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Geng C, Zhang T, Dong Z, Lu Y, Ma B, Xu Y, Yang Z, Liang S, Ding X. Development of an atmospheric pressure plasma-based OES device for in-situ mapping of Cd and related elements in plants. Talanta 2024; 275:126196. [PMID: 38705018 DOI: 10.1016/j.talanta.2024.126196] [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: 12/22/2023] [Revised: 04/02/2024] [Accepted: 04/30/2024] [Indexed: 05/07/2024]
Abstract
We have developed an innovative optical emission spectrometry imaging device integrating a diode laser for sample introduction and an atmospheric pressure plasma based on dielectric barrier discharge for atomization and excitation. By optimizing the device parameters and ensuring appropriate leaf moisture, we achieved effective imaging with a lateral resolution as low as 50 μm. This device allows for tracking the accumulation of Cd and related species such as K, Zn, and O2+∙, in plant leaves exposed to different Cd levels and culture times. The results obtained are comparable to established in-lab imaging and quantitative methods. With its features of compact construction, minimal sample preparation, ease of operation, and low limit of detection (0.04 μg/g for Cd), this novel methodology shows promise as an in-situ elemental imaging tool for interdisciplinary applications.
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Affiliation(s)
- Chaoqun Geng
- Department of Pharmaceutical Analysis, School of Pharmacy, Qingdao University Medical College, Qingdao, 266071, China
| | - Tiantian Zhang
- Department of Pharmaceutical Analysis, School of Pharmacy, Qingdao University Medical College, Qingdao, 266071, China
| | - Zheng Dong
- Shandong Qingdao Hospital of Integrated Traditional and Western Medicine, Qingdao, 266002, China
| | - Yuan Lu
- College of Physics and Optoelectronic Engineering, Ocean University of China, Qingdao, 266100, China
| | - Biao Ma
- Element Focus (Shanghai) Intelligent Technology Co., Ltd., Shanghai, 200122, China
| | - Yuan Xu
- Element Focus (Shanghai) Intelligent Technology Co., Ltd., Shanghai, 200122, China
| | - Zhao Yang
- Qingdao Institute for Food and Drug Control, Qingdao, 266071, China.
| | - Shuai Liang
- Department of Medicinal Chemistry, School of Pharmacy, Qingdao University Medical College, Qingdao, 266071, China; Qingdao University - Aliben Science & Technology Collaborative Instrument R&D Center, Qingdao, 266071, China.
| | - Xuelu Ding
- Department of Pharmaceutical Analysis, School of Pharmacy, Qingdao University Medical College, Qingdao, 266071, China; Qingdao University - Aliben Science & Technology Collaborative Instrument R&D Center, Qingdao, 266071, China.
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Liu X, Luo Y, Lin T, Xie Z, Qi X. Gold nanoclusters-based fluorescence resonance energy transfer for rapid and sensitive detection of Pb 2. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 315:124302. [PMID: 38640623 DOI: 10.1016/j.saa.2024.124302] [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: 11/14/2023] [Revised: 04/12/2024] [Accepted: 04/14/2024] [Indexed: 04/21/2024]
Abstract
Lead pollution has remained a significant global concern for several decades due to its detrimental effects on the brain, heart, kidneys, lungs, and immune system across all age groups. Addressing the demand for detecting trace amounts of lead in food samples, we have developed a novel biosensor based on fluorescence resonance energy transfer (FRET) from fluorescein R6G to gold nanoclusters (AuNCs-CCY). By utilizing polypeptides as a template, we successfully synthesized AuNCs-CCY with an excitation spectrum that overlaps with the emission spectrum of R6G. Exploiting the fact that Pb2+ induces the aggregation of gold nanoclusters, leading to the separation of R6G from AuNCs-CCY and subsequent fluorescence recovery, we achieved the quantitative detection of Pb2+. Within the concentration range of 0.002-0.20 μM, a linear relationship was observed between the fluorescence enhancement value (F-F0) and Pb2+ concentration, characterized by the linear equation y = 2398.69x + 87.87 (R2 = 0.996). The limit of detection (LOD) for Pb2+ was determined to be 0.00079 μM (3σ/K). The recovery rate ranged from 96 % to 104 %, with a relative standard deviation (RSD) below 10 %. These findings demonstrate the potential application value of our biosensor, which offers a promising approach to address the urgent need for sensitive detection of heavy metal ions, specifically Pb2+, in food samples.
