1
|
Jiao H, Bi R, Li F, Chao J, Zhang G, Zhai L, Hu L, Wang Z, Dai C, Li B. Rapid, easy and catalyst-free preparation of magnetic thiourea-based covalent organic frameworks at room temperature for enrichment and speciation of mercury with HPLC-ICP-MS. J Chromatogr A 2024; 1717:464683. [PMID: 38295741 DOI: 10.1016/j.chroma.2024.464683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/14/2024] [Accepted: 01/25/2024] [Indexed: 02/23/2024]
Abstract
The complex and cumbersome preparation of magnetic covalent organic frameworks (COFs) nanocomposites on a small scale limits their application. Herein, a rapid and easy route was employed for the preparation of magnetic thiourea-based COFs nanocomposites. COFs were coated on Fe3O4 nanoparticles at room temperature without a catalyst within approximately 30 min. This method is suitable for the large-scale preparation of magnetic adsorbent. Using the as-prepared magnetic adsorbent (Fe3O4@COF-TpTU), we developed a simple, efficient, and sensitive magnetic solid-phase extraction-high performance liquid chromatography-inductively coupled plasma-mass spectrometry (MSPE-HPLC-ICP-MS) for the enrichment and determination of mercury species, including Hg2+, methylmercury (MeHg), and ethylmercury (EtHg). The effects of the experimental parameters on the extraction efficiency, including solution pH, adsorption and desorption time, composition and volume of the elution solvent, salinity, coexisting ions, and dissolved organic matter, were comprehensively investigated. Under optimised conditions, the limits of detection in the developed method were 0.56, 0.34, and 0.47 ng L-1 with enrichment factors of 190, 195, and 180-fold for Hg2+, MeHg, and EtHg, respectively. The satisfactory spiked recoveries (97.0-103%) in real water samples and high consistency between the certified and determined values in a certified reference material demonstrate the high accuracy and reproducibility of the developed method. The as-proposed method with simple operation, high sensitivity, and excellent anti-matrix interference performance was successfully applied to the enrichment and determination of trace levels of mercury species in the natural samples with complicated matrices, such as underground water, surface water, seawater and biological samples.
Collapse
Affiliation(s)
- Heping Jiao
- Shandong Analysis and Tester Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Ruixiang Bi
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Fangli Li
- Shandong Public Health Clinic Center, Jinan 266075, China
| | - Jingbo Chao
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China
| | - Guimin Zhang
- National Engineering and Technology Research Centre of Chirality Pharmaceutical, Lunan Pharmaceutical Group Co., Ltd., Linyi 276005, China
| | - Lihai Zhai
- National Engineering and Technology Research Centre of Chirality Pharmaceutical, Lunan Pharmaceutical Group Co., Ltd., Linyi 276005, China
| | - Ligang Hu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhenhua Wang
- Shandong Analysis and Tester Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
| | - Caifeng Dai
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Jinan, Shandong 250012, China.
| | - Bing Li
- Shandong Analysis and Tester Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China; Shandong Key Laboratory for Adhesive Materials, Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
| |
Collapse
|
2
|
Krebs F, Zagst H, Stein M, Ratih R, Minkner R, Olabi M, Hartung S, Scheller C, Lapizco-Encinas BH, Sänger-van de Griend C, García CD, Wätzig H. Strategies for capillary electrophoresis: Method development and validation for pharmaceutical and biological applications-Updated and completely revised edition. Electrophoresis 2023; 44:1279-1341. [PMID: 37537327 DOI: 10.1002/elps.202300158] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 07/19/2023] [Indexed: 08/05/2023]
Abstract
This review is in support of the development of selective, precise, fast, and validated capillary electrophoresis (CE) methods. It follows up a similar article from 1998, Wätzig H, Degenhardt M, Kunkel A. "Strategies for capillary electrophoresis: method development and validation for pharmaceutical and biological applications," pointing out which fundamentals are still valid and at the same time showing the enormous achievements in the last 25 years. The structures of both reviews are widely similar, in order to facilitate their simultaneous use. Focusing on pharmaceutical and biological applications, the successful use of CE is now demonstrated by more than 600 carefully selected references. Many of those are recent reviews; therefore, a significant overview about the field is provided. There are extra sections about sample pretreatment related to CE and microchip CE, and a completely revised section about method development for protein analytes and biomolecules in general. The general strategies for method development are summed up with regard to selectivity, efficiency, precision, analysis time, limit of detection, sample pretreatment requirements, and validation.
