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Bo G, Fang T, Chen L, Gong Z, Ma J. Shipboard determination of arsenite and total dissolved inorganic arsenic in estuarine and coastal waters with an automated on-site-applicable atomic fluorescence spectrometer. Talanta 2024; 266:125082. [PMID: 37595527 DOI: 10.1016/j.talanta.2023.125082] [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: 05/30/2023] [Revised: 08/07/2023] [Accepted: 08/14/2023] [Indexed: 08/20/2023]
Abstract
The speciation of trace level arsenic (As) in estuarine and coastal waters is crucial for both biogeochemical and toxicological studies of this toxic metalloid. However, the accurate and on-site determination of As in complex seawater matrices is challenging because of the low concentration of As, the easy conversion of arsenite (As(III)) to arsenate (As(V)), and the considerable effect of salinity on the determination of As via conventional methods. In this study, a custom-made shipboard atomic fluorescence spectrometer (AFS) is reported for the on-site speciation of inorganic As in estuarine and coastal waters. After comprehensive optimization of the instrumental and chemical parameters, the method demonstrated high sensitivity (limits of detection: 0.02 μg L-1), good linearity (R2 > 0.999 for all calibration curves up to 8 μg L-1), high precision (relative standard deviations (RSDs) of less than 2% at 1 μg L-1 over a year-long evaluation), and excellent performance for sample analysis for different matrices with varying salinities (recoveries: 96.3%-105.3%). The portable and field-applicable AFS was successfully applied to the on-site and shipboard simultaneous determination of As(III) and total dissolved inorganic arsenic (TDIAs) in the coastal waters of Shandong, Jiangsu, Zhejiang, Fujian, and Guangdong province of China, demonstrating its robustness and applicability in harsh conditions.
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Affiliation(s)
- Guangyong Bo
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, People's Republic of China; National Observation and Research Station for the Taiwan Strait Marine Ecosystem, Xiamen University, Zhangzhou, 363000, People's Republic of China
| | - Tengyue Fang
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, People's Republic of China; National Observation and Research Station for the Taiwan Strait Marine Ecosystem, Xiamen University, Zhangzhou, 363000, People's Republic of China
| | - Luodan Chen
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, People's Republic of China
| | - Zhenbin Gong
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, People's Republic of China
| | - Jian Ma
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, People's Republic of China; National Observation and Research Station for the Taiwan Strait Marine Ecosystem, Xiamen University, Zhangzhou, 363000, People's Republic of China.
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Xia C, Pu S, Hua J, Xu K. In situ formation of AuNPs in liquid bead-headspace microextraction of arsine for colorimetric sensing of trace As(III). Microchem J 2023. [DOI: 10.1016/j.microc.2023.108602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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Wang ZH, Xu DD, Bai XH, Hu S, Xing RR, Chen X. A study on the enrichment mechanism of three nitrophenol isomers in environmental water samples by charge transfer supramolecular-mediated hollow fiber liquid-phase microextraction. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:18973-18984. [PMID: 36223017 DOI: 10.1007/s11356-022-23409-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
To explore the mechanism of extraction and enrichment of three nitrophenol isomers by charge-transfer supramolecular synergistic three-phase microextraction system, a charge transfer supramolecular-mediated hollow fiber liquid-phase microextraction (CTSM-HF-LPME) combined with high-performance liquid chromatography-ultraviolet detector (HPLC-UV) method was established for the determination of real environmental water samples. In this study, the three nitrophenols (NPs) formed charge-transfer supramolecules with electron-rich hollow fibers, which promoted the transport of NPs in the three-phase extraction system and greatly increased the EFs of NPs. The relationships between the EFs of NPs and their solubility, pKa, apparent partition coefficient, equilibrium constant, and structural property parameters were investigated and discussed. At the same time, most of factors affecting the EFs of NPs were investigated and optimized, such as the type of extraction solvent, pH value of sample phase and acceptor phase, extraction time, and stirring speed. Under optimal conditions, the EFs of o-nitrophenol, m-nitrophenol, and p-nitrophenol were 163, 145, and 87, respectively. With good linearity in the range of 5 × 10-7 ~ 1 µg/mL, and the limit of detection of 0.1 pg/mL, the relative standard deviations of the method precision were lower than 7.4%, and the average recoveries were between 98.6 and 106.4%. This method had good selectivity and sensitivity, satisfactory precision, and accuracy and had been successfully applied to the trace detection of real water samples.
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Affiliation(s)
- Zhao-Hui Wang
- School of Pharmacy, Shanxi Medical University, Taiyuan, 030001, People's Republic of China
| | - Dou-Dou Xu
- School of Pharmacy, Shanxi Medical University, Taiyuan, 030001, People's Republic of China
| | - Xiao-Hong Bai
- School of Pharmacy, Shanxi Medical University, Taiyuan, 030001, People's Republic of China
| | - Shuang Hu
- School of Pharmacy, Shanxi Medical University, Taiyuan, 030001, People's Republic of China
| | - Rong-Rong Xing
- School of Pharmacy, Shanxi Medical University, Taiyuan, 030001, People's Republic of China
| | - Xuan Chen
- School of Pharmacy, Shanxi Medical University, Taiyuan, 030001, People's Republic of China.
