1
|
Robert-Peillard F, Chottier C, Coulomb B, Boudenne JL. Simple and ultrasensitive microplate method for spectrofluorimetric determination of trace resorcinol. Microchem J 2015. [DOI: 10.1016/j.microc.2015.04.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
2
|
Ameen S, Akhtar MS, Seo HK, Shin HS. High sensitivity Schottky junction diode based on monolithically grown aligned polypyrrole nanofibers: Broad range detection of m-dihydroxybenzene. Anal Chim Acta 2015; 886:165-74. [PMID: 26320649 DOI: 10.1016/j.aca.2015.05.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 05/12/2015] [Accepted: 05/26/2015] [Indexed: 12/01/2022]
Abstract
Aligned p-type polypyrrole (PPy) nanofibers (NFs) thin film was grown on n-type silicon (100) substrate by an electrochemical technique to fabricate Schottky junction diode for the efficient detection of m-dihydroxybenzene chemical. The highly dense and well aligned PPy NFs with the average diameter (∼150-200 nm) were grown on n-type Si substrate. The formation of aligned PPy NFs was confirmed by elucidating the structural, compositional and the optical properties. The electrochemical behavior of the fabricated Pt/p-aligned PPy NFs/n-silicon Schottky junction diode was evaluated by cyclovoltametry (CV) and current (I)-voltage (V) measurements with the variation of m-dihydroxybenzene concentration in the phosphate buffer solution (PBS). The fabricated Pt/p-aligned PPy NFs/n-silicon Schottky junction diode exhibited the rectifying behavior of I-V curve with the addition of m-dihydroxybenzene chemical, while a weak rectifying I-V behavior was observed without m-dihydroxybenzene chemical. This non-linear I-V behavior suggested the formation of Schottky barrier at the interface of Pt layer and p-aligned PPy NFs/n-silicon thin film layer. By analyzing the I-V characteristics, the fabricated Pt/p-aligned PPy NFs/n-silicon Schottky junction diode displayed reasonably high sensitivity ∼23.67 μAmM(-1)cm(-2), good detection limit of ∼1.51 mM with correlation coefficient (R) of ∼0.9966 and short response time (10 s).
Collapse
Affiliation(s)
- Sadia Ameen
- Energy Materials & Surface Science Laboratory, Solar Energy Research Center, School of Chemical Engineering, Chonbuk National University, Jeonju, 561-756, Republic of Korea
| | - M Shaheer Akhtar
- New & Renewable Energy Materials Development Center (NewREC), Chonbuk National University, Jeonbuk, Republic of Korea
| | - Hyung-Kee Seo
- Energy Materials & Surface Science Laboratory, Solar Energy Research Center, School of Chemical Engineering, Chonbuk National University, Jeonju, 561-756, Republic of Korea
| | - Hyung Shik Shin
- Energy Materials & Surface Science Laboratory, Solar Energy Research Center, School of Chemical Engineering, Chonbuk National University, Jeonju, 561-756, Republic of Korea.