Collapse
Affiliation(s)
- Finja Krebs
- Institute, of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Lower Saxony, Germany
| | - Holger Zagst
- Institute, of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Lower Saxony, Germany
| | - Matthias Stein
- Institute, of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Lower Saxony, Germany
| | - Ratih Ratih
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Surabaya, Surabaya, East Java, Indonesia
| | - Robert Minkner
- Institute, of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Lower Saxony, Germany
| | - Mais Olabi
- Institute, of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Lower Saxony, Germany
| | - Sophie Hartung
- Institute, of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Lower Saxony, Germany
| | - Christin Scheller
- Institute, of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Lower Saxony, Germany
| | - Blanca H Lapizco-Encinas
- Department of Biomedical Engineering, Kate Gleason College of Engineering, Rochester Institute of Technology, Rochester, New York, USA
| | - Cari Sänger-van de Griend
- Kantisto BV, Baarn, The Netherlands
- Department of Medicinal Chemistry, Faculty of Pharmacy, Uppsala Universitet, Uppsala, Sweden
| | - Carlos D García
- Department of Chemistry, Clemson University, Clemson, South Carolina, USA
| | - Hermann Wätzig
- Institute, of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Lower Saxony, Germany
| |
Collapse
|
3
|
Zhao YY, Zhou Y, Li R, Li B. Synthesis, Characterization and Efficient Detection of Antibiotics of Two CdII-Based Coordination Polymers. J CLUST SCI 2023. [DOI: 10.1007/s10876-023-02424-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
|
4
|
Simultaneously speciation of mercury in water, human blood and food samples based on pyrrolic and pyridinic nitrogen doped porous graphene nanostructure. Food Chem 2023; 403:134394. [DOI: 10.1016/j.foodchem.2022.134394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 09/18/2022] [Accepted: 09/21/2022] [Indexed: 11/16/2022]
|
5
|
An ultra sensitive and rapid SERS detection method based on vortex aggregation enhancement effect for anti-infective drug residues detection in water. Anal Chim Acta 2022; 1235:340539. [DOI: 10.1016/j.aca.2022.340539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/21/2022] [Accepted: 10/20/2022] [Indexed: 11/22/2022]
|
6
|
KITAGAWA F, SOMA Y. Recent Applications of Dynamic On-Line Sample Preconcentration Techniques in Capillary Electrophoresis. CHROMATOGRAPHY 2022. [DOI: 10.15583/jpchrom.2022.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Fumihiko KITAGAWA
- Department of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University
| | - Yuta SOMA
- Department of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University
| |
Collapse
|
7
|
Chen D, Lu L, Zhang H, Lu B, Feng J, Zeng D. Sensitive Mercury Speciation Analysis in Water by High-Performance Liquid Chromatography-Atomic Fluorescence Spectrometry Coupling with Solid-Phase Extraction. ANAL SCI 2021; 37:1235-1240. [PMID: 33518585 DOI: 10.2116/analsci.20p398] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
An efficient method based on high-performance liquid chromatography coupled with atomic fluorescence spectrometry (HPLC-AFS) was successfully developed for the simultaneous determination of four mercury species including Hg2+, methylmercury (MeHg), ethylmercury (EtHg), and phenylmercury (PhHg) in water. Samples were enriched and cleaned up with a solid-phase extraction (SPE) pretreatment using a thiol cartridge. Some key parameters including the selection of a SPE cartridge, eluent type, eluent volume, and interference factors were systematically investigated. Chromatographic separation was achieved on a C18 column using a mobile phase consisting of methanol and 60 mmol L-1 ammonium acetate with 10 mmol L-1 L-cysteine by gradient elution. Under the optimized conditions, good linearity (r ≥ 0.9991) was observed between 0.20 to 10.0 μg L-1. The limits of detection were in the range of 0.001 - 0.002 μg L-1. High recoveries (87.2 to 111%) and good reproducibility (1.1 - 6.5%) were obtained. Such a method is sensitive, selective and accurate, which can be applied to the quantification of mercury species in water samples.
