizerte 7021, Tunisia
Nesrine Dridi: RME-Laboratory of Resources, Materials, and Ecosystems, Faculty of Sciences of Bizerte, University of Carthage, Bizerte 7021, Tunisia
Bernardo Duarte: MARE-Marine and Environmental Sciences Centre, Faculty of Sciences of University of Lisbon, Campo Grande, 1749-016 Lisboa, Portugal
Isabel Caçador: MARE-Marine and Environmental Sciences Centre, Faculty of Sciences of University of Lisbon, Campo Grande, 1749-016 Lisboa, Portugal

Sustainability, 2022, vol. 14, issue 3, 1-13

Abstract: The question of trace metal elements (TME) is still relevant and causes several environmental problems. Moreover, the digestion methods of TME have a significant impact on ecosystems. Sample preparation is an important step of any analytical procedure. In fact, defining the levels of TME in vegetal tissues requires various steps: drying samples, crushing, extraction, and dosage. The use of chemical extraction solutions can be put into question. Other than their lack of specificity, they are susceptible to provoking the redistribution and/or re-fixation of a part of the metallic ions between the various vegetal components. Our study aims to test the procedures of extraction that are specific for the metals Cu, Zn, Fe, Ca, Cr and Ba. Our results show an outstanding difference in the levels of TME derived from the same vegetal sample, according to the various techniques of extraction. In fact, cold extraction by nitric acid diluted at 10% is the most efficient way to put the ions of Cu, Zn, Fe and Ca into a solution. Meanwhile, the use of heated extraction using different acid digestion approaches is the most efficient for Cr and Ba solubilization from Atriplex portulacoides , Arthrocnemum indicum , Olea europaea BCR-62, Ulva lactuca and Ulva lactuca BCR-279.

Keywords: trace metal elements; vegetal tissues; acid digestion; % extractability (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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