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Xia J, Zhou J, Liu Y, Yan N, Hu X, Zhou L, Pu Q. Non-destructive distinction of single seed for Medicago sativa and Melilotus officinalis by capillary electrophoresis with laser-induced fluorescence detection. J Chromatogr A 2023; 1704:464116. [PMID: 37290349 DOI: 10.1016/j.chroma.2023.464116] [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: 03/21/2023] [Revised: 05/19/2023] [Accepted: 05/30/2023] [Indexed: 06/10/2023]
Abstract
Flavonoids are a class of natural polyphenolic compounds with great health benefits, and the development of methods for their analysis is of continuing interest. In this work, apigenin, kaempferol and formononetin were selected as the typical representatives of flavone, flavonol and isoflavone, three subclasses of flavonoids. Fluorescence studies revealed that tetraborate complexation could significantly sensitize the weak intrinsic fluorescence of flavonoids in solution, with a maximum of 137-fold for kaempferol. Subsequently, an integrated strategy of derivatization and separation was proposed for the universal analysis of flavonoids by capillary electrophoresis (CE) with 405 nm laser-induced fluorescence (LIF) detection. Using a running buffer consisting of 20 mM sodium tetraborate, 10 mM SDS and 10% methanol (pH 8.5), the dynamic derivatization was realized in the capillary, and the baseline separation was achieved within 10 min, with the detection limits of 0.92-35.46 nM (S/N=3) for the total of 9 flavonoids. The developed CE-LIF method was employed to the quantitative analysis of some flavonoids in Medicago sativa (alfalfa) plants and granulated alfalfa with the recoveries of 80.55-94.25%. Combined with the principal component analysis, the developed method was successfully applied to the non-destructive distinction of single seed for alfalfa and Melilotus officinalis (sweet clover), two forage grass seeds with very similar apparent morphology. Furthermore, this method was used to continuously monitor the substance metabolism during the soaking process at the level of single seed.
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Affiliation(s)
- Jingtong Xia
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Jiahao Zhou
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yanlong Liu
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
| | - Na Yan
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Xiaowen Hu
- College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China.
| | - Lei Zhou
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
| | - Qiaosheng Pu
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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Xia J, Qian M, Zhou J, Wang Z, Li H, Zhou L, Pu Q. Integrated strategy of derivatization and separation for sensitive analysis of salvianolic acids using capillary electrophoresis with laser-induced fluorescence detection. J Chromatogr A 2022; 1685:463607. [DOI: 10.1016/j.chroma.2022.463607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 10/23/2022] [Accepted: 10/26/2022] [Indexed: 11/07/2022]
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3
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Cao L, Wu L, Zhong H, Wu H, Zhang S, Meng J, Li F. Analysis of neurotransmitter catecholamines and related amines in human urine and serum by chromatography and capillary electrophoresis with 1, 3, 5, 7-tetramethyl-8-(N-hydroxysuccinimidyl propionic ester)-difluoro-boradiaza-s-indacene. ACTA CHROMATOGR 2021. [DOI: 10.1556/1326.2021.00924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
AbstractTwo sensitive and effective methods were developed for the detection of catecholamines and related biogenic amines (dopamine, epinephrine, norepinephrine, serotonin, levodopa and tyramine) using high performance liquid chromatography with fluorescence detection and capillary electrophoresis with laser-induced fluorescence detection. A BODIPY fluorescent dye, 1, 3, 5, 7-tetramethyl-8-(N-hydroxysuccinimidyl propionic ester)-difluoroboradiaza- s-indacene was used as pre-column derivatization reagent. The separation and derivatization conditions were optimized in detail. In high performance liquid chromatography with fluorescence detection method, the derivatization reaction was completed at 35 °C for 20 min. At the wavelength of λex/λem = 493 nm/513 nm, dopamine, epinephrine, norepinephrine, and levodopa derivatives achieved baseline separation within 15 min. The limits of detection (S/N = 3) were 1.0, 2.0, 5.0, and 0.5 nmol/L, respectively. In capillary electrophoresis with laser-induced fluorescence detection method, the derivatization reaction was completed at 25 °C for 20 min. Serotonin, tyramine and dopamine derivatives reached baseline separation within 10 min at the wavelength of λex = 473 nm. The limits of detection (S/N = 3) for serotonin, tyramine, and dopamine were 0.3, 0.02, and 0.2 nmol/L, respectively. The amino compounds in human serum and urine samples were detected successfully, and the recoveries were 93.3%–106.7% and 91.0%–103.1%, respectively.
