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Mohandoss S, Khanal HD, Palanisamy S, You S, Shim JJ, Lee YR. Multiple heteroatom-doped photoluminescent carbon dots for ratiometric detection of Hg 2+ ions in cell imaging and environmental applications. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:635-642. [PMID: 35080218 DOI: 10.1039/d1ay02077c] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Photoluminescence detection and imaging of Hg2+ ions in the biochemical living system are of great importance. In this study, a new photoluminescent probe based on nitrogen (N), sulfur (S), and boron (B) multiple heteroatom co-doped carbon dots (NSB-CDs) is synthesized for the ratiometric detection of Hg2+ ions. The prepared NSB-CDs possess good aqueous solubility, excellent pH and ionic stability, excitation dependency, and high quantum yield (QY = 17.6%). The ratiometric photoluminescent sensor NSB-CDs exhibit high selectivity, sensitivity, and interference towards Hg2+ ions over other metal ions. After adding Hg2+ ions, the emission intensity of the NSB-CDs exhibits a large redshift from 452 to 496 nm (up to 44 nm), corresponding to a notable change from blue to green emission in aqueous solutions. The association constant (Ka), the limit of detection (LOD), and the limit of quantification (LOQ) for NSB-CDs/Hg2+ complex are calculated to be 3.6 × 104 M-1, 3.1 × 10-9 M, and 10.4 × 10-9 M, respectively, in the range of 0-30 × 10-6 M. The live cell bioimaging of HCT-116 cells with NSB-CDs validates the application of multicolor imaging for the detection of Hg2+ ions in aqueous media and biological systems. Moreover, the potential use of the NSB-CDs/Hg2+ complex for real sample analysis is demonstrated.
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Affiliation(s)
- Sonaimuthu Mohandoss
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea.
| | - Hari Datta Khanal
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea.
| | - Subramanian Palanisamy
- Department of Marine Food Science and Technology, Gangneung-Wonju National University, 120 Gangneungdaehangno, Gangneung, Gangwon 25457, Republic of Korea
| | - SangGuan You
- Department of Marine Food Science and Technology, Gangneung-Wonju National University, 120 Gangneungdaehangno, Gangneung, Gangwon 25457, Republic of Korea
| | - Jae-Jin Shim
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea.
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea.
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Ngororabanga JMV, Moyo CB, Tshentu ZR. A novel multidentate pyridyl ligand: A turn-on fluorescent chemosensor for Hg 2+ and its potential application in real sample analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 242:118651. [PMID: 32795949 DOI: 10.1016/j.saa.2020.118651] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/22/2020] [Accepted: 06/23/2020] [Indexed: 06/11/2023]
Abstract
A novel pyridyl-based ligand with multiple binding sites was developed as potential turn on fluorescent probe for mercuric ion. In comparison with other transition metal ions, the ligand displayed a significant optical selectivity and sensitivity for Hg2+ in aqueous solution with a remarkable fluorescence enhancement. The obtained spectroscopic response was related to the inhibition of the photo-chemical mechanism known as photo-induced electron transfer (PET) in the ligand and CN isomerization by Hg2+ binding. A good linearity between fluorescence responses and Hg2+ concentration was obtained in the range 3.3 × 10-9 M-1.6 × 10-8 M and a nanomolar level limit of detection (LOD) (1.4 × 10-9 M ~ 0.28 ppb) and limit of quantification (LOQ) (4.8 × 10-9 M ~ 0.93 ppb) were obtained. Both LOD and LOQ values are very low compared to the reported permissible Hg2+ level in drinking water (2 ppb) by US Environmental Protection Agency (EPA). The possible binding mode between ligand and Hg2+ were determined using Job's plot analysis and density functional theory (DFT) calculations and a complex with 1:1 stoichiometric ratio was suggested. The response of the pyridyl ligand upon Hg2+ addition was noted to be fast without any time delay and reversible. The performance of the ligand at nanomolar level of Hg2+ and real sample application of the proposed method was investigated and satisfactory results were obtained.