Collapse
Affiliation(s)
- Dongyang Chen
- Hunan Provincial Center for Disease Control and Prevention
| | - Lan Lu
- Hunan Provincial Center for Disease Control and Prevention
| | - Hao Zhang
- Hunan Provincial Center for Disease Control and Prevention
| | - Bing Lu
- Hunan Provincial Center for Disease Control and Prevention
| | - Jiali Feng
- Hunan Provincial Center for Disease Control and Prevention
| | - Dong Zeng
- Hunan Provincial Center for Disease Control and Prevention
| |
Collapse
|
8
|
Wang Y, Li M, Hu F, Wang Y. Online preconcentration of lysozyme in hen egg white using responsive polymer coating in CE. J Sep Sci 2021; 44:3477-3488. [PMID: 34255416 DOI: 10.1002/jssc.202100246] [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: 03/24/2021] [Revised: 07/08/2021] [Accepted: 07/09/2021] [Indexed: 01/05/2023]
Abstract
A mixed polymer brushes material based on poly (2-methyl-2-oxazoline)- and poly (acrylic acid)-coated capillary with switchable protein adsorption/desorption properties was applied for online preconcentration of lysozyme in hen egg white during capillary electrophoresis performance. First, lysozyme in simulated egg white was successfully online preconcentrated and the detection signal of lysozyme was amplified. Ovalbumin, ovomucoid, and conalbumin in egg white were verified show negligible interference on the online preconcentration of lysozyme according to the study on electroosmotic flow mobility. Second, a series validation procedure was carried out to evaluate the proposed method performance. There was a good linearity behavior range from 0.1 to 5.0 ng/mL, limit of detection was 20 pg/mL, and limit of quantity was 50 pg/mL, the accuracy and robustness of this method were also excellent. Last, the proposed method has been successfully used to detect and analyze lysozyme in hen egg white, the determined amounts of lysozyme in hen egg white were consistent with reported normal levels and recoveries were in the range of 96.0-99.2%. After 75 consecutive runs, this prepared capillary was still stable for online preconcentration and determination of lysozyme in hen egg white without being affected by complex matrix.
Collapse
Affiliation(s)
- Yuchen Wang
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, P. R. China
| | - Mengqin Li
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, P. R. China
| | - Fei Hu
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, P. R. China
| | - Yanmei Wang
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, P. R. China
| |
Collapse
|
9
|
Xie M, Hao X, Jiang X, Liu W, Liu T, Zheng H, Wang M. Ultrasound-assisted dual-cloud point extraction with high-performance liquid chromatography-hydride generation atomic fluorescence spectrometry for mercury speciation analysis in environmental water and soil samples. J Sep Sci 2021; 44:2457-2464. [PMID: 33857354 DOI: 10.1002/jssc.202100088] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 04/09/2021] [Accepted: 04/12/2021] [Indexed: 11/10/2022]
Abstract
A method for simultaneous preconcentration and determination of mercury species in water and soil samples was established using high-performance liquid chromatography with hydride generation atomic fluorescence spectrometry after ultrasound-assisted dual-cloud point extraction. The extraction process was divided into two steps. In the first cloud point extraction, inorganic mercury and methylmercury formed chelates with sodium diethyldithiocarbamate and were extracted into Triton X-114 micelles. In the second stage, a displacement reaction between sodium diethyldithiocarbamate-inorganic mercury/methylmercury and l-cysteine occurred, and the analytes entered the l-cysteine aqueous solution under ultrasonication. This aqueous solution was directly introduced to the high-performance liquid chromatography with hydride generation atomic fluorescence spectrometry and the detection was completed within 6 min. Under the optimum experimental conditions, the linear range was 0.10-5.0 μg/L (r ≥0.9993) for inorganic mercury and methylmercury, and the enhancement factors were 15.7 for inorganic mercury and 6.35 for methylmercury. The limits of detection for inorganic mercury and methylmercury were 0.004 and 0.016 μg/L, respectively. The approach was successfully applied to the determination of trace inorganic mercury and methylmercury in water and soil samples with good recoveries (85.3-110%). This method solved the problem of peak fusion of the two analytes and was successfully applied to the speciation analysis of mercury.