| |
Collapse
|
3
|
Nalewajko-Sieliwoniuk E, Malejko J, Mozolewska M, Wołyniec E, Nazaruk J. Determination of polyphenolic compounds in Cirsium palustre (L.) extracts by high performance liquid chromatography with chemiluminescence detection. Talanta 2015; 133:38-44. [DOI: 10.1016/j.talanta.2014.05.062] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 05/02/2014] [Accepted: 05/12/2014] [Indexed: 10/25/2022]
|
4
|
Hudari FF, de Almeida LC, da Silva BF, Zanoni MVB. Voltammetric sensor for simultaneous determination of p-phenylenediamine and resorcinol in permanent hair dyeing and tap water by composite carbon nanotubes/chitosan modified electrode. Microchem J 2014. [DOI: 10.1016/j.microc.2014.05.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
5
|
Arceusz A, Wesolowski M, Konieczynski P. Methods for Extraction and Determination of Phenolic Acids in Medicinal Plants: A Review. Nat Prod Commun 2013. [DOI: 10.1177/1934578x1300801238] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Phenolic acids constitute a group of potentially immunostimulating compounds. They occur in all medicinal plants and are widely used in phytotherapy and foods of plant origin. In recent years, phenolic acids have attracted much interest owing to their biological functions. This paper reviews the extraction and determination methods of phenolic acids in medicinal plants over the last 10 years. Although Soxhlet extraction and ultrasonic assisted extraction (UAE) are commonly used for the extraction of phenolic acids from plant materials, alternative techniques such as supercritical fluid extraction (SFE), and accelerated solvent extraction (ASE) can also be used. After extraction, phenolic acids are determined usually by liquid chromatography (LC) owing to the recent developments in this technique, especially when it is coupled with mass spectrometry (MS). Also detection systems are discussed, including UV-Vis, diode array, electrochemical and fluorimetric. Other popular techniques for the analysis of this group of secondary metabolites are gas chromatography coupled with mass spectrometry (GC-MS) and capillary electrophoresis (CE).
Collapse
Affiliation(s)
- Agnieszka Arceusz
- Department of Analytical Chemistry, Medical University of Gdansk, 80-416 Gdansk, Poland
| | - Marek Wesolowski
- Department of Analytical Chemistry, Medical University of Gdansk, 80-416 Gdansk, Poland
| | - Pawel Konieczynski
- Department of Analytical Chemistry, Medical University of Gdansk, 80-416 Gdansk, Poland
| |
Collapse
|
6
|
Zhang A, Wan L, Wu C, Fang Y, Han G, Li H, Zhang Z, Wang H. Simultaneous determination of 14 phenolic compounds in grape canes by HPLC-DAD-UV using wavelength switching detection. Molecules 2013; 18:14241-57. [PMID: 24252994 PMCID: PMC6269983 DOI: 10.3390/molecules181114241] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 11/07/2013] [Accepted: 11/13/2013] [Indexed: 11/16/2022] Open
Abstract
The paper described a novel chromatographic method for the simultaneous determination of phenolic compounds such as gallic, protocatechuic, vanillic, caffeic, syringic, p-coumaric and salicylic acid, (+)-catechin, (‒)-epicatechin, rutin, morin, quercetin, coumarin and trans-resveratrol at their maximum absorbance wavelengths (MAW) employing reverse-phase high performance liquid chromatography combined with DAD and UV detection via detection wavelength switching. The method was based on MAW acquisition by DAD and quantification by UV. The separation process was performed on a Shim-Pack VP-ODS C18 column (250 mm × 4.6 mm, 5 μm) held at 30 °C, utilizing 3.0% acetic acid and acetonitrile as mobile phase at a flow rate of 0.8 mL/min in the gradient elution mode. The method was fully validated in terms of linearity (r2 > 0.9990, 10‒350 mg/L), precision (both intra-day and inter-day RSD < 4.22%), accuracy (97.31%‒104.66%), specificity, robustness (0.59% < RSD < 2.86%), limit of detection and quantification. The switching method significantly improved the sensitivities of most phenolics studied in comparison with the standard constant wavelength detection (280 nm). The proposed method has been successfully applied to the determination of 14 phenolic compounds in 89 varieties of one-year-old Chinese grape one-year-canes. Grape canes contain many phenolics, especially trans-resveratrol, (‒)-epicatechin, and (+)-catechin.
Collapse
Affiliation(s)
- Ang Zhang
- College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China; E-Mails: (A.Z.); (L.W.); (G.H.); (H.L.); (Z.Z.); (H.W.)
- Shaanxi Engineering Research Center for Viti-Viniculture, Yangling 712100, Shaanxi, China
| | - Li Wan
- College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China; E-Mails: (A.Z.); (L.W.); (G.H.); (H.L.); (Z.Z.); (H.W.)