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Affiliation(s)
| | - Cyprian B Moyo
- Department of Chemistry, Nelson Mandela University, Port Elizabeth 6031, South Africa
| | - Zenixole R Tshentu
- Department of Chemistry, Nelson Mandela University, Port Elizabeth 6031, South Africa.
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Roy R, Rakshit S, Bhar S, Chandra Bhattacharya S. A colorimetric and turn-on fluorescent chemosensor for selective detection of Hg2+: theoretical studies and intracellular applications. RSC Adv 2015. [DOI: 10.1039/c5ra06582h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
A new colorimetric, “turn-on” fluorescent chemosensor (DEAS-BPH) was synthesized for selective and sensitive recognition of Hg2+ ions with no interference from environmentally relevant metal ions in a mixed organo-aqueous medium.
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Affiliation(s)
- Rimi Roy
- Department of Chemistry
- Organic Chemistry Section
- Jadavpur University
- Kolkata 700 032
- India
| | - Soumyadipta Rakshit
- Department of Chemistry
- Physical Chemistry Section
- Jadavpur University
- Kolkata 700 032
- India
| | - Sanjay Bhar
- Department of Chemistry
- Organic Chemistry Section
- Jadavpur University
- Kolkata 700 032
- India
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Xu F, Kou L, Jia J, Hou X, Long Z, Wang S. Metal–organic frameworks of zeolitic imidazolate framework-7 and zeolitic imidazolate framework-60 for fast mercury and methylmercury speciation analysis. Anal Chim Acta 2013; 804:240-5. [DOI: 10.1016/j.aca.2013.09.058] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 09/25/2013] [Accepted: 09/28/2013] [Indexed: 10/26/2022]
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5
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Li BH. Rapid speciation analysis of by short column capillary electrophoresis on-line coupled with inductively coupled plasma mass spectrometry. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2011; 3:116-121. [PMID: 32938120 DOI: 10.1039/c0ay00480d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A method for mercury high throughput rapid speciation analysis was developed by short column capillary electrophoresis (SC-CE) coupled with inductively coupled plasma mass spectrometry (ICP-MS). A MicroMist nebulizer was employed to increase the nebulization efficiency and a laboratory-made removable SC-CE-ICP-MS interface on the basis of cross design was applied to alleviate buffer contamination of ICP-MS. In less than 60 s, methylmercury (MeHg(i)) and inorganic mercury (Hg(ii)) were separated in a 16 × 75 μm i.d. short fused-silica capillary at 21 kV, while a mixture of 30 mmol L-1 boric acid + 5% (v/v) CH3OH (pH = 8.60) acted as running electrolyte. The precisions (RSD, n = 5) of migration time and peak area for MeHg(i) and Hg(ii) were in the range of 1.4-2.6% and 3.3-3.4%, respectively. The limits of detection (3σ) mercury species were 9.7 μg L-1 and 12.0 μg L-1, respectively. The recoveries for Hg(ii) and MeHg(i) were in the range of 96-107% and 99-105%.
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Affiliation(s)
- Bao-Hui Li
- College of Environmental Science & Engineering, North China Electric Power University, 619 Yonghua North Street, Baoding City, 071003, China.
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6
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Zhang C, Guo S, Huang C. Determination of Compositions in Cosmetics by Multiple-Instrument. ACTA ACUST UNITED AC 2011. [DOI: 10.4236/ajac.2011.28098] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Capillary electrophoretic separation and post-column electrochemical detection of mercury and methyl mercury and applications to coal samples. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2009.02.100] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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8
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Li P, Duan J, Hu B. High-sensitivity capillary electrophoresis for speciation of organomercury in biological samples using hollow fiber-based liquid-liquid-liquid microextraction combined with on-line preconcentration by large-volume sample stacking. Electrophoresis 2008; 29:3081-9. [DOI: 10.1002/elps.200700920] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kubán P, Houserová P, Kubán P, Hauser PC, Kubán V. Sensitive capillary electrophoretic determination of mercury species with amperometric detection at a copper electrode after cation exchange preconcentration. J Sep Sci 2007; 30:1070-6. [PMID: 17566342 DOI: 10.1002/jssc.200600476] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A capillary electrophoretic method for the separation of four mercury species with amperometric detection was developed. Inorganic Hg2+, methyl-, ethyl-, and phenyl-mercury were complexed with L-cysteine and separated in a counterelectroosmotic mode in an electrolyte solution comprised of 20 mM sodium tetraborate at pH 9.5. Amperometric detection of separated species was achieved at passivated copper electrode under electrocatalytic oxidation conditions. The four mercury species were separated in less than 8 min with LODs ranging from 170 to 450 microg/L. Cation exchange preconcentration was used to decrease the LODs down to 1.7 microg/L.
