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Zhao RJ, Jiang Q, Sun W, Jiao K. Electropolymerization of Methylene Blue on Carbon Ionic Liquid Electrode and Its Electrocatalysis to 3,4-Dihydroxybenzoic Acid. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200900022] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Dai X, Moffat JG, Mayes AG, Reading M, Craig DQM, Belton PS, Grandy DB. Thermal Probe Based Analytical Microscopy: Thermal Analysis and Photothermal Fourier-Transform Infrared Microspectroscopy Together with Thermally Assisted Nanosampling Coupled with Capillary Electrophoresis. Anal Chem 2009; 81:6612-9. [DOI: 10.1021/ac9004869] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xuan Dai
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, Norfolk NR4 7TJ, U.K., and IPTME, Loughborough University, Loughborough, Leicestershire, LE11 3TU, U.K
| | - Jonathan G. Moffat
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, Norfolk NR4 7TJ, U.K., and IPTME, Loughborough University, Loughborough, Leicestershire, LE11 3TU, U.K
| | - Andrew G. Mayes
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, Norfolk NR4 7TJ, U.K., and IPTME, Loughborough University, Loughborough, Leicestershire, LE11 3TU, U.K
| | - Mike Reading
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, Norfolk NR4 7TJ, U.K., and IPTME, Loughborough University, Loughborough, Leicestershire, LE11 3TU, U.K
| | - Duncan Q. M. Craig
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, Norfolk NR4 7TJ, U.K., and IPTME, Loughborough University, Loughborough, Leicestershire, LE11 3TU, U.K
| | - Peter S. Belton
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, Norfolk NR4 7TJ, U.K., and IPTME, Loughborough University, Loughborough, Leicestershire, LE11 3TU, U.K
| | - David B. Grandy
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, Norfolk NR4 7TJ, U.K., and IPTME, Loughborough University, Loughborough, Leicestershire, LE11 3TU, U.K
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Dabek-Zlotorzynska E, Piechowski M. Application of CE with novel dynamic coatings and field-amplified sample injection to the sensitive determination of isomeric benzoic acids in atmospheric aerosols and vehicular emission. Electrophoresis 2007; 28:3526-34. [PMID: 17828799 DOI: 10.1002/elps.200700109] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A simple and reliable CE method with direct UV detection has been developed to separate eight isomeric benzoic acids in atmospheric aerosols and vehicular emission without complex sample pretreatment. Optimal electrophoretic conditions, with migration times under 5 min, were obtained by using a 50 mM acetate buffer (pH 4.7) containing a dynamic surface coating EOTrol LN (0.005% w/v). The separations were carried out in a cathode to anode direction (-30 kV) allowing the low cathodal EOF ( approximately 1 x 10(-9) m(2)V(-1)s(-1)) to extend the effective separation by slowing the movement of the studied aromatic acids. Moreover, the sensitivity of the method at 200 nm was enhanced by using a field-amplified sample injection (FASI) with electrokinetic (EK) sample injection (-2 kV, 60 s). Prior to sample injection, a short water plug (3 s at 0.5 psi) was introduced. Under these conditions, the method was capable of detecting the analytes in deionized water with LODs (S/N = 3) as low as 0.1 microg/L for most of the studied acids. In the presence of 10 mg/L of sulphate (added to simulate a sample matrix), LODs ranged from 0.26 to 0.62 microg/L. The validation of the method has proven an excellent separation performance and accuracy for the determination of isomeric benzoic acids in the studied matrices.
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Affiliation(s)
- Ewa Dabek-Zlotorzynska
- Analysis and Air Quality, Environmental Science and Technology Centre, Science and Technology Branch, Environment Canada, 335 River Road, Ottawa, Ontario, Canada.
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Abstract
A comprehensive overview of the analysis of low-molecular-mass organic acids employing electromigration methods in the capillary format is given. This review includes papers published since 2003 and can be seen as an update of the review paper published by Galli et al. in 2003. Tables included in this review contain application papers describing the determination of organic acids from a variety of fields like the analysis of food and beverages, environmental samples, samples from clinical origin, and from natural products.
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Affiliation(s)
- Christian W Klampfl
- Institute of Analytical Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, A-4040 Linz, Austria.
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