- Shaanxi Engineering Research Center for Viti-Viniculture, Yangling 712100, Shaanxi, China
| | - Cuiyun Wu
- College of Plant Science, Tarim University, Alaer 843300, Xinjiang, China; E-Mail:
| | - Yulin Fang
- College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China; E-Mails: (A.Z.); (L.W.); (G.H.); (H.L.); (Z.Z.); (H.W.)
- Shaanxi Engineering Research Center for Viti-Viniculture, Yangling 712100, Shaanxi, China
- Author to whom correspondence should be addressed; E-Mail: ; Tel./Fax: +86-29-8709-1874
| | - Guomin Han
- College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China; E-Mails: (A.Z.); (L.W.); (G.H.); (H.L.); (Z.Z.); (H.W.)
- Shaanxi Engineering Research Center for Viti-Viniculture, Yangling 712100, Shaanxi, China
| | - Hua Li
- College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China; E-Mails: (A.Z.); (L.W.); (G.H.); (H.L.); (Z.Z.); (H.W.)
- Shaanxi Engineering Research Center for Viti-Viniculture, Yangling 712100, Shaanxi, China
| | - Zhenwen Zhang
- College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China; E-Mails: (A.Z.); (L.W.); (G.H.); (H.L.); (Z.Z.); (H.W.)
- Shaanxi Engineering Research Center for Viti-Viniculture, Yangling 712100, Shaanxi, China
| | - Hua Wang
- College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China; E-Mails: (A.Z.); (L.W.); (G.H.); (H.L.); (Z.Z.); (H.W.)
- Shaanxi Engineering Research Center for Viti-Viniculture, Yangling 712100, Shaanxi, China
| |
Collapse
|
7
|
Li S, Qian L, Zhu Y, Liu M, Gao Y, Ni Y. Enhanced chemiluminescence of cerium(IV)-Tween 85 system and the analytical application. LUMINESCENCE 2013; 28:948-53. [PMID: 23281191 DOI: 10.1002/bio.2464] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 11/02/2012] [Accepted: 11/10/2012] [Indexed: 11/05/2022]
Abstract
The oxidation reaction between cerium(IV) and Tween 85 in sulfuric acid medium produced weak chemiluminescence (CL). In this paper, it was found that citrate could strongly enhance the CL of cerium(IV)-Tween 85-polyphenol system. Based on studies of ultraviolet-visible spectra and CL spectra, the CL enhancement mechanism had been proposed. It was surmised that the light emission was from an excited oxygen molecular pair O2((1)Δg)O2((1)∑g(-)). The maximum emission wavelength was about 478 nm. The effects of 17 amino acids and 29 organic compounds on cerium(IV)-Tween 85-citrate CL were investigated by a flow injection procedure. This study showed the present system had a wide application for the determination of these compounds.