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Affiliation(s)
- Petr Kubán
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Brno, Czech Republic.
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Abstract
CE methods for the speciation of inorganic and organomercury compounds are reviewed. Sample preparation, separation conditions and detection modes are discussed. Efficient separation and sensitive determination of mercury species by CE typically involves complexation with various thiols, chromogenic and other chelating agents; however, some methods do not require complexation. Spectrophotometric detection based on UV-visible absorption is by far the most commonly used. Hyphenated techniques, such as CE/inductively coupled plasma (ICP)-MS, hydride generation coupled to ICP-MS or atomic fluorescence spectrometry and CE/atomic absorption spectrometry are gaining popularity due to their high sensitivity and selectivity. Last, but not least, the potential and applications of electrochemical methods for detection of separated mercury species are outlined.
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Affiliation(s)
- Petr Kubán
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Brno, Czech Republic.
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Gupta V, Ali I, Aboul-Enein HY. Chapter 3 Metal ions speciation in the environment: Distribution, toxicities and analyses. CONCEPTS AND APPLICATIONS IN ENVIRONMENTAL GEOCHEMISTRY 2007. [DOI: 10.1016/s1474-8177(07)05003-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Houserová P, Kubán P, Kubán V. Ion exchange preconcentration and separation of mercury species by CE with indirect contactless conductometric detection. Electrophoresis 2006; 27:4508-15. [PMID: 17066384 DOI: 10.1002/elps.200600274] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Capillary electrophoretic separation of four mercury species (inorganic Hg(2+), methyl-, ethyl-, and phenylmercury) was achieved in less than 8 min with an electrolyte consisting of 150 mM 2-amino-2-methyl-propanol (AMP) at pH 11.6. The analytes were complexed with 0.1% mercaptopropionic acid (MPA), separated in counter-EOF as anionic complexes, and detected by a contactless conductometric detector. Ion exchange preconcentration with on-column formation of MPA-mercury complexes was developed. Preconcentration factors of 25-150 were achieved and LODs in the range of 2.9-6.9 ng/mL were feasible. This method may prove to be applicable as a rapid screening method for mercury speciation in environmental samples.
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Affiliation(s)
- Pavlína Houserová
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Brno, Czech Republic
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Peng ZL, Qu F, Song G, Lin JM. Simultaneous separation of organomercury species by nonaqueous capillary electrophoresis using methanol containing acetic acid and imidazole. Electrophoresis 2005; 26:3333-40. [PMID: 16097026 DOI: 10.1002/elps.200500163] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A simple and rapid nonaqueous capillary electrophoresis method for simultaneous separation of four kinds of mercury species, namely inorganic mercury, methylmercury, ethylmercury, and phenylmercury, is reported. The effective mobilities of organomercury in aqueous and nonaqueous electrolytes were compared. Imidazole was confirmed not only as a co-ion for the separation but also as an online complexing reagent for mercury species. The optimum conditions for separation were achieved by using methanol solvent containing 0.15 M acetic acid and 15 mM imidazole as electrolyte. The sensitive detection of mercury species was accomplished at 191 nm.
