1
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Cai Y, Zhou H, Li W, Yao C, Wang J, Zhao Y. A chemiluminescence method induced by microplasma jet for nitrites detection and the miniature detection system using smartphone. Anal Chim Acta 2023; 1267:341339. [PMID: 37257970 DOI: 10.1016/j.aca.2023.341339] [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: 02/04/2023] [Revised: 04/19/2023] [Accepted: 05/08/2023] [Indexed: 06/02/2023]
Abstract
A method of luminol-diazonium chemiluminescence (CL) induced by microplasma for hazardous substance detection is proposed. The luminol-diazonium CL is caused by microplasma jet, rather than hydrogen peroxide reagent or other oxidizing agents. The CL intensity is increased by the concentration of nitrites. Based on the process of microplasma generation and CL mechanism, the optimal work conditions of the method are obtained. The linear range for nitrites detection is 0.03-1 mmol L-1 with the limit of detection (LOD) of 0.01 mmol L-1. Furthermore, a miniature system using test paper and smartphone is designed for nitrites detection in emergency. The detection system is confined in the custom-tailored shell which is only 28 cm in length, 18 cm in width and 10 cm in height. After microplasma jet treatment, the color of the test paper changes with the NO2- concentration. The photographs of the test paper are taken by the built-in camera of smartphone and analyzed by visiting the website via smartphone. The LOD is 1 mmol L-1 obtained by the CL miniature detection system based on test paper and smartphone. The accuracy, reliability and practicability of the proposed method is verified in this paper.
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Affiliation(s)
- Yi Cai
- School of Control Engineering, Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, China; College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China.
| | - Han Zhou
- School of Control Engineering, Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, China; College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China
| | - Wei Li
- School of Control Engineering, Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, China
| | - Cheng Yao
- School of Control Engineering, Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, China
| | - Jianhua Wang
- Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110819, China
| | - Yong Zhao
- School of Control Engineering, Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, China; College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China.
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2
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Wang Y, Lin Y, Ren T, Yang Y, He Z, Deng Y, Zheng C. Battery-Operated and Self-Heating Solid-Phase Microextraction Device for Field Detection and Long-Term Preservation of Mercury in Soil. Anal Chem 2023; 95:10873-10878. [PMID: 37436933 DOI: 10.1021/acs.analchem.3c00686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
The application of headspace solid-phase microextraction (HS-SPME) for mercury preservation and detection still has several shortcomings, including the use of high-temperature desorption chamber, the consumption of expensive reagent (NaBEt4 or NaBPr4), and analyte loss during sample storage. Herein, a self-heating HS-SPME device using a gold-coated tungsten (Au@W) fiber was developed for the field detection of mercury in soil by miniature point discharge optical emission spectrometry (μPD-OES). Hg2+ was reduced to Hg0 with NaBH4 solution and then preconcentrated with the Au@W fiber. The adsorbed Hg0 could be rapidly desorbed by directly heating the fiber with a mini lithium battery and subsequently detected by μPD-OES. A limit of detection (LOD) of 0.008 mg kg-1 was obtained with a relative standard deviation (RSD) of 2.4%. The accuracy of the self-heating HS-SPME was evaluated by analyzing a soil certified reference material (CRM) and nine soil samples with satisfactory recoveries (86-111%). Compared to the conventional external heating method, the proposed method reduces desorption time and power consumption from 80 s and 60 W to 20 s and 2.5 W, respectively. Moreover, the self-heating device enables the μPD-OES system to remove the high-temperature desorption chamber, making it more compact and suitable for field analytical chemistry. Interestingly, the Au@W SPME fiber can be also used for the long-term preservation of mercury with a sample loss rate <5% after 30 days of storage at room temperature.
