Copyright (c) 2014 AJC
This work is licensed under a Creative Commons Attribution 4.0 International License.
Vortex-Assisted Surfactant-Enhanced Emulsification Microextraction Combined with High Performance Liquid Chromatography-Fluorescence Detector for Determination of Nitrite in Urine
Corresponding Author(s) : Li Bi
Asian Journal of Chemistry,
Vol. 26 No. 21 (2014): Vol 26 Issue 21
Abstract
A vortex-assisted surfactant-enhanced emulsification microextraction (VASEME) combined with high performance liquid chromatography-fluorescence detector (HPLC-FLD) procedure was developed for the determination of trace nitrite in human urine. The method is based on the selective reaction of nitrite with o-phenylenediamine in acid media to form benzotriazole, which exhibited strong fluorescence at 568 nm with excitation at 420 nm in alkaline medium. The fluorescence of system was enhanced by hydroxypropyl-b-cyclodextrin (HP-b-CD) through complexation. The nonionic surfactant Triton X-114 was adopted as emulsifier and n-octanol as the extraction solvent and vortex-mix was applied to assist emulsification in vortex-assisted surfactant-enhanced emulsification microextraction. Under the optimal conditions: the linearity was observed in the range of 4 to 80 ng/mL and the correlation coefficient ( r) was 0.996. The relative standard deviations were below 3.7 % (n = 5). The limit of detection (LOD) based on a signal-to-noise ratio (S/N) of 3 was 0.08 ng/mL and a signal-to-noise ratio (S/N) of 10 the quantification limits (LOQ) was 0.314 ng/mL. Good recoveries (³ 85 %) were obtained when the proposed method was applied to determine nitrite in human urine samples.
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G.Y. Wu and M. Morris, Biochem. J., 336, 1 (1998).
M.D.I. Ehrén, M.D.H. Iversen, M.D.O. Jansson, M.D.J. Adolfsson and M.D.N.P. Wiklund, Urology, 44, 683 (1994); doi:10.1016/S0090-4295(94)80206-8.
E.M. Fock, V.T. Bachteeva, E.A. Lavrova, S.D. Nikolaeva and R.G. Parnova, Cell Tissue Biol., 2, 516 (2008); doi:10.1134/S1990519X0805009X.
S. Moncada, R.M.J. Palmer and E.A. Higgs, Pharmacol. Rev., 43, 109 (1991).
M. Kelm and K. Yoshida, in eds: M. Feelisch and J. Stamler, Methods in Nitric Oxide Research, John Wiley & Sons, Chichester, pp. 47-58 (1996).
J.O.N. Lundberg, S. Carlsson, L. Engstrand, E. Morcos, N.P. Wiklund and E. Weitzberg, Urology, 50, 189 (1997); doi:10.1016/S0090-4295(97)00257-4.
A. Afkhami, T. Madrakian and A. Maleki, Anal. Biochem., 347, 162 (2005); doi:10.1016/j.ab.2005.09.018.
X.F. Yue, Z.Q. Zhang and H.T. Yan, Talanta, 62, 97 (2004); doi:10.1016/S0039-9140(03)00421-1.
L. Wang, J. Chen, H. Chen, C. Zhou, B. Ling and J. Fu, J. Lumin., 131, 83 (2011); doi:10.1016/j.jlumin.2010.09.003.
Q.H. Liu, X.L. Yan, J.C. Guo, D.H. Wang, L. Li, F.Y. Yan and L.G. Chen, Spectrochim. Acta A, 73, 789 (2009); doi:10.1016/j.saa.2009.03.018.
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H. Li, C.J. Meininger and G. Wu, J. Chromatogr. B Biomed. Sci. Appl., 746, 199 (2000); doi:10.1016/S0378-4347(00)00328-5.
W.S. Jobgen, S.C. Jobgen, H. Li, C.J. Meininger and G. Wu, J. Chromatogr. B, 851, 71 (2007); doi:10.1016/j.jchromb.2006.07.018.
M.D. Croitoru, J. Chromatogr. B, 911, 154 (2012); doi:10.1016/j.jchromb.2012.11.006.
J. Hsu, J. Arcot and N. Alice Lee, Food Chem., 115, 334 (2009); doi:10.1016/j.foodchem.2008.11.081.
M.I. Helaleh and T. Korenaga, J. Chromatogr. B Biomed. Sci. Appl., 744, 433 (2000); doi:10.1016/S0378-4347(00)00264-4.
D.C. Siu and A. Henshall, J. Chromatogr. A, 804, 157 (1998); doi:10.1016/S0021-9673(97)01245-4.
P. Niedzielski, I. Kurzyca and J. Siepak, Anal. Chim. Acta, 577, 220 (2006); doi:10.1016/j.aca.2006.06.057.
S. Kage, K. Kudo and N. Ikeda, J. Chromatogr. B Biomed. Sci. Appl., 742, 363 (2000); doi:10.1016/S0378-4347(00)00189-4.
D. Tsikas, R.H. Böger, S.M. Bode-Böger, F.M. Gutzki and J.C. Frölich, J. Chromatogr. B Biomed. Sci. Appl., 661, 185 (1994); doi:10.1016/0378-4347(94)00374-2.
M.C. Boyce, Electrophoresis, 22, 1447 (2001); doi:10.1002/1522-2683(200105)22:8<1447::AID-ELPS1447>3.0.CO;2-#.
L. He, K. Zhang, C. Wang, X. Luo and S. Zhang, J. Chromatogr. A, 1218, 3595 (2011); doi:10.1016/j.chroma.2011.04.014.
W. Utermahlen Jr., D. Mellini and H. Issaq, J. Liq. Chromatogr. Rel. Technol., 15, 3315 (1992); doi:10.1080/10826079208020886.
M. Zhang, D. Yuan, G. Chen, Q. Li, Z. Zhang and Y. Liang, Mikrochim. Acta, 165, 427 (2009); doi:10.1007/s00604-009-0158-y.
N. Pourreza, M.R. Fat'hi and A. Hatami, Microchem. J., 104, 22 (2012); doi:10.1016/j.microc.2012.03.026.
H. Filik, D. Giray, B. Ceylan and R. Apak, Talanta, 85, 1818 (2011); doi:10.1016/j.talanta.2011.07.052.
Y.X. Guo, Q.F. Zhang, X. Shangguang and G. Zhen, Spectrochim. Acta A, 101, 107 (2013); doi:10.1016/j.saa.2012.09.083.