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Affiliation(s)
- Liwei Cao
- Department of Chemistry, College of Chemistry and Materials, Jinan University, Guangzhou, 510632, China
| | - Lizhen Wu
- Department of Chemistry, College of Chemistry and Materials, Jinan University, Guangzhou, 510632, China
| | - Hailan Zhong
- Department of Chemistry, College of Chemistry and Materials, Jinan University, Guangzhou, 510632, China
| | - Hao Wu
- Department of Chemistry, College of Chemistry and Materials, Jinan University, Guangzhou, 510632, China
| | - Siyun Zhang
- Department of Chemistry, College of Chemistry and Materials, Jinan University, Guangzhou, 510632, China
| | - Jianxin Meng
- Department of Chemistry, College of Chemistry and Materials, Jinan University, Guangzhou, 510632, China
| | - Fengyu Li
- Department of Chemistry, College of Chemistry and Materials, Jinan University, Guangzhou, 510632, China
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After enjoying curry: urine metabolism analysis of curcuminoids by microemulsion electrokinetic chromatography with laser-induced native fluorescence detection. J Chromatogr A 2020; 1635:461729. [PMID: 33250162 DOI: 10.1016/j.chroma.2020.461729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 11/14/2020] [Accepted: 11/16/2020] [Indexed: 12/15/2022]
Abstract
Considering pH-dependent fluorescence of curcuminoids, a microemulsion electrokinetic chromatographic (MEEKC) method was developed under acidic conditions for their separation and detection using laser-induced native fluorescence (LINF), so as to solve the analysis of urine metabolism for curcuminoids. The microemulsion composition was optimized by response surface methodology (RSM), and the effects of buffer pH and organic modifiers were systematically investigated. The optimal buffer for the separation of curcuminoids was chosen as follows: 2.8% (v/v) ethyl acetate, 80 mM SDS and 2.8% (v/v) n-butanol to form microemulsion, 28% (v/v) ethanol as organic modifier, and 20 mM phosphoric acid as electrolyte at pH 3.0. Under these conditions, four curcuminoids including curcumin, demethoxy curcumin (DMC), bisdemethoxy curcumin (BDMC) and demethyl curcumin (DEC) could be well separated within 18 min, and the detection limits (LOD, based on S/N=3) were calculated to be 71, 60, 22, and 147 pg mL-1, respectively. Combined with solid-phase extraction (SPE), the developed MEEKC-LINF method has been successfully applied to continuously monitor the curcuminoids and related metabolites in human urine collected from a healthy volunteer after oral administration of curry, testifying that this method has potential for evaluating the pharmacological activity of curcuminoids.
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7-(Diethylamino)coumarin-3-carboxylic acid as derivatization reagent for 405 nm laser-induced fluorescence detection: A case study for the analysis of sulfonamides by capillary electrophoresis. Talanta 2019; 201:16-22. [DOI: 10.1016/j.talanta.2019.03.093] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 03/16/2019] [Accepted: 03/27/2019] [Indexed: 01/12/2023]
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6
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Sensitive analysis of curcuminoids via micellar electrokinetic chromatography with laser-induced native fluorescence detection and mixed micelles-induced fluorescence synergism. J Chromatogr A 2018; 1564:207-213. [DOI: 10.1016/j.chroma.2018.06.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/31/2018] [Accepted: 06/05/2018] [Indexed: 02/06/2023]
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Park M, Bahng SH, Woo N, Kang SH. Highly sensitive wavelength-dependent nonaqueous capillary electrophoresis for simultaneous screening of various synthetic organic dyes. Talanta 2016; 152:236-43. [PMID: 26992516 DOI: 10.1016/j.talanta.2016.02.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 02/01/2016] [Accepted: 02/02/2016] [Indexed: 11/16/2022]
Abstract
A novel multi-wavelength nonaqueous capillary electrophoresis (MW-NACE) technique based on wavelength-dependent laser-induced fluorescence (LIF) detection was investigated for the simultaneous screening of various synthetic organic dyes. Multi-wavelength excitation light sources were utilized to excite different organic dyes [e.g., 543 nm for crystal violet (CV), methyl violet B (MVB), methyl violet B base (MBB), rhodamine 6G (R6G), and rhodamine B base (RBB); 635 nm for nile blue A (NBA) and methylene blue (MB)] simultaneously. Using a nonaqueous buffer system composed of 15 mM sodium borate and 835 mM acetic acid in 100% ethanol (pH=5.4), all dyes were analyzed within 15 min with excellent resolution (R≥4.0) under an electric field of 500 V/cm. Calibration curves showed excellent linearity with square of correlation coefficients (r(2)) greater than 0.9908 over wide dynamic ranges of 0.4-50 μM for CV, 0.8-50 μM for MVB, 1.5-50 μM for MBB, 0.08-5 nM for R6G, 0.06-10 μM for MB, 0.02-10 μM for NBA, and 0.13-10 pM for RBB. The detection limits (S/N=3) of 40 fM to 0.5 μM were 10-200,000 times lower than those of previous detection methods. While adjacent peaks were not well distinguished with baseline separation in a single capillary, the devised technique was faster and more sensitive than conventional aqueous and nonaqueous CE approaches, thereby enabling the quantitative analysis of various dyes based on wavelength-dependent fluorescence detection with different excitation wavelengths.