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Affiliation(s)
- Yao Wang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yao Lin
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, China
| | - Tian Ren
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yuan Yang
- Department of Chemistry, College of Science, Xihua University, Chengdu, Sichuan 610039, China
| | - Zhao He
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yurong Deng
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Chengbin Zheng
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
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Zhang M, Tang Q, Li P, He L, Hou X, Jiang X. Array Point Discharge as Enhanced Tandem Excitation Source for Miniaturized Optical Emission Spectrometer. Anal Chem 2023; 95:5151-5158. [PMID: 36878017 DOI: 10.1021/acs.analchem.3c00306] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
A new compact tandem excitation source was designed and constructed by using an array point discharge (ArrPD) microplasma for a miniaturized optical emission spectrometer through coupling a hydride generation (HG) unit as a sample introduction device. Three pairs of point discharges were arranged in sequence in a narrow discharge chamber to construct the ArrPD microplasma, for improved excitation capability owing to the serial excitation. Besides, the discharge plasma region was greatly enlarged, therefore, more gaseous analytes could be intercepted to enter into the microplasma for sufficient excitation, for improved excitation efficiency and OES signal. To better understand the effectiveness of the proposed ArrPD source, a new instrument for simultaneous detection of atomic emission and absorption spectral responses was also proposed, designed, and constructed to reveal the excitation and enhancement process in the discharge chamber. Under the optimized conditions, the limits of detection (LODs) of As, Ge, Hg, Pb, Sb, Se, and Sn were 0.7, 0.4, 0.05, 0.7, 0.3, 2, and 0.08 μg L-1, respectively, and the relative standard deviations (RSDs) were all less than 4%. Compared with a commonly used single point discharge microplasma source, the analytical sensitivities of these seven elements were improved by 3-6-fold. Certified Reference Materials (CRMs) were successfully analyzed with this miniaturized spectrometer, which features low power, compactness, portability, and high detectability, and is thereby a great prospect in the field of elemental analytical chemistry.
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Affiliation(s)
- Meng Zhang
- Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Qingsong Tang
- Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Peixia Li
- Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Lin He
- Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Xiandeng Hou
- Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
- Key Lab of Green Chemistry and Technology of MOE, and College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Xiaoming Jiang
- Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
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He L, Lin Y, Su Y, Li Y, Deng Y, Zheng C. Sensitive and Environmentally Friendly Field Analysis of Waterborne Arsenic by Electrochemical Hydride Generation Microplasma Optical Emission Spectrometry. Anal Chem 2022; 94:17514-17521. [PMID: 36469951 DOI: 10.1021/acs.analchem.2c03784] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
To avoid polluting the environment, it is desirable to develop methods consuming as few chemicals as possible for field elemental analysis. In this work, a lithium-ion battery supplied, compact handheld optical emission spectrometer (OES) (0.3 kg, length 18 cm × width 5 cm × height 10 cm) was fabricated for the sensitive field analysis of waterborne arsenic by utilizing electrochemical hydride generation (ECHG) and miniaturized ballpoint discharge (μPD) as sample introduction means and excitation source, respectively. The high ECHG efficiency of arsenic was obtained using a superior cathode of Fe@PbO/Pb and the generated arsine was separated from an aqueous phase and further swept to the μPD microplasma for detection. It is worth noting that the Fe@PbO/Pb cathode not only retains advantages of large specific surface area, robust stability, and excellent reproducibility for the ECHG of arsenic but also accomplishes the preconcentration of As(III), thus improving the kinetics of the surface chemistry at the cathode, alleviating the corrosion of the electrode, and minimizing the release of Pb. A limit of detection of 1.0 μg L-1 was obtained with a relative standard deviation of 4.2% for 20 μg L-1 As(III). Owing to the advantages of ECHG and μPD-OES, the system retains a promising potential for the sensitive, cost-effective, and environmentally friendly field analysis of waterborne arsenic.
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Affiliation(s)
- Liangbo He
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yao Lin
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yubin Su
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yuanyuan Li
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yurong Deng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Chengbin Zheng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
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5
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He L, Lin Y, Chen P, Su Y, Li Y, Zheng C. A microplasma optical emission spectrometry pen for point-of-care diagnosis of child blood lead. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129607. [PMID: 35907282 DOI: 10.1016/j.jhazmat.2022.129607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 07/03/2022] [Accepted: 07/13/2022] [Indexed: 02/05/2023]
Abstract
Blood lead levels (BLL) of children have attracted considerable attention due to their putative impact on intelligence decline. However, most methods used for the determination of blood lead typically require expensive, bulky, high power and gas consuming instrumentation, limiting their application for a point-of-care diagnosis. Herein we report the development and testing of a portable ballpoint discharge microplasma optical emission spectrometer (BD-OES pen) device having the potential to fill this needed measurement capability. The BD-OES pen utilizes a compact ballpoint-pen format integrating point-discharge microplasma, which permits the determination of child BLL requiring no more than 100 μL blood while providing high specificity, sensitivity and satisfactory limit of detection (0.73 μg L-1). The handheld BD-OES pen is successfully used to diagnose BLL of 16 asymptomatic children on-site, two of whom had excessive the normal BLL. The pen may aid the on-site and rapid diagnosis of childhood BLL, particularly in low-income areas.