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Affiliation(s)
- Xuemei Liu
- Faculty of Environment and Life, Beijing University of Technology, No. 100, Pingleyuan, Chaoyang District, Beijing 100124, China.
| | - Yunjing Luo
- Faculty of Environment and Life, Beijing University of Technology, No. 100, Pingleyuan, Chaoyang District, Beijing 100124, China.
| | - Taifeng Lin
- Faculty of Environment and Life, Beijing University of Technology, No. 100, Pingleyuan, Chaoyang District, Beijing 100124, China.
| | - Ziqi Xie
- Faculty of Materials and Manufacture, Beijing University of Technology, No. 100, Pingleyuan, Chaoyang District, Beijing 100124, China.
| | - Xiaohua Qi
- Chinese Academy of Inspection and Quarantine, Beijing 100123, China.
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Li J, Hou L, Jiang Y, Wei MJ, Wang CS, Li HY, Kong FY, Wang W. Photoelectrochemical detection of copper ions based on a covalent organic framework with tunable properties. Analyst 2024; 149:2045-2050. [PMID: 38407274 DOI: 10.1039/d4an00026a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Copper ions (Cu2+) play an essential role in various cellular functions, including respiration, nerve conduction, tissue maturation, oxidative stress defense, and iron metabolism. Covalent organic frameworks (COFs) are a class of porous crystalline materials with directed structural designability and high stability due to the combination of different monomers through covalent bonds. In this study, we synthesized a porphyrin-tetrathiazole COF (TT-COF(Zn)) with Zn-porphyrin and tetrathiafulvalene (TTF) as monomers and used it as a photoactive material. The strong light absorption of metalloporphyrin and the electron-rich properties of supplied TTF contribute to its photoelectrochemical performance. Additionally, the sulfur (S) in the TTF can coordinate with Cu2+. Based on these properties, we constructed a highly sensitive photoelectrochemical sensor for detecting Cu2+. The sensor exhibited a linear range from 0.5 nM to 500 nM (R2 = 0.9983) and a detection limit of 0.15 nM for Cu2+. Notably, the sensor performed well when detecting Cu2+ in water samples.
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Affiliation(s)
- Jing Li
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China.
| | - Lu Hou
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China.
| | - Yue Jiang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China.
| | - Mei-Jie Wei
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China.
| | - Cheng-Shuang Wang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China.
| | - Heng-Ye Li
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China.
| | - Fen-Ying Kong
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China.
| | - Wei Wang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China.
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Redeker FA, O’Malley K, McMahon WP, Jorabchi K. Solution Cathode Glow Discharge Coupled to Atmospheric Pressure Chemical Ionization for Elemental Detection of S and P in Organic Compounds. SPECTROCHIMICA ACTA. PART B, ATOMIC SPECTROSCOPY 2024; 212:106858. [PMID: 38292419 PMCID: PMC10824527 DOI: 10.1016/j.sab.2024.106858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
We report a post-plasma chemical ionization approach to evaluate solution cathode glow discharge (SCGD) for S and P elemental analysis. Here, the SCGD serves as a reactor to produce chemical vapors for S and P from organic compounds containing these elements, while a corona discharge operated in negative mode is used to ionize the products. The approach creates long-lived ions in atmospheric pressure, enabling direct investigation of chemical vapor products via mass spectrometric and ion mobility separations. The investigations indicate that SCGD converts S and P to H2SO4 and H3PO4, respectively. These species are then ionized as HSO4HNO3 - and H3PO4NO3HNO3- via reactions with NO3HNO3- produced by corona discharge. The response factors for P among several small molecules varies within 10% of the average response from the compounds, suggesting a reasonable species-independent characteristic. The response factors for S show larger variations among compounds, indicating a higher dependence of chemical vapor generation efficiency on analytes' chemical structures. Detection limits of 15 and 29 ng/mL are achieved for P and S detection, respectively. These figures are limited by background equivalent concentrations and low ion flux in the utilized ion mobility-time of flight mass spectrometer, indicating potential for significant improvements. In particular, the specificity of clustering for S and P-containing ions produced in this approach suggest facile analysis of S and P using quadrupole-based mass spectrometers for improved analytical performance.