Collapse
Affiliation(s)
- Meiyi Xie
- School of Public Health, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Xiaotang Hao
- School of Public Health, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Xun Jiang
- School of Public Health, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Weiting Liu
- School of Public Health, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Tiantian Liu
- School of Public Health, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Han Zheng
- School of Public Health, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Mei Wang
- School of Public Health, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| |
Collapse
|
10
|
Analytical methods for mercury speciation, detection, and measurement in water, oil, and gas. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.116016] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
11
|
Liu C, Li J, Zhu L, Lian L, Jiang L, Li H, Yan J, Chu C. A sensitive two-step stacking by coupling field-enhanced sample injection and micelle to cyclodextrin stacking for the determination of neutral analytes. J Chromatogr A 2020; 1618:460854. [DOI: 10.1016/j.chroma.2020.460854] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/03/2020] [Accepted: 01/03/2020] [Indexed: 12/18/2022]
|
12
|
Simultaneous determination of five metal ions by on-line complexion combined with micelle to solvent stacking in capillary electrophoresis. Talanta 2020; 209:120578. [PMID: 31892076 DOI: 10.1016/j.talanta.2019.120578] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 11/18/2019] [Accepted: 11/19/2019] [Indexed: 11/24/2022]
Abstract
A direct on-line complexion combined with micelle to solvent stacking method was proposed for simultaneous determination of metal ions by capillary electrophoresis coupled diode array detector. During the experiment, a plug of complexing agent was first injected to the inlet of capillary, followed by introducing the micelle-bound metal ions. Then the metal ions produced a micelle-to-solvent stacking effect and interacted with the complexing agent under a positive voltage. Continued application of voltage, the analytes were effectively focused and separated in the capillary zone electrophoresis. Repeatability was ranged from 1.89% to 1.94% for the migration time. The detection limits were 2.66-27.9 ng mL-1 for Ni2+, Co2+, Cu2+, Hg2+ and Cd2+. Furthermore, the developed method showed a great potential for the determination of metal ions in the crayfish, beebread and Dendrobium officinale samples.
Collapse
|
13
|
Wang W, Sang Q, Yang M, Du J, Yang L, Jiang X, Han X, Zhao B. Detection of several quinolone antibiotic residues in water based on Ag-TiO 2 SERS strategy. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 702:134956. [PMID: 31710852 DOI: 10.1016/j.scitotenv.2019.134956] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 10/05/2019] [Accepted: 10/11/2019] [Indexed: 05/05/2023]
Abstract
Herein, a surface-enhanced Raman scattering (SERS) strategy based on semiconducting substrate was exploited for detection of several antibiotic residues both in ultrapure water system and in actual water system. The as-prepared Ag-TiO2 (Ag synchronously deposited and doped TiO2) nanoparticle SERS-active substrate can achieve high sensitive SERS detection for difloxacin hydrochloride, ciprofloxacin, enrofloxacin, danofloxacin and enoxacin (five widely used quinolone antibiotics) in actual water samples, and the detection limits are as low as 4.36 × 10-12, 7.08 × 10-11, 3.94 × 10-11, 3.16 × 10-11 and 3.15 × 10-10 mol/L, respectively. These detection limits are far below the maximum of residue limit (3.01 × 10-7 mol/L) stipulated by the European Union. And, the desirable quantitative relationships can be obtained in a wide concentration range. The recoveries of five antibiotic residues from spiked actual water samples are found to be more than 80.8% with the relative standard deviations between 2.1% and 4.7%. Even, the proposed SERS method can accurately distinguish every antibiotic species from a mixed antibiotic residue sample with multiple antibiotics. And, Ag-TiO2 nanoparticles can also serve as an efficient photocatalyst for photocatalytic degradation of these antibiotic residues, which provides a multi-functional platform for synchronous determination and degradation of antibiotic residues in real environment.