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Affiliation(s)
- Liangbo He
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yao Lin
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, China
| | - Piaopiao Chen
- Department of Laboratory Medicine, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, West China Precision Medicine Industrial Technology Institute, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yubin Su
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yuanyuan Li
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Chengbin Zheng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China.
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In Situ Detection of Trace Heavy Metal Cu in Water by Atomic Emission Spectrometry of Nebulized Discharge Plasma at Atmospheric Pressure. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12104939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The in situ detection of trace heavy metal is very important for human health and environmental protection. In this paper, a novel and stable nebulized discharge excited by an alternating current (AC) power supply at atmospheric pressure is employed to detect the trace metal copper by atomic emission spectrometry. Different from the previous experiments in which a conductive object was wrapped around a pneumatic nebulizer directly as a discharge electrode. Plasma is generated near needle electrodes and aerosol is introduced from above the electrode gap by a pneumatic nebulizer, which avoid damage to the fragile device. The effects of applied voltage, gas flow rate, pH value of liquid, and concentration of organic addition agents on the emission intensity of Cu I (3d104p-3d104s, 324.75 nm) are investigated for the purpose of optimizing the experiment conditions. For studying the discharge characteristics and understanding the mechanisms of metal atomic excitation, the waveforms of applied voltage and discharge current are measured, and the vibrational and rotational temperature are calculated by the spectra of N2 (C3∏u-B3∏g, Δυ = −2). In addition, gas temperature evolution of nebulized discharge is acquired and it is found that the emission intensity of Cu I (3d104p-3d104s, 324.75 nm) can be affected by applied voltage, gas flow rate, pH value of liquid, and concentration of organic addition agents. An optimized experimental condition of nebulized discharge for Cu detection is 3.59 of the pH, 5.6 kV of applied voltage, 1.68 L/min of Ar flow rate, and 2% of the ethanol. Under this condition, the limit of detection (LOD) of Cu can reach up to 0.083 mg/L.
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7
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Li P, Hu J, Zhang M, He L, Li K, Hou X, Jiang X. Microdischarge in Flame as a Source-in-Source for Boosted Excitation of Optical Emission of Chromium. Anal Chem 2022; 94:7683-7691. [PMID: 35549155 DOI: 10.1021/acs.analchem.2c01105] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A compact tandem excitation source-in-source was designed by arranging a point discharge (PD) ignited in argon/hydrogen (Ar/H2) flame and utilized for boosted excitation for the optical emission of chromium. Through a tungsten coil (W-coil) electrothermal vaporizer (ETV) located right under the tandem source without any interface for sample introduction, a miniaturized optical emission spectrometer was realized. Because the discharge gaseous atmosphere of PD was activated in the flame, the energy consumption of PD for breaking down discharge gas and maintenance of plasma was greatly saved. In addition, the flame could partially atomize or keep the atomized state of analyte atoms through its reducing environment. Therefore, the excitation capability of the tandem source was greatly improved, owing to the synergistic effect of PD microplasma and Ar/H2 flame. In addition, part of the analyte was atomized/excited on the W-coil, and thereby, dry, pure, and activated analyte species were released from the W-coil and swept into the tandem source for atomization/excitation. Through the collective effect of W-coil ETV, Ar/H2 flame, and PD microplasma, analytical sensitivity for Cr was greatly enhanced. Under the optimized conditions, with 10 μL sample solution, a limit of detection of 1.5 μg L-1 and a relative standard deviation of 3.6% (20 μg L-1, n = 5) were achieved. Its accuracy was demonstrated by successful analysis of several certified reference materials. Owing to the advantages including high sensitivity, compactness, and cost effectiveness, it is promising to facilitate the miniaturized spectrometer for more elements and potential field analytical chemistry.