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Skok A, Vishnikin A, Bazel Y. A new approach for sulfite determination by headspace liquid-phase microextraction with an optical probe. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:3299-3306. [PMID: 35968635 DOI: 10.1039/d2ay00943a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A new approach of headspace liquid-phase microextraction with an optical probe (HS-LPME-OP), which solves the problem of the extraction phase retention in the hole of the optical probe and provides the possibility of simpler, more precise and reliable online processing of the analytical signal, was used for sulfite determination. A 1 × 10-4 M 5,5'-dithiobis-(2-nitrobenzoic) acid (DTNB) solution was used as an acceptor phase. It was placed in a plastic vial fixed in the headspace above the analyte solution. An optical probe immersed in the acceptor phase was used to monitor the analytical signal. Sulfite determination is based on the release of sulfur dioxide from the sample after the addition of ortho-phosphoric acid, followed by its extraction with an aqueous solution of DTNB at pH 7.0. The absorbance was measured at 412 nm. The calibration graph was linear in the range from 32 to 320 μg L-1 with a detection limit of 14 μg L-1. The developed method is sensitive, highly selective and reproducible. It was successfully applied for the sulfite determination in juice, alcoholic beverages and jam.
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Affiliation(s)
- Arina Skok
- Department of Analytical Chemistry, Institute of Chemistry, Faculty of Science, University of Pavol Jozef Šafárik in Košice, Moyzesova 11, 040 01, Košice, Slovak Republic.
| | - Andriy Vishnikin
- Department of Analytical Chemistry, Oles Honchar Dnipro National University, Gagarin Avenue 72, 49010, Dnipro, Ukraine
| | - Yaroslav Bazel
- Department of Analytical Chemistry, Institute of Chemistry, Faculty of Science, University of Pavol Jozef Šafárik in Košice, Moyzesova 11, 040 01, Košice, Slovak Republic.
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Villarino N, Pena-Pereira F, Lavilla I, Bendicho C. Waterproof Cellulose-Based Substrates for In-Drop Plasmonic Colorimetric Sensing of Volatiles: Application to Acid-Labile Sulfide Determination in Waters. ACS Sens 2022; 7:839-848. [PMID: 35285629 PMCID: PMC8961881 DOI: 10.1021/acssensors.1c02585] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 03/04/2022] [Indexed: 11/28/2022]
Abstract
The present work reports on the assessment of widely available waterproof cellulose-based substrates for the development of sensitive in-drop plasmonic sensing approaches. The applicability of three inexpensive substrates, namely, Whatman 1PS, polyethylene-coated filter paper, and tracing paper, as holders for microvolumes of colloidal solutions was evaluated. Waterproof cellulose-based substrates demonstrated to be highly convenient platforms for analytical purposes, as they enabled in situ generation of volatiles and syringeless drop exposure unlike conventional single-drop microextraction approaches and can behave as sample compartments for smartphone-based colorimetric sensing in an integrated way. Remarkably, large drop volumes (≥20 μL) of colloidal solutions can be employed for enrichment processes when using Whatman 1PS as holder. In addition, the stability and potential applicability of spherical, rod-shaped, and core-shell metallic NPs onto waterproof cellulose-based substrates was evaluated. In particular, Au@AgNPs showed potential for the colorimetric detection of in situ generated H2S, I2, and Br2, whereas AuNRs hold promise for I2, Br2, and Hg0 colorimetric sensing. As a proof of concept, a smartphone-based colorimetric assay for determination of acid-labile sulfide in environmental water samples was developed with the proposed approach taking advantage of the ability of Au@AgNPs for H2S sensing. The assay showed a limit of detection of 0.46 μM and a repeatability of 4.4% (N = 8), yielding satisfactory recoveries (91-107%) when applied to the analysis of environmental waters.
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Affiliation(s)
- Nerea Villarino
- Centro de Investigación Mariña,
Universidade de Vigo, Departamento de
Química Analítica e alimentaria, Grupo QA2, Edificio CC Experimentais, Campus
de Vigo, As Lagoas, Marcosende, 36310 Vigo, Spain
| | - Francisco Pena-Pereira
- Centro de Investigación Mariña,
Universidade de Vigo, Departamento de
Química Analítica e alimentaria, Grupo QA2, Edificio CC Experimentais, Campus
de Vigo, As Lagoas, Marcosende, 36310 Vigo, Spain
| | - Isela Lavilla
- Centro de Investigación Mariña,
Universidade de Vigo, Departamento de
Química Analítica e alimentaria, Grupo QA2, Edificio CC Experimentais, Campus
de Vigo, As Lagoas, Marcosende, 36310 Vigo, Spain
| | - Carlos Bendicho
- Centro de Investigación Mariña,
Universidade de Vigo, Departamento de
Química Analítica e alimentaria, Grupo QA2, Edificio CC Experimentais, Campus
de Vigo, As Lagoas, Marcosende, 36310 Vigo, Spain
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Li G, Row KH. Single-drop microextraction technique for the determination of antibiotics in environmental water. J Sep Sci 2021; 45:883-895. [PMID: 34919334 DOI: 10.1002/jssc.202100682] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 12/03/2021] [Accepted: 12/05/2021] [Indexed: 12/12/2022]
Abstract
Growing concerns related to antibiotic residues in environmental water have encouraged the development of rapid, sensitive, and accurate analytical methods. Single-drop microextraction has been recognized as an efficient approach for the isolation and preconcentration of several analytes from a complex sample matrix. Thus, single-drop microextraction techniques are cost-effective and less harmful to the environment, subscribing to green analytical chemistry principles. Herein, an overview and the current advances in single-drop microextraction for the determination of antibiotics in environmental water are presented were included. In particular, two main approaches used to perform single-drop microextraction (direct immersion-single-drop microextraction and headspace-single-drop microextraction) are reviewed. Furthermore, the impressive analytical features and future perspectives of single-drop microextraction are discussed in this review. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Guizhen Li
- School of Chemistry and Chemical Engineering, Linyi University, Linyi, Shandong, 276005, P. R. China
| | - Kyung Ho Row
- Department of Chemistry and Chemical Engineering, Inha University, Incheon, 402751, Korea
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