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Organic Ion-Associate Phase Microextraction/Back-Microextraction for Preconcentration: Determination of Nickel in Environmental Water Using 2-Thenoyltrifluoroacetone via GF-AAS

Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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Academic Editor: Jason Love
AppliedChem 2021, 1(2), 130-141; https://doi.org/10.3390/appliedchem1020010
Received: 15 October 2021 / Revised: 19 November 2021 / Accepted: 23 November 2021 / Published: 1 December 2021
(This article belongs to the Special Issue Feature Papers in AppliedChem)
An ion-associate phase (IAP) microextraction/ back-microextraction system was applied for the enrichment, separation, and detection of trace amounts of nickel from environmental water samples. Thenoyltrifluoroacetone (HTTA) acted not only as a chelating reagent for nickel, but also as a component of the extraction phase, i.e., IAP. Nickel in a 40 mL sample solution was pH-adjusted with phenolsulfonate (PS) and tetramethylammonium hydroxide and converted by chelation reaction in the presence of thenoyltrifluoroacetonate (TTA). When benzyldodecyldimethylammonium ion (C12BzDMA+) was added, a suspension of IAP formed in the solution. The IAP consisted of TTA, a chelating reagent, the PS, a component of pH buffer, and C12BzDMA+, which helps extract the chelating complex. When the solution was centrifuged, the IAP separated from the suspension and the nickel-TTA chelate was extracted into the bottom phase of the centrifuge tube. After the aqueous phase was taken away, 100 µL of nitric acid (2 M) solution containing phosphate was used to back-microextract nickel from the IAP. The acid phase was measured via graphite-furnace atomic-absorption spectrometry (GF-AAS). The proposed method facilitated a 400-fold enrichment. The limit of detection was 0.02 µg L−1. The proposed method was applied for the determination of nickel in river water and seawater samples. View Full-Text
Keywords: ion-associate phase microextraction; back-microextraction; nickel; river water; seawater; 2-thenoyltrifluoroacetone; β-diketones; GF-AAS ion-associate phase microextraction; back-microextraction; nickel; river water; seawater; 2-thenoyltrifluoroacetone; β-diketones; GF-AAS
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MDPI and ACS Style

Kosugi, M.; Mizuna, K.; Sazawa, K.; Okazaki, T.; Kuramitz, H.; Taguchi, S.; Hata, N. Organic Ion-Associate Phase Microextraction/Back-Microextraction for Preconcentration: Determination of Nickel in Environmental Water Using 2-Thenoyltrifluoroacetone via GF-AAS. AppliedChem 2021, 1, 130-141. https://doi.org/10.3390/appliedchem1020010

AMA Style

Kosugi M, Mizuna K, Sazawa K, Okazaki T, Kuramitz H, Taguchi S, Hata N. Organic Ion-Associate Phase Microextraction/Back-Microextraction for Preconcentration: Determination of Nickel in Environmental Water Using 2-Thenoyltrifluoroacetone via GF-AAS. AppliedChem. 2021; 1(2):130-141. https://doi.org/10.3390/appliedchem1020010

Chicago/Turabian Style

Kosugi, Mitsuhito, Kenta Mizuna, Kazuto Sazawa, Takuya Okazaki, Hideki Kuramitz, Shigeru Taguchi, and Noriko Hata. 2021. "Organic Ion-Associate Phase Microextraction/Back-Microextraction for Preconcentration: Determination of Nickel in Environmental Water Using 2-Thenoyltrifluoroacetone via GF-AAS" AppliedChem 1, no. 2: 130-141. https://doi.org/10.3390/appliedchem1020010

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