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Affiliation(s)
- Peixia Li
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Jing Hu
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Meng Zhang
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Lin He
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Kai Li
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Xiandeng Hou
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China.,Key Lab of Green Chemistry & Technology of MOE, and College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Xiaoming Jiang
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
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Zheng P, Hu Q, Zhang H, Wang J, Yang Y, He Y, Wu M, Tian H, Dong D, Mao X, Lai C. Elemental Analysis of Environmental Waters by Solution Cathode Glow Discharge—Atomic Emission Spectrometry (SCGD-AES) with a Multifunctional Injection System. ANAL LETT 2022. [DOI: 10.1080/00032719.2022.2053146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Peichao Zheng
- College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing Municipal Level Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology, Chongqing, Beijing, China
| | - Qiang Hu
- College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing Municipal Level Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology, Chongqing, Beijing, China
| | - Hangxi Zhang
- College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing Municipal Level Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology, Chongqing, Beijing, China
| | - Jinmei Wang
- College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing Municipal Level Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology, Chongqing, Beijing, China
| | - Yang Yang
- College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing Municipal Level Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology, Chongqing, Beijing, China
| | - Yuxin He
- College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing Municipal Level Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology, Chongqing, Beijing, China
| | - Meini Wu
- College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing Municipal Level Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology, Chongqing, Beijing, China
| | - Hongwu Tian
- Research Center of Intelligent Equipment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Daming Dong
- National Engineering Research Center for Information Technology in Agriculture, Beijing, China
| | - Xuefeng Mao
- College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing Municipal Level Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology, Chongqing, Beijing, China
| | - Chunhong Lai
- College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing Municipal Level Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology, Chongqing, Beijing, China
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9
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Yang C, Cheng G, Cheng SQ, Liu X, Liu Y, Zheng HT, Hu SH, Zhu ZL. Direct and Sensitive Determination of Antimony in Water by Hydrogen-Doped Solution Anode Glow Discharge-Optical Emission Spectrometry Without Hydride Generation. Anal Chem 2021; 93:16393-16400. [PMID: 34859666 DOI: 10.1021/acs.analchem.1c02940] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the present work, a novel, simple, and sensitive method for the direct determination of trace Sb in water samples was developed based on hydrogen-doped solution anode glow discharge-optical emission spectrometry (SAGD-OES). It was found that the vapor generation and excitation of Sb occurred simultaneously in the SAGD, contributing to the significant improvement in the sensitivity of Sb as compared with normal pure He-operated SAGD or solution cathode glow discharge. Besides, the proposed hydrogen-doped SAGD-OES could be operated even at pH = 14, which could reduce the interference of coexisting ions as many metal ions could be precipitated and removed. Our results demonstrated that the proposed method offered good tolerance to the interferences of Li, Na, Ca, Mg, Fe, Ni, Mn, and Zn ions even at a concentration of 50 mg L-1. Under optimized conditions, the limit of detection of Sb was 0.85 μg L-1, which was comparable to that of microplasma sources coupled with conventional hydride generation. The linearity of the Sb calibration curve reached R2 > 0.999 in the 5-5000 μg L-1 range. Finally, the accuracy of the proposed method was validated by the determination of certified reference materials [GSB 07-1376-2001 (1) and (2))] and real water samples. The proposed low-power (6 W), green, sensitive, rapid, and robust method provides a promising approach for on-site trace Sb analysis and may also be extended to other elements.
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Affiliation(s)
- Chun Yang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Guo Cheng
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Shuang-Quan Cheng
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Xing Liu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Ying Liu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Hong-Tao Zheng
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Sheng-Hong Hu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Zhen-Li Zhu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China.,State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution, Ministry of Ecology and Environment, Wuhan 430074, China
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10
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Zhang Y, Liu J, Mao X, Chen G, Tian D. Review of miniaturized and portable optical emission spectrometry based on microplasma for elemental analysis. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116437] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Deng Y, Li K, Hou X, Jiang X. Flow injection hydride generation and on-line W-coil trapping for electrothermal vaporization dielectric barrier discharge atomic emission spectrometric determination of trace cadmium. Talanta 2021; 233:122516. [PMID: 34215131 DOI: 10.1016/j.talanta.2021.122516] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 04/16/2021] [Accepted: 04/24/2021] [Indexed: 10/21/2022]
Abstract
A fast, low-cost and sensitive method for the determination of trace cadmium was developed by using a miniaturized dielectric barrier discharge microplasma atomic emission spectrometer coupled with a tungsten coil (W-coil) for on-line hydride generation trapping-electrothermal vaporization. Total sample throughput can be greatly improved through the adoption of a horizontally fixed W-coil and the flow injection mode. In addition, the horizontally fixed W-coil and an inserted quartz capillary for on-line trapping contributed to stable and good signal even at a high gas flow rate when volatile cadmium species were trapped, and less sample-consuming and time-saving can be realized in this work. Compared to direct injection, the sensitivity and the LOD were improved by 29- and 38-fold, respectively. The proposed method provides a promising approach to develop a miniaturized instrumentation for highly sensitive detection of trace elements.