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Affiliation(s)
- Moonhee Park
- Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Seung-Hoon Bahng
- Criminal Investigation Command of MND, Seoul 04383, Republic of Korea
| | - Nain Woo
- Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Seong Ho Kang
- Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea; Department of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea.
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Wang WF, Ju FR, Ran YL, Zhang HG, Chen XG. Detection of biogenic amines in C57BL/6 mice brain by capillary electrophoresis electrokinetic supercharging. Analyst 2016; 141:956-62. [DOI: 10.1039/c5an01642h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile, sensitive EKS/MEKD-PDAD method was developed for the detection of neurotransmitters in C57BL/6 mice brain.
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Affiliation(s)
- Wei-feng Wang
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
- Department of Chemistry
| | - Fu-rong Ju
- School of Life Science
- Lanzhou University
- Lanzhou 730000
- China
| | - Yan-li Ran
- School of Life Science
- Lanzhou University
- Lanzhou 730000
- China
| | - Hui-ge Zhang
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
- Department of Chemistry
| | - Xing-guo Chen
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
- Department of Chemistry
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Wu D, Yang J, Cai Y, Lin X, Yan J, Li H. Simultaneous Determination of Two Amino Bisphosphonates Drugs by Micellar Electrokinetic Chromatography. J Chromatogr Sci 2015; 53:1794-800. [DOI: 10.1093/chromsci/bmv074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Indexed: 11/13/2022]
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10
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Lin X, Cai Y, Yan J, Zhang L, Wu D, Li H. Determination of Gabapentin in Human Plasma and Urine by Capillary Electrophoresis with Laser-Induced Fluorescence Detection. J Chromatogr Sci 2014; 53:986-92. [DOI: 10.1093/chromsci/bmu134] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Indexed: 11/12/2022]
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11
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Kenndler E. A critical overview of non-aqueous capillary electrophoresis. Part I: Mobility and separation selectivity. J Chromatogr A 2014; 1335:16-30. [DOI: 10.1016/j.chroma.2014.01.010] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 01/07/2014] [Accepted: 01/07/2014] [Indexed: 11/29/2022]
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12
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Anubala S, Sekar R, Nagaiah K. Development and validation of an analytical method for the separation and determination of major bioactive curcuminoids in Curcuma longa rhizomes and herbal products using non-aqueous capillary electrophoresis. Talanta 2014; 123:10-7. [PMID: 24725858 DOI: 10.1016/j.talanta.2014.01.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 01/10/2014] [Accepted: 01/10/2014] [Indexed: 12/31/2022]
Abstract
A simple, fast and efficient non-aqueous capillary electrophoresis method (NACE) was developed for the simultaneous determination of three major bioactive curcuminoids (CMNs) in Curcuma longa rhizomes and its herbal products. Good separation, resolution and reproducibility were achieved with the background electrolyte (BGE) consisting a mixture of 15.0 mM sodium tetraborate and 7.4 mM sodium hydroxide (NaOH) in 2:10:15 (v/v/v) of water, 1-propanol, and methanol. The influences of background electrolyte, sodium hydroxide, water, sodium dodecyl sulfate and hydroxylpropyl-β-cyclodextrin on separations were investigated. The separation was carried out in a fused-silica capillary tube with reverse polarity. Hydrodynamic injection of 25mbar for 12s was used for injecting samples and a voltage of 28 kV was applied for separation. The ultrasonication method was used for the extraction of CMNs from the turmeric herbal products and the extract was filtered and directly injected without any further treatments. The limits of detection and quantification were less than 5.0 and 14.6 µg/ml respectively for all CMNs. The percentage recoveries for CMNs were >97.2% (%RSD, <2.62). The results obtained by the method were compared with existing spectrophotometric and HPLC methods. The related compounds in the extract did not interfere in the determination of CMNs. The proposed NACE method is better than existing chromatographic and electrophoretic methods in terms of simple electrophoretic medium, fast analysis and good resolution.
