Developing on-site trace Level speciation of lead, cadmium and zinc by stripping chronopotentiometry (SCP): Fast screening and Quantification of total metal concentrations
| Autor: | Aoife Morrin, Elise Rotureau, José Paulo Pinheiro, Laetitia Hackel |
|---|---|
| Přispěvatelé: | Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Terre et Environnement de Lorraine (OTELo), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Insight Centre for Data Analytics [Dublin], Dublin City University [Dublin] (DCU) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Stripping (chemistry)
cadmium Analytical chemistry Pharmaceutical Science chemistry.chemical_element Zinc 010402 general chemistry Electrochemistry 01 natural sciences Article Analytical Chemistry QD241-441 stripping chronopotentiometry (SCP) [CHIM.ANAL]Chemical Sciences/Analytical chemistry Drug Discovery thin mercury film electrodes (TMFE) Physical and Theoretical Chemistry [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Inductively coupled plasma mass spectrometry standard addition method screen printed electrodes Detection limit Cadmium lead 010401 analytical chemistry Organic Chemistry zinc 0104 chemical sciences Mercury (element) chemistry Chemistry (miscellaneous) Standard addition Molecular Medicine |
| Zdroj: | Hackel, Laetitia ORCID: 0000-0002-8679-8767 Molecules 2021 Molecules Molecules, MDPI, 2021, 26 (18), pp.5502. ⟨10.3390/molecules26185502⟩ Molecules, Vol 26, Iss 5502, p 5502 (2021) Volume 26 Issue 18 |
| ISSN: | 1420-3049 |
| DOI: | 10.3390/molecules26185502⟩ |
| Popis: | International audience; Electrochemical stripping techniques are interesting candidates for carrying out onsite speciation of environmentally relevant trace metals due to the existing low-cost portable instrumentation available and the low detection limits that can be achieved. In this work, we describe the initial analytical technique method development by quantifying the total metal concentrations using Stripping Chronopotentiometry (SCP). Carbon paste screen-printed electrodes were modified with thin films of mercury and used to quantify sub-nanomolar concentrations of lead and cadmium and sub-micromolar concentrations of zinc in river water. Low detection limits of 0.06 nM for Pb(II) and 0.04 nM for Cd(II) were obtained by the standard addition method using a SCP deposition time of 180 s. The SCP results obtained for Pb(II) and Cd(II) agreed with those of inductively coupled plasma mass spectrometry (ICP-MS). The coupling of SCP with screen-printed electrodes opens up excellent potential for the development of onsite speciation of trace metals. Due to the low analysis throughput obtained for the standard addition method, we also propose a new, more rapid screening Cd(II) internal standard methodology to significantly increase the number of samples that can be analyzed per day. |
| Databáze: | OpenAIRE |
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