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Affiliation(s)
- Yujia Deng
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Kai Li
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Xiandeng Hou
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China; Key Lab of Green Chemistry & Technology of MOE, and College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Xiaoming Jiang
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China.
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12
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Pan X, Lin Y, Su Y, Yang J, He L, Deng Y, Hou X, Zheng C. Methanol-Enhanced Liquid Electrode Discharge Microplasma-Induced Vapor Generation of Hg, Cd, and Zn: The Possible Mechanism and Its Application. Anal Chem 2021; 93:8257-8264. [PMID: 34077178 DOI: 10.1021/acs.analchem.1c01091] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Despite increased interest in microplasma-induced vapor generation (μPIVG) over the past several years, applications in real sample analyses remain limited due to their relatively low vapor generation efficiency and ambiguous mechanism. In this work, a novel method using methanol for significantly enhancing the liquid electrode discharge μPIVG efficiency was developed for the simultaneous and sensitive determination of Hg, Cd, and Zn by atomic fluorescence spectrometry (AFS). It is worth noting that the possible enhancement mechanism was investigated via the characterizations of volatile products by AFS, microplasma optical emission spectrometry, online gas chromatography, and gas chromatography-mass spectrometry, which involved the reductive species such as electrons, hydrogen radicals (·H), methyl radicals (·CH3), and other intermediates in the argon plasma adding methanol. Under the optimized conditions, the limits of detection of 0.007, 0.05, and 0.5 μg L-1 were obtained for Hg, Cd, and Zn, respectively, with relative standard deviations of 3.1, 3.7, and 5.2% for these elements, respectively. Vapor generation efficiencies of 90, 83, and 55% were achieved for Hg, Cd, and Zn, respectively, and improved 2.7-, 4.8-, and 7.9-fold, respectively, compared to those obtained in the absence of methanol. The accuracy and practicability of the proposed method were validated by the determination of Hg, Cd, and Zn in a certified reference material (CRM, Lobster hepatopancreas, TORT-3) and crayfish samples collected from three different provinces of China.
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Affiliation(s)
- Xiaomin Pan
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yao Lin
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yubin Su
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Jiahui Yang
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Liangbo He
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yurong Deng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Xiandeng Hou
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China.,Analytical and Test Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Chengbin Zheng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
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Liu M, Ding L, Liu J, Mao X, Na X, Shao Y. Fast and High Sensitive Analysis of Lead in Human Blood by Direct Sampling Hydride Generation Coupled with in situ Dielectric Barrier Discharge Trap. ANAL SCI 2021; 37:321-327. [PMID: 32921651 DOI: 10.2116/analsci.20p201] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A direct sampling hydride generation (HG) system based on modified gas liquid separator (GLS) coupled with in situ dielectric barrier discharge (DBD) is first rendered to detect lead in blood samples. Herein, a triple-layer coaxial quartz tube was employed as DBD trap (DBDT) to replace the original atomizer of atomic fluorescence spectrometry (AFS) to satisfy the in situ preconcentration. After 40-fold dilution, foams generated from protein in a blood sample can be eliminated via the double-GLS set; and lead in a blood sample were generated as plumbane under 3.5% HNO3 (v:v) and 30 g/L NaOH with 8 g/L KBH4, 10 g/L H3BO3, and 5 g/L K3[Fe(CN)6]. Then, lead analyte was trapped on the DBD quartz surface by 9 kV discharging at 50 mL/min air; and subsequently released by 12 kV discharging at 110 mL/min H2. The absolute detection limit (LOD) for Pb was 8 pg (injection volume = 2 mL), and the linearity (R2 > 0.997) range was 0.05 - 50 μg/L. The results were in good agreement with that of blood certified reference materials (CRM), and spiked recoveries for real blood samples were 95 - 104% within a relative standard deviation of 5% (RSD). Via gas phase enrichment, the established method improved analytical sensitivity (peak height) by 8 times. The entire analysis time including blood sample preparation can be kept to within 10 min. The combination of modified GLS and DBDT can facilitate the quickness, accuracy, and sensitivity, revealing a promising future for monitoring lead in blood to protect humans, especially children's health.