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Affiliation(s)
- S Anubala
- Natural Product Chemistry Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - R Sekar
- Analytical Chemistry Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500007, India.
| | - K Nagaiah
- Organic and Biomolecular Chemistry Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500007, India.
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13
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Su J, Xu J, Zhong S, Chen L, Li X, Zou H. Analysis of Dye Components in Red Ballpoint Pen Inks by Nonaqueous Micellar Electrokinetic Chromatography with LIF Detection. Chromatographia 2014. [DOI: 10.1007/s10337-013-2619-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Hu H, Li Z, Zhang X, Xu C, Guo Y. Rapid determination of catecholamines in urine samples by nonaqueous microchip electrophoresis with LIF detection. J Sep Sci 2013; 36:3419-25. [PMID: 24038935 DOI: 10.1002/jssc.201300342] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Revised: 07/11/2013] [Accepted: 08/03/2013] [Indexed: 11/06/2022]
Abstract
A method was developed for the rapid separation of catecholamines by nonaqueous microchip electrophoresis (NAMCE) with LIF detection, A homemade pump-free negative pressure sampling device was used for rapid bias-free sampling in NAMCE, the injection time was 0.5 s and the electrophoresis separation conditions were optimized. Under the optimized conditions, the samples were separated completely in <1 min. The average migration times of the epinephrine (E), dopamine (DA), and norepinephrine (NE) were 34.26, 43.81, and 50.07 s, with an RSD of 1.05, 1.26, and 0.89% (n = 7), respectively. The linearity of the method ranged from 0.0125 to 2.0 mg/L for E and 0.025~4.0 mg/L for DA and NE, with correlation coefficients ranging between 0.9978 and 0.9986. The detection limits of E, DA, and NE were 2.5, 5.0, and 5.0 μg/L, respectively. The recoveries of E, DA, and NE in spiked urine samples were between 86 and 103%, with RSDs of 4.5~6.8% (n = 5). The proposed NAMCE with LIF detection combined with a pump-free negative pressure sampling device is a simple, inexpensive, energy efficient, miniaturized system that can be successfully applied for the determination of catecholamines in urine samples.
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Affiliation(s)
- Hongmei Hu
- Key Lab of Mariculture and Enhancement of Zhejiang Province, Marine Fishery Institute of Zhejiang Province, Zhoushan, China
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Buglione L, See HH, Hauser PC. Study on the effects of electrolytes and solvents in the determination of quaternary ammonium ions by nonaqueous capillary electrophoresis with contactless conductivity detection. Electrophoresis 2012; 34:317-23. [DOI: 10.1002/elps.201200397] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 08/22/2012] [Accepted: 08/23/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Lucia Buglione
- Department of Chemistry; University of Basel; Basel; Switzerland
| | | | - Peter C. Hauser
- Department of Chemistry; University of Basel; Basel; Switzerland
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del Pilar Godoy-Caballero M, Galeano-Díaz T, Isabel Acedo-Valenzuela M. Simple and fast determination of phenolic compounds from different varieties of olive oil by nonaqueous capillary electrophoresis with UV-visible and fluorescence detection. J Sep Sci 2012; 35:3529-39. [DOI: 10.1002/jssc.201200696] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 08/27/2012] [Accepted: 08/27/2012] [Indexed: 11/09/2022]
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17
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Liu WL, Hsu YF, Liu YW, Singco B, Chen SW, Huang HY, Chin TY. Capillary electrophoresis-laser-induced fluorescence detection of rat brain catecholamines with microwave-assisted derivatization. Electrophoresis 2012; 33:3008-11. [DOI: 10.1002/elps.201200262] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 07/26/2012] [Accepted: 07/26/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Wan-Ling Liu
- Department of Chemistry and Center for Nanotechnology at CYCU; Chung Yuan Christian University; Chung-Li; Taiwan