Collapse
Affiliation(s)
- Shifeng Li
- College of Chemistry and Materials Science, Anhui Key Laboratory of Functional Molecular Solids, Anhui Key Laboratory of Molecule-based Materials, Anhui Normal University, Wuhu, 241000, People's Republic of China
| | | | | | | | | | | |
Collapse
|
8
|
Jafari M, Badihi Z, Jazan E. A new approach to determine salicylic acid in human urine and blood plasma based on negative electrospray ion mobility spectrometry after selective separation using a molecular imprinted polymer. Talanta 2012; 99:520-6. [DOI: 10.1016/j.talanta.2012.06.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 06/12/2012] [Accepted: 06/13/2012] [Indexed: 11/28/2022]
|
9
|
Nalewajko-Sieliwoniuk E, Nazaruk J, Kotowska J, Kojło A. Determination of the flavonoids/antioxidant levels in Cirsium oleraceum and Cirsium rivulare extracts with cerium(IV)-rhodamine 6G chemiluminescence detection. Talanta 2012; 96:216-22. [PMID: 22817953 DOI: 10.1016/j.talanta.2012.02.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 02/09/2012] [Accepted: 02/15/2012] [Indexed: 10/28/2022]
Abstract
The determination of the sum of flavonoid compounds in extracts from inflorescences (expressed as mgL(-1) of apigenin) and leaves (expressed as mgL(-1) of linarin) of Cirsium oleraceum and Cirsium rivulare species by flow injection system with chemiluminescence detection (FI-CL) has been carried out. The method is based on the strong enhancement by polyphenols occurring in both plants of the CL signal generated by the reaction of cerium(IV) with rhodamine 6G in a sulfuric acid medium. Under the optimized conditions, the linear working ranges of 0.1-10 and 2.5-50μmolL(-1) were obtained for apigenin and linarin, respectively. The developed method is simple, sensitive with the detection limits of 38nmolL(-1) (apigenin) and 840nmolL(-1) (linarin) and offers high sample throughput (up to 300 samples per hour). The relative standard deviation was 0.62% and 3.75% for 10 measurements of 5μmolL(-1) apigenin and linarin, respectively. The proposed method has been successfully applied to determine the flavonoids/antioxidant levels in aqueous and methanolic extracts from inflorescences and leaves of C. oleraceum and C. rivulare. A possible mechanism of the enhancement of cerium(IV)-rhodamine 6G CL system by polyphenols was briefly discussed. For comparative studies, the antioxidant activity of C. oleraceum and C. rivulare extracts was also evaluated by spectrophotometric 1,1-diphenyl-2-picryl-hydrazyl (DPPH) radical scavenging method.
Collapse
|
10
|
Al Lawati HA, Al Gharibi E, Al Kindy SM, Suliman FEO, Al-Lawati AM. High throughput method for the analysis of cetrizine hydrochloride in pharmaceutical formulations and in biological fluids using a tris(2,2′-bipyridyl)ruthenium(II)–peroxydisulphate chemiluminescence system in a two-chip device. Talanta 2011; 85:906-12. [DOI: 10.1016/j.talanta.2011.04.072] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2011] [Revised: 04/28/2011] [Accepted: 04/28/2011] [Indexed: 11/26/2022]
|
11
|
Adcock JL, Barrow CJ, Barnett NW, Conlan XA, Hogan CF, Francis PS. Chemiluminescence and electrochemiluminescence detection of controlled drugs. Drug Test Anal 2010; 3:145-60. [PMID: 21154734 DOI: 10.1002/dta.236] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2010] [Revised: 10/22/2010] [Accepted: 10/23/2010] [Indexed: 11/10/2022]
Abstract
We review the determination of various controlled drugs (opioids, tranquilizers, stimulants, and hallucinogens) using flow-analysis methodologies (flow injection analysis, high performance liquid chromatography, capillary electrophoresis, and microfluidic devices) with chemiluminescence and electrochemiluminescence reagents such as luminol, diaryloxalates, tris(2,2'-bipyridine)ruthenium(II), permanganate, manganese(IV), and sulfite, for industrial, clinical, pharmaceutical, and forensic science applications.
