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Kohama N, Okazaki T, Sazawa K, Hata N, Kuramitz H, Taguchi S. Simple solid-phase colorimetry for trace Cr(VI) by combination of complexation with diphenylcarbazide and ion-pair solid-phase extraction with sedimentable dispersed particulates. ANAL SCI 2023; 39:857-865. [PMID: 36795319 DOI: 10.1007/s44211-023-00286-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 02/01/2023] [Indexed: 02/17/2023]
Abstract
A highly sensitive and simple solid-phase colorimetry for Cr(VI) was proposed. It was based on the ion-pair solid-phase extraction of Cr-diphenylcarbazide (DPC) complex with sedimentable dispersed particulates. The concentration of Cr(VI) was measured from the color tones obtained by image analysis of the photo of sediment. Various conditions, e.g., material and amounts of adsorbent particulates, chemical properties and concentration of counter ions, and pH, were optimized for the formation and quantitative extraction of the complex. In the recommended procedure, 1 mL of sample was put into a 1.5 mL microtube where powder form adsorbent and reagents, i.e., XAD-7HP particles, DPC, sodium dodecyl sulfate, amido sulfuric acid, and sodium chloride had been packed. The analytical operation was completed within 5 min by gently shaking the microtube and allowing it to stand until enough amounts of particulates were deposited to take a picture. Chromium (VI) up to 2.0 ppm was determined, and the detection limit was 0.0034 ppm. The sensitivity was enough to determine Cr(VI) at lower concentrations than the water quality of standard (0.02 ppm). This method was successfully applied to the analysis of simulated industrial wastewater samples. The stoichiometry of the extracted chemical species was also investigated by applying the same equilibrium model as the ion-pair solvent extraction.
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Affiliation(s)
- Nozomi Kohama
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama, Gofuku 3190, Toyama, 930-8555, Japan
| | - Takuya Okazaki
- Department of Applied Chemistry, School of Science and Technology, Meiji University, Kawasaki, Kanagawa, 214-8571, Japan
| | - Kazuto Sazawa
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama, Gofuku 3190, Toyama, 930-8555, Japan
| | - Noriko Hata
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama, Gofuku 3190, Toyama, 930-8555, Japan
| | - Hideki Kuramitz
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama, Gofuku 3190, Toyama, 930-8555, Japan.
| | - Shigeru Taguchi
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama, Gofuku 3190, Toyama, 930-8555, Japan
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KATO T, MANAKA A, ANDO R, OSHITE S, YAMAGUCHI H, IGARASHI S. Performance Evaluation of a Portable Quantitative Analysis Method Combined with Liquid–liquid Extraction and Smartphone. BUNSEKI KAGAKU 2021. [DOI: 10.2116/bunsekikagaku.70.469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Takeshi KATO
- Materials Analysis Station, National Institute for Materials Science
| | - Atsushi MANAKA
- Department of Applied Chemistry and Chemical Engineering, National Institute of Technology, Toyama College
| | - Ryo ANDO
- Industrial Technology Innovation Center of Ibaraki Prefecture
| | - Shigekatu OSHITE
- Department of Applied Chemistry and Biochemistry, National Institute of Technology, Fukushima College
| | - Hitoshi YAMAGUCHI
- Materials Analysis Station, National Institute for Materials Science
| | - Shukuro IGARASHI
- Department of Materials Science and Engineering, College of Engineering, Ibaraki University
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Affiliation(s)
- Akiko Hokura
- Department of Applied Chemistry, School of Engineering, Tokyo Denki University, 5 Senju-Asahi-cho Adachi, Tokyo, 120-8551, Japan.
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Needle hub in-syringe solid phase extraction based a novel functionalized biopolyamide for simultaneous green separation/preconcentration and determination of cobalt, nickel, and chromium (III) in food and environmental samples with micro sampling flame atomic absorption spectrometry. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104340] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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