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Affiliation(s)
- Zhen-Lei Peng
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
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Trojanowicz M, Poboży E, Gübitz G. Speciation of oxidation states of elements by capillary electrophoresis. J Sep Sci 2003. [DOI: 10.1002/jssc.200301451] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
The growing awareness of the strong development of the toxicity of heavy metals upon their chemical forms has led to an increasing interest in the qualitative and quantitative determination of specific metal species. Speciation has therefore become an important topic of present-day analytical research. The development in the elemental speciation analysis by capillary electrophoresis (CE) is reviewed. Various CE separation modes and detection techniques applied are discussed. A comprehensive description of reported methods to date in CE speciation analysis including metals, metalloids and nonmetallic elements is demonstrated. Some examples are presented to demonstrate CE's ability to solve real-world speciation analysis with emphasis on the applications in biological and environmental samples. Further, some issues concerning the limitations and the future of CE with regard to speciation studies are also discussed.
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Affiliation(s)
- Yan-Ming Liu
- Department of Chemistry, Wuhan University, Wuhan, P. R. China
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16
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Timerbaev AR. Element speciation analysis by capillary electrophoresis: what are the hints on becoming a standard analytical methodology? Anal Chim Acta 2001. [DOI: 10.1016/s0003-2670(01)00788-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Abstract
Recent advances in the design and application of electrochemical (EC) detection systems in capillary electrophoresis (CE) are reviewed, with the objective of providing the nonelectrochemist with a state-of-the-art picture of CEEC instrumentation and an overview of the principal analytes for which CEEC is best suited. The detection schemes considered here include those based both on amperometry and on potentiometry as both kinds of EC systems are being actively developed in CE and have the potential for broad application in analysis. Over the three-year period covered by this review, an important direction that CEEC has taken is the construction of more complex electrode systems beginning with the use of multiple EC electrodes and culminating with the adaptation of EC detection to microfabricated "lab-on-a-chip" analysis devices. In addition, CEEC applications have now grown to include a broad variety of inorganic, organic, and biochemical analytes and samples.
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Affiliation(s)
- R P Baldwin
- Department of Chemistry, University of Louisville, KY 40292, USA.
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Abstract
Advances in the fundamental studies and methodology of capillary electrophoresis (CE) as applied to metal ion analysis over the last two years are reviewed, with the objective of providing the interested reader with a state-of-the-art picture of technique's potentialities in the area. In particular, novel strategies for separation selectivity control and CE system innovations designed to enhance the detection sensitivity are described. In addition, a brief overview of the primary metal analytes and samples for which the technique appears to be best suited is given. The current limitations of the technique regarding most of all the implementation for routine use are considered along with the approaches on how they could be addressed. Finally, some pointers as to the likely trends in the future research are discussed.
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Affiliation(s)
- A R Timerbaev
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow.
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20
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Determination of mercury compounds by capillary electrophoresis inductively coupled plasma mass spectrometry with microconcentric nebulization. Anal Chim Acta 2000. [DOI: 10.1016/s0003-2670(00)00807-2] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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23
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Field-portable capillary electrophoresis instrument with potentiometric and amperometric detection. Anal Chim Acta 1999. [DOI: 10.1016/s0003-2670(99)00149-x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Valsecchi SM, Polesello S. Analysis of inorganic species in environmental samples by capillary electrophoresis. J Chromatogr A 1999; 834:363-85. [PMID: 10189695 DOI: 10.1016/s0021-9673(98)00914-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The use of capillary electrophoresis for the determination of inorganic species in environmental samples is reviewed. Topics covered include the separation of inorganic anions, inorganic cations, transition metal cations and organometals in different environmental matrices, such as atmospheric deposition, atmospheric aerosols, gases, natural waters, waste waters, soil, sediment and marine biological samples. Cited literature is gathered according to the type of matrix, so that the focus is on the discussion of matrix effects rather than on the method development for a single class of compounds. For each matrix, surveyed methods are tabulated in order to assist the method selection. Innovative applications of capillary electrophoresis to advanced environmental research are also emphasised.
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Kappes T, Hauser PC. Electrochemical detection methods in capillary electrophoresis and applications to inorganic species. J Chromatogr A 1999. [DOI: 10.1016/s0021-9673(98)00685-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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27
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Timerbaev AR, Buchberger W. Prospects for detection and sensitivity enhancement of inorganic ions in capillary electrophoresis. J Chromatogr A 1999. [DOI: 10.1016/s0021-9673(98)00913-3] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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