Collapse
Affiliation(s)
- Jacqui L Adcock
- School of Life and Environmental Sciences, Deakin University, Geelong, Victoria 3217, Australia
| | | | | | | | | | | |
Collapse
|
12
|
A review on applications of chemiluminescence detection in food analysis. Anal Chim Acta 2010; 670:1-10. [DOI: 10.1016/j.aca.2010.04.039] [Citation(s) in RCA: 135] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Revised: 04/21/2010] [Accepted: 04/22/2010] [Indexed: 11/18/2022]
|
13
|
Coupling HPLC to on-line, post-column (bio)chemical assays for high-resolution screening of bioactive compounds from complex mixtures. Trends Analyt Chem 2009. [DOI: 10.1016/j.trac.2009.03.009] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
14
|
Gámiz-Gracia L, García-Campaña AM, Huertas-Pérez JF, Lara FJ. Chemiluminescence detection in liquid chromatography: Applications to clinical, pharmaceutical, environmental and food analysis—A review. Anal Chim Acta 2009; 640:7-28. [DOI: 10.1016/j.aca.2009.03.017] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Revised: 03/12/2009] [Accepted: 03/12/2009] [Indexed: 10/21/2022]
|
15
|
Karim MM, Alam SM, Lee SH. Application of a lanthanide composite nanoparticle-sensitized luminescence method for the determination of salicylic acid in pharmaceutical formulations and human plasma. LUMINESCENCE 2009; 23:417-23. [PMID: 18816464 DOI: 10.1002/bio.1072] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Terbium-acetylacetone (Tb-acac) composite nanoparticles were synthesized using the ultrasonic method. The nanoparticles are water-soluble, stable and have extremely narrow emission bands and high internal quantum efficiencies. They were used as fluorimetric probes in the determination of salicylic acid (SA), based on the fluorescence enhancement of nanoparticles through fluorescence resonance energy transfer (FRET). The influence of buffer solution was investigated. Under the optimum conditions, a linear calibration graph was obtained over the SA concentration range 5 x 10(-7)-1 x 10(-4) mol/L. The limit of detection was found to be 2.5 x 10(-8) mol/L. The relative standard deviation (RSD) for six repeated measurements of 1 x 10(-4) mol/LSA was 1.75%. The method was applied to the determination of SA in pharmaceutical formulations and human plasma. We believe that the proposed approach has great potential for clinical purposes.
Collapse
|
16
|
Zhou YZ, Liu XX, Zheng XH, Zheng JB. Simultaneous Determination of Quercetin and Luteolin in Dried Flowers by Multivariate HPLC-ECD Calibration. Chromatographia 2007. [DOI: 10.1365/s10337-007-0363-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
17
|
Zheng JB, Liu XX, Zhou YZ, Suo ZR. Simultaneous Determination of Five Phenolic Compounds in Dried Flowers by LC Using DAD Combined Electrochemical Detection. Chromatographia 2007. [DOI: 10.1365/s10337-007-0218-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
18
|
Fan J, Zhang T, Sun J, Fan M. Kinetic Fluorimetric Measurement of Trace Resorcinol1 in Phenol Mixtures. J Fluoresc 2006; 17:113-8. [PMID: 17031570 DOI: 10.1007/s10895-006-0128-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2006] [Accepted: 08/28/2006] [Indexed: 10/24/2022]
Abstract
A kinetic spectrofluorimetric method was studied to measure the concentration of trace resorcinol. The proposed method is based on the inhibitory effect of resorcinol on the oxidation of rhodamine B by potassium bromate in the medium of dilute sulfuric acid. The detection limit and linear range of the proposed resorcinol measurement method are 12 microg L(-1) and 24 approximately 280 microg L(-1), respectively. Relative standard derivations of eleven measurements for 80 microg L(-1) and 200 microg L(-1) resorcinol solutions are 2.12% and 1.08%, respectively. The trace of resorcinol can be determined directly by the proposed method without any pre-separation process when phenol and many other phenolic compounds are present.
Collapse
Affiliation(s)
- Jing Fan
- School of Chemical and Environmental Science, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007 Henan, People's Republic of China.