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Affiliation(s)
- Frenio A. Redeker
- Department of Chemistry, Georgetown University, 37 and O streets, NW, Washington, DC 20057, USA
| | - Kelsey O’Malley
- Department of Chemistry, Georgetown University, 37 and O streets, NW, Washington, DC 20057, USA
| | | | - Kaveh Jorabchi
- Department of Chemistry, Georgetown University, 37 and O streets, NW, Washington, DC 20057, USA
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Yu X, Chang W, Cai Z, Yu C, Lai L, Zhou Z, Li P, Yang Y, Zeng C. Hg 2+ detection and information encryption of new [1+1] lanthanide cluster. Talanta 2024; 266:125105. [PMID: 37639872 DOI: 10.1016/j.talanta.2023.125105] [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: 06/25/2023] [Revised: 08/16/2023] [Accepted: 08/21/2023] [Indexed: 08/31/2023]
Abstract
The sensing of heavy metal ion and information encryption are two very important research areas. Therefore, developing multi-functional materials capable of sensing heavy metal ions and encrypting information is highly important. In this work, three [1 + 1] lanthanide clusters [Ln(TFBA)3(dmp) (H2O)2]2 (Ln = Tb3+Tb1+1, Eu3+Eu1+1, Gd3+Gd1+1, HTFBA = 2,3,4,5-tetrafluorobenzoic acid, dmp = 4,7-dimethyl-1,10-phenanthroline) were designed and synthesized. Among them, Tb1+1 shows excellent luminescence sensing towards Hg2+ (Ex = 350 nm, Em = 545 nm). Results demonstrates the sensing with high selectivity, strong anti-interference, 20-s response time, high accuracy, excellent linear relationship in 0-20.0 μM, and a very low limit of detection (0.02 ppb). Furthermore, paper strips based on Tb1+1 is fabricated for visual detection of Hg2+ in real samples of tap water, lake water, human urine, and human serum. More interestingly, a new method for confidentiality of information is realized through multi-color anti-counterfeiting patterns with the [1 + 1] lanthanide cluster ink, based on the luminescence "on-off" sensing towards Hg2+.
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Affiliation(s)
- Xiaobo Yu
- Department of Chemistry and Chemical Engineering and Nanofiber Engineering Center of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, PR China; National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Nanchang, 330022, PR China
| | - Wenting Chang
- Department of Chemistry and Chemical Engineering and Nanofiber Engineering Center of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, PR China; National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Nanchang, 330022, PR China
| | - Ziyan Cai
- Department of Chemistry and Chemical Engineering and Nanofiber Engineering Center of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, PR China; National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Nanchang, 330022, PR China
| | - Cilin Yu
- Department of Chemistry and Chemical Engineering and Nanofiber Engineering Center of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, PR China; National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Nanchang, 330022, PR China
| | - Lin Lai
- Department of Chemistry and Chemical Engineering and Nanofiber Engineering Center of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, PR China; National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Nanchang, 330022, PR China
| | - Ziyin Zhou
- Department of Chemistry and Chemical Engineering and Nanofiber Engineering Center of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, PR China; National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Nanchang, 330022, PR China
| | - Ping Li
- Department of Chemistry and Chemical Engineering and Nanofiber Engineering Center of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, PR China; National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Nanchang, 330022, PR China
| | - Yangyi Yang
- School of Materials Science and Engineering, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Chenghui Zeng
- Department of Chemistry and Chemical Engineering and Nanofiber Engineering Center of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, PR China; National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Nanchang, 330022, PR China; School of Materials Science and Engineering, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China.
