Quenching-Chemiluminescence Determination of Trace Amounts of l-Tyrosine Contained in Dietary Supplement by Chemiluminescence Reaction of an Iron-Phthalocyanine Complex.

Journal of Analytical Methods in Chemistry
Takao OhtomoOsamu Ohno

Abstract

The chemiluminescence (CL) signal immediately appeared when a hydrogen peroxide solution was injected into an iron-phthalocyanine tetrasulfonic acid (Fe-PTS) aqueous solution. Moreover, the CL intensity of Fe-PTS decreased by adding l-tyrosine. Based on these results, the determination of trace amounts of l-tyrosine was developed using the quenching-chemiluminescence. The calibration curve of l-tyrosine was obtained in the concentration range of 2.0 × 10(-7) M to 2.0 × 10(-5) M. Moreover, the relative standard deviation (RSD) was 1.63 % (n = 5) for 2.0 × 10(-6) M l-tyrosine, and its detection limits (3σ) were 1.81 × 10(-7) M. The spike and recovery experiments for l-tyrosine were performed using a soft drink. Furthermore, the determination of l-tyrosine was applied to supplements containing various kinds of amino acids. Each satisfactory relative recovery was obtained at 98 to 102%.

References

Aug 18, 2004·Clinica Chimica Acta; International Journal of Clinical Chemistry·Flemming Wibrand
May 26, 2005·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Takeshi KatoShukuro Igarashi
Aug 9, 2005·Luminescence : the Journal of Biological and Chemical Luminescence·Toshimasa NagoshiShukuro Igarashi
Oct 31, 2008·Talanta·M C Sanfeliu AlonsoJ Martínez Calatayud
Oct 20, 2009·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Roman Kand'ár, Pavla Záková
Jul 30, 2010·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Xiashi Zhu, Suqin Xu
Oct 12, 2010·The Analyst·Paul S FrancisNeil W