| | | | | | | |
Collapse
|
19
|
Karim MM, Lee HS, Kim YS, Bae HS, Lee SH. Analysis of salicylic acid based on the fluorescence enhancement of the As(III)–salicylic acid system. Anal Chim Acta 2006; 576:136-9. [PMID: 17723625 DOI: 10.1016/j.aca.2006.02.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2005] [Revised: 02/01/2006] [Accepted: 02/01/2006] [Indexed: 11/27/2022]
Abstract
A new, simple and sensitive spectrofluorimetric method for the determination of salicylic acid (lambda(ex)=315 nm, lambda(em) = 408 nm) using As(III) as a sensitizing reagent has been investigated by measuring the increase of fluorescence intensity of salicylic acid due to the complexation of As(III)-salicylic acid in presence of sodium dodecyl sulfate (SDS) 10(-3) M. Under optimum conditions, a significant relationship was obtained between the fluorescence intensity and salicylic acid concentration. A linear calibration curve was obtained in the range 13.8-13812 microg l(-1) with product-moment correlation coefficient (R) 0.99985 and detection limit 4.2 microg l(-1). The R.S.D. is 2.35% (n=5). The method was applied successfully to the determination of salicylic acid in human serum.
Collapse
Affiliation(s)
- Mohammad Mainul Karim
- Department of Chemistry, Kyungpook National University, Taegu 702-701, Republic of Korea
| | | | | | | | | |
Collapse
|
20
|
Tsogas GZ, Giokas DL, Vlessidis AG, Evmiridis NP. The effects of solvent preoxidation on inhibited chemiluminescence of pyrogallol oxidation in flow injection analysis and liquid chromatography. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2006.02.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
21
|
Haghighi B, Dadashvand R. Flow injection chemiluminescence analysis of phenolic compounds using the NCS-luminol system. Anal Bioanal Chem 2006; 384:1246-53. [PMID: 16485089 DOI: 10.1007/s00216-005-0267-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2005] [Revised: 12/01/2005] [Accepted: 12/04/2005] [Indexed: 10/25/2022]
Abstract
A flow injection system coupled with two simple and sensitive chemiluminescence (CL) methods is described for the determination of some phenolic compounds. The methods are based on the inhibition effects of the investigated phenols on the CL signal intensities of N-chlorosuccinimide-KI-luminol (NCS-KI-luminol) and NCS-luminol systems. The influences of the chemical and hydrodynamic parameters on the decrease in CL signal intensities of NCS-KI-luminol and NCS-luminol systems for hydroquinone, catechol, and resorcinol, serving as the model compounds of analyte, were studied in the flow injection mode of analysis. Under the selected conditions, the proposed CL systems were used for the determination of some phenolic compound and analytical characteristics of the systems including calibration equation, correlation coefficient, linear dynamic range, limit of detection, and sample throughput. The limits of detection for hydroquinone, catechol, and resorcinol were 0.002, 0.01, and 0.3 microM using the NCS-KI-luminol system; for the NCS-luminol system these were 0.01, 0.17, and 1.6 microM, respectively. The relative standard deviation for 10 repeated measurements of 0.04, 0.06, and 1 microM of hydroquinone, catechol, and resorcinol were 1.9, 1.4, and 2.0%, respectively, with the NCS-KI-luminol system; for 0.2, 0.5, and 4 microM of hydroquinone, catechol, and resorcinol these were 2.6, 2.2, and 3.7%, respectively, using the NCS-luminol system. The method was applied to the determination of catechol in known environmental water samples with a relative error of less than 6%. A possible reaction mechanism of the proposed CL system is discussed briefly.
Collapse
Affiliation(s)
- Behzad Haghighi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences, 45195-1159 Zanjan, Iran.
| | | |
Collapse
|
22
|
Tsogas GZ, Giokas DL, Vlessidis AG, Evmiridis NP. Sensitivity enhancement of liquid chromatographic–direct chemiluminescence detection by on-line post-column solvent mediated pre-oxidative chemiluminescence. J Chromatogr A 2006; 1107:208-15. [PMID: 16426625 DOI: 10.1016/j.chroma.2005.12.087] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2005] [Revised: 12/19/2005] [Accepted: 12/20/2005] [Indexed: 10/25/2022]
Abstract
The compatibility of liquid chromatography solvents with oxidizing reagents frequently employed in direct chemiluminescence reactions is examined in this study. Various oxidizing reagents were examined for their response in hydro-organic and micellar mobile phases in both isocratic and gradient elution modes. Mild oxidants like hydrogen peroxide, periodate, cerium and hypochlorite were found to be completely compatible with common reversed phase HPLC solvents posing as no threat to the detection procedure. On the other hand, stronger oxidants like acidic permanganate were found to oxidize organic solvents towards the production of an intense light signal. Although several analytical applications can emerge from this finding, the conjunction of this system with reversed phase HPLC is impractical owing to a significant baseline increase which deteriorates the sensitivity of the analysis. A convenient solution to this problem is proposed based on the regulated on-line post-column pre-oxidation of the organic solvent (SPOC) with mild oxidants that have no influence on the final signal. The analytical utility of this new approach in the determination of organic compounds after chromatographic separation is demonstrated.