Collapse
Affiliation(s)
- Weie Wang
- College of Pharmacy, Jiamusi University, Jiamusi 154007, People's Republic of China; College of Materials Science and Engineering, Jiamusi University, Jiamusi 154007, People's Republic of China
| | - Qinqin Sang
- College of Pharmacy, Jiamusi University, Jiamusi 154007, People's Republic of China
| | - Ming Yang
- College of Pharmacy, Jiamusi University, Jiamusi 154007, People's Republic of China
| | - Juan Du
- College of Pharmacy, Jiamusi University, Jiamusi 154007, People's Republic of China
| | - Libin Yang
- College of Pharmacy, Jiamusi University, Jiamusi 154007, People's Republic of China; College of Materials Science and Engineering, Jiamusi University, Jiamusi 154007, People's Republic of China.
| | - Xin Jiang
- College of Pharmacy, Jiamusi University, Jiamusi 154007, People's Republic of China
| | - Xiaoxia Han
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, People's Republic of China
| | - Bing Zhao
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, People's Republic of China
| |
Collapse
|
14
|
Wu Y, Wen X, Fan Z. An AIE active pyrene based fluorescent probe for selective sensing Hg 2+ and imaging in live cells. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 223:117315. [PMID: 31277030 DOI: 10.1016/j.saa.2019.117315] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 06/22/2019] [Accepted: 06/23/2019] [Indexed: 06/09/2023]
Abstract
A novel fluorescence probe pyrene based derivatives (1) with aggregation induced emission (AIE) properties was synthesized by an easy procedure. The probe 1 was characterized by UV-vis, Fluorescent, NMR, MS, SEM etc. It displayed high sensitivity and selectivity to Hg2+ compared with other metal ions in H2O/DMF solvent and the detection limit was 4.2 × 10-7 M. Upon addition of Hg2+, the 1 - Hg2+ compound was formed with the formation of 2:1. More importantly, the probe exhibited very low cytotoxicity and strong fluorescence emission in live cells. This showed that the probe had potential applications for detection of Hg2+ in environment and biosystems.
Collapse
Affiliation(s)
- Yaqin Wu
- School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, PR China
| | - Xiaoye Wen
- School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, PR China
| | - Zhefeng Fan
- School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, PR China.
| |
Collapse
|
15
|
Xu L, Shi Q, Tang BC, Xie S. A New Plant Indicator ( Artemisia lavandulaefolia DC.) of Mercury in Soil Developed by Fourier-Transform Near-Infrared Spectroscopy Coupled with Least Squares Support Vector Machine. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2019; 2019:3240126. [PMID: 31583158 PMCID: PMC6754876 DOI: 10.1155/2019/3240126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 08/17/2019] [Indexed: 06/10/2023]
Abstract
A rapid indicator of mercury in soil using a plant (Artemisia lavandulaefolia DC., ALDC) commonly distributed in mercury mining area was established by fusion of Fourier-transform near-infrared (FT-NIR) spectroscopy coupled with least squares support vector machine (LS-SVM). The representative samples of ALDC (stem and leaf) were gathered from the surrounding and distant areas of the mercury mines. As a reference method, the total mercury contents in soil and ALDC samples were determined by a direct mercury analyzer incorporating high-temperature decomposition, catalytic adsorption for impurity removal, amalgamation capture, and atomic absorption spectrometry (AAS). Based on the FT-NIR data of ALDC samples, LS-SVM models were established to distinguish mercury-contaminated and ordinary soil. The results of reference analysis showed that the mercury level of the areas surrounding mercury mines (0-3 kilometers, 7.52-88.59 mg/kg) was significantly higher than that of the areas distant from mercury mines (>5 kilometers, 0-0.75 mg/kg). The LS-SVM classification model of ALDC samples was established based on the original spectra, smoothed spectra, second-derivative (D2) spectra, and standard normal transformation (SNV) spectra, respectively. The prediction accuracy of D2-LS-SVM was the highest (0.950). FT-NIR combined with LS-SVM modeling can quickly and accurately identify the contaminated ALDC. Compared with traditional methods which rely on naked eye observation of plants, this method is objective and more sensitive and applicable.
Collapse
Affiliation(s)
- Lu Xu
- College of Material and Chemical Engineering, Tongren University, Tongren 554300, Guizhou, China
| | - Qiong Shi
- The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, China
| | - Bang-Cheng Tang
- College of Material and Chemical Engineering, Tongren University, Tongren 554300, Guizhou, China
| | - Shunping Xie
- Technology Center, China Tobacco Guizhou Industrial Co., Ltd., Guiyang 550009, Guizhou, China
| |
Collapse
|