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Affiliation(s)
- Meitong Liu
- College of Chemistry, Jilin University.,Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs
| | - Lan Ding
- College of Chemistry, Jilin University
| | - Jixin Liu
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs.,Beijing Ability Technology Company, Limited
| | - Xuefei Mao
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs
| | - Xing Na
- Beijing Ability Technology Company, Limited
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14
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Evaluation of a sampling system coupled to liquid cathode glow discharge for the determination of rubidium, cesium and strontium in water samples. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105246] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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15
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Yuan M, Peng X, Ge F, Zhao M, Li Q, Wang Z. Ultrasensitive determination of mercury by solution anode glow discharge atomic emission spectrometry coupled with hydride generation. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2020.03.055] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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16
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Yang Y, Wang Y, Hou X, Lin Y, Yang L, Hou X, Zheng C. Can low-temperature point discharge Be used as atomic emission source for sensitive determination of cyclic volatile methylsiloxanes? Anal Chim Acta 2020; 1124:121-128. [PMID: 32534664 DOI: 10.1016/j.aca.2020.05.030] [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: 12/19/2019] [Revised: 04/17/2020] [Accepted: 05/11/2020] [Indexed: 10/24/2022]
Abstract
Despite of increased interest in the application of miniature microplasma atomic spectrometry for environmental analytical chemistry, the amenable element detection range is limited to some metal elements and carbon due to it low power consumption. In this work, the generation of silicon atomic emission (251.6 nm and 288.2 nm) from the organosiloxanes was found possible in a low-temperature, low-power, and compact point discharge. Consequence, a tiny point discharge silicon optical emission spectrometer (μPD-OES) was exploited, and used as a novel GC detector for the determination of various cyclic volatile methyl siloxanes (cVMSs). Under the optimized conditions, the developed system provided limits of detection (LODs) of 0.2 mg L-1, 0.04 mg L-1, 0.03 mg L-1 and 0.02 mg L-1 of Si for hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane, respectively. Meanwhile, relative standard deviations (RSDs) of better than 2.3% were obtained. In contrast to gas chromatography mass spectrometer, GC-μPD-OES significantly simplifies the experimental setup with low power consumption and a miniature configuration. As far as we know, this work reports for the first time that silicon atomic emission can be generated in such low temperature microplasma. The accuracy of this system was validated by determining cVMSs in five daily-used shampoo samples collected from retail store, providing satisfactory recoveries (84%-114%) and excellent agreement with values determined by GC-MS at the 95% confidence level.
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Affiliation(s)
- Yuan Yang
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Yao Wang
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Xiaoling Hou
- Chengdu Environmental Monitoring Center, Chengdu, Sichuan, 610072, China
| | - Yao Lin
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Lu Yang
- National Research Council Canada, Ottawa, Ontario, Canada, K1A 0R6
| | - Xiandeng Hou
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Chengbin Zheng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China.
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Liu M, Ding L, Liu J, Na X, Mao X. High Sensitivity Determination of Antimony with Application for the Characterization of Its Migration in Bottled Water by a Dielectric Barrier Discharge (DBD) Coupled with Hydride Generation – Atomic Fluorescence Spectrometry (HG-AFS). ANAL LETT 2020. [DOI: 10.1080/00032719.2020.1789989] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Meitong Liu
- College of Chemistry, Jilin University, Changchun, China
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Lan Ding
- College of Chemistry, Jilin University, Changchun, China
| | - Jixin Liu
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing, China
- Beijing Ability Technology Company, Limited, Beijing, China
| | - Xing Na
- Beijing Ability Technology Company, Limited, Beijing, China
| | - Xuefei Mao
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing, China
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Cheng J, Li Q, Zhao M, Wang Z. Ultratrace Pb determination in seawater by solution-cathode glow discharge-atomic emission spectrometry coupled with hydride generation. Anal Chim Acta 2019; 1077:107-115. [DOI: 10.1016/j.aca.2019.06.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 05/22/2019] [Accepted: 06/01/2019] [Indexed: 11/26/2022]
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Liu M, Liu T, Mao X, Liu J, Na X, Ding L, Qian Y. A novel gas liquid separator for direct sampling analysis of ultratrace arsenic in blood sample by hydride generation in-situ dielectric barrier discharge atomic fluorescence spectrometry. Talanta 2019; 202:178-185. [DOI: 10.1016/j.talanta.2019.04.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 04/04/2019] [Accepted: 04/17/2019] [Indexed: 10/27/2022]
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Liu X, Zhu Z, Bao Z, He D, Zheng H, Liu Z, Hu S. Simultaneous Sensitive Determination of Selenium, Silver, Antimony, Lead, and Bismuth in Microsamples Based on Liquid Spray Dielectric Barrier Discharge Plasma-Induced Vapor Generation. Anal Chem 2018; 91:928-934. [DOI: 10.1021/acs.analchem.8b03966] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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