Collapse
Affiliation(s)
- George Z Tsogas
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | | | | | | |
Collapse
|
23
|
Zhang Q, Cui H, Myint A, Lian M, Liu L. Sensitive determination of phenolic compounds using high-performance liquid chromatography with cerium(IV)-rhodamine 6G-phenolic compound chemiluminescence detection. J Chromatogr A 2005; 1095:94-101. [PMID: 16275288 DOI: 10.1016/j.chroma.2005.08.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2005] [Revised: 07/28/2005] [Accepted: 08/01/2005] [Indexed: 10/25/2022]
Abstract
A simple, selective and sensitive determination method of 20 phenolic compounds has been developed using high-performance liquid chromatography (HPLC) with chemiluminescence detection. The method is based on the chemiluminescent enhancement by phenolic compound of the cerium(IV)-rhodamine 6G system in sulfuric acid medium. Twenty phenolic compounds were separated on a XDB-C(8) column with a gradient elution using a mixture of methanol and 1.0% acetic acid as a mobile phase. Under the optimized conditions, a linear working range extends 2 orders of magnitude with the relative standard deviations of intra- and inter-day precision below 4.0%, and the detection limits (S/N = 3) were in the range of 1.5-82.1 ng/ml. The chemiluminescence reaction was compatible with the mobile phase of high-performance liquid chromatography. The proposed method has been successfully applied to the assay of phenolic compounds in red wine without any pretreatment.
Collapse
Affiliation(s)
- Qunlin Zhang
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui
| | | | | | | | | |
Collapse
|
24
|
Wan GH, Cui H, Zheng HS, Zhou J, Liu LJ, Yu XF. Determination of tetracyclines residues in honey using high-performance liquid chromatography with potassium permanganate–sodium sulfite–β-cyclodextrin chemiluminescence detection. J Chromatogr B Analyt Technol Biomed Life Sci 2005; 824:57-64. [PMID: 16009603 DOI: 10.1016/j.jchromb.2005.06.039] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2005] [Revised: 06/15/2005] [Accepted: 06/22/2005] [Indexed: 10/25/2022]
Abstract
A novel method was developed for the simultaneous determination of tetracycline antibiotic (TCA) residues such as oxytetracycline (OTC), tetracycline (TC), and metacycline (MTC) by high-performance liquid chromatography (HPLC) coupled with chemiluminescence (CL) detection. The procedure was based on the chemiluminescent enhancement by TCAs of the potassium permanganate-sodium sulfite-beta-cyclodextrin system in a phosphoric acid medium. The separation was carried out with an isocratic elution using a mixture of acetonitrile and 0.001 M phosphoric acid. For the three TCAs, the detection limits at a signal-to-noise of 3 ranged from 0.9 to 5.0 ng/ml. The relative standard deviations for the determination of TCAs ranged from 3.1 to 7.4% within a day (n=11) and ranged from 2.2 to 8.6% in 3 days (n=9), respectively. The method was successfully applied to the determination of TCA residues in honey samples. The possible mechanism of the CL reaction was also discussed.
Collapse
Affiliation(s)
- Guo-Hui Wan
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | | | | | | | | | | |
Collapse
|