| | - Yi-Fen Hsu
- Department of Chemistry and Center for Nanotechnology at CYCU; Chung Yuan Christian University; Chung-Li; Taiwan
| | - Yu-Wei Liu
- Department of Chemistry and Center for Nanotechnology at CYCU; Chung Yuan Christian University; Chung-Li; Taiwan
| | - Brenda Singco
- Department of Chemistry and Center for Nanotechnology at CYCU; Chung Yuan Christian University; Chung-Li; Taiwan
| | - Ssu-Wei Chen
- Department of Chemistry and Center for Nanotechnology at CYCU; Chung Yuan Christian University; Chung-Li; Taiwan
| | - Hsi-Ya Huang
- Department of Chemistry and Center for Nanotechnology at CYCU; Chung Yuan Christian University; Chung-Li; Taiwan
| | - Ting-Yu Chin
- Department of Bioscience Technology at CYCU; Chung Yuan Christian University; Chung-Li; Taiwan
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Ma TY, Vickroy TW, Shien JH, Chou CC. Improved nonaqueous capillary electrophoresis for tetracyclines at subparts per billion level. Electrophoresis 2012; 33:1679-82. [DOI: 10.1002/elps.201100485] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tzu-Yi Ma
- Department of Veterinary Medicine; College of Veterinary Medicine; National Chung Hsing University; Taichung; Taiwan
| | - Thomas W. Vickroy
- Department of Physiological Sciences; College of Veterinary Medicine; University of Florida; Gainesville; FL; USA
| | - Jui-Hung Shien
- Department of Veterinary Medicine; College of Veterinary Medicine; National Chung Hsing University; Taichung; Taiwan
| | - Chi-Chung Chou
- Department of Veterinary Medicine; College of Veterinary Medicine; National Chung Hsing University; Taichung; Taiwan
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Lopez-Gazpio J, Garcia-Arrona R, Ostra M, Millán E. Optimization and validation of a nonaqueous micellar electrokinetic chromatography method for determination of polycyclic musks in perfumes. J Sep Sci 2012; 35:1344-50. [DOI: 10.1002/jssc.201101113] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Development of a non-aqueous capillary electrophoresis method with UV–visible and fluorescence detection for phenolics compounds in olive oil. Anal Bioanal Chem 2012; 403:279-90. [DOI: 10.1007/s00216-012-5799-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Revised: 01/25/2012] [Accepted: 01/26/2012] [Indexed: 01/10/2023]
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21
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Silva M. Micellar electrokinetic chromatography: A practical overview of current methodological and instrumental advances. Electrophoresis 2010; 32:149-65. [DOI: 10.1002/elps.201000344] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 07/27/2010] [Accepted: 07/27/2010] [Indexed: 12/22/2022]
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22
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TENG H, YUAN BQ, YOU TY. Recent Advances in Application of Nonaqueous Capillary Electrophoresis. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2010. [DOI: 10.1016/s1872-2040(09)60078-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Sun H, Lau K, Fung Y. A new capillary electrophoresis buffer for determining organic and inorganic anions in electroplating bath with surfactant additives. J Chromatogr A 2010; 1217:3244-50. [DOI: 10.1016/j.chroma.2010.01.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Revised: 12/24/2009] [Accepted: 01/06/2010] [Indexed: 12/11/2022]
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Gómez-Caravaca AM, Carrasco-Pancorbo A, Segura-Carretero A, Fernández-Gutiérrez A. NACE-ESI-TOF MS to reveal phenolic compounds from olive oil: Introducing enriched olive oil directly inside capillary. Electrophoresis 2009; 30:3099-3109. [DOI: 10.1002/elps.200800798] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Capillary zone electrophoresis hyphenated with laser-induced fluorescence detection for sensitive determination of noradrenaline and dopamine with 5-(4, 6-dichloro-s-triazin-2-ylamino) fluorescein as fluorescent label. Mikrochim Acta 2009. [DOI: 10.1007/s00604-009-0198-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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26
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