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Başoğlu A. Green synthesis of fluorescent carbon dots from Robinia hispida L. leaves for selective detection of Hg (II). Methods Appl Fluoresc 2023; 11:045010. [PMID: 37703892 DOI: 10.1088/2050-6120/acf97c] [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: 06/13/2023] [Accepted: 09/13/2023] [Indexed: 09/15/2023]
Abstract
In this study, Robinia hispida L leaves (RH) was used as a precursor for the first time to synthesize fluorescent carbon dots (CDs) with stable blue fluorescence by a single-step hydrothermal synthesis method. Notably, the innovative approach eliminates the necessity for toxic chemicals or hazardous substances, marking a significant advancement in the field. The synthesized CDs demonstrate CDs demonstrates the predominance of spherical shapes with an average size of 11.63 ± 1.92 nm. The CDs not only exhibit an enhanced fluorescent efficiency with a relatively high quantum yield of up to 6.8%, but they also possess the potential for direct utilization in the selective determination of Hg(II) through fluorescence quenching, even without any functionalization. Under the optimized conditions at a pH of 7.0, a robust linear correlation was found to exist between the fluorescence intensity and the concentration of Hg (II) within the range of 5-17.5μM, exhibiting a detection limit (3σ) of 1.5μM. Additionally, this methodology was effectively employed to successfully detect Hg (II) ions in various aqueous samples, including tap water, spring water, drinking water, and a certified reference material (CRM-SA-C Sandy Soil C). The spike recoveries of 97.6%-101.6% with less than 2.7% variability were performed on all samples.
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Affiliation(s)
- Aysel Başoğlu
- Gümüşhane University, Department of Occupational Health and Safety, Faculty of Health Sciences, 29100 Gümüşhane, Turkey
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Pinto JJ, Mánuel V, Moreno C. A Green Method for the Determination of Cadmium in Natural Waters Based on Multi-Fibre Supported Liquid Membranes. MEMBRANES 2023; 13:327. [PMID: 36984714 PMCID: PMC10058480 DOI: 10.3390/membranes13030327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/06/2023] [Accepted: 03/09/2023] [Indexed: 06/18/2023]
Abstract
Supported liquid membranes have been used to implement a hollow fibre liquid-phase microextraction (HF-LPME) method for the preconcentration of Cd(II) in natural waters as a sample preparation step for its determination by high-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS-GFAAS). This system was designed to use four hollow fibres simultaneously with the same sample, thus improving the simplicity, speed and reproducibility of the results. The organic liquid membrane bis-(2,4,4-trimethylpentyl) phosphinic acid (Cyanex® 272) dissolved in dihexylether (DHE) was immobilised into the pores of the walls of polypropylene hollow fibres. After extraction, the cadmium-enriched acidic phases were recovered and analysed by triplicate. To optimise the extraction process, the effect of both physical and chemical variables was studied, and optimum results with an enrichment factor (EF) of 292 were obtained for a fibre length of 6 cm, 1.06 M Cyanex 272, 0.04 M HNO3, stirring rate of 600 rpm and an extraction time of 4.26 h. For practical applications, extraction time was reduced to 2 h, keeping the EF as high as 130. Under these conditions, a detection limit of 0.13 ng L-1 Cd(II) was obtained, with a reproducibility of 3.3 % and a linear range up to 3 µg L-1 being achieved. The proposed method was successfully applied to the determination of cadmium in mineral, tap and seawater samples.
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Greda K, Welna M, Szymczycha-Madeja A, Pohl P. Flow injection gas analysis (FIGA) for more sensitive determination of Hg by inductively coupled plasma optical emission spectrometry. Talanta 2022. [DOI: 10.1016/j.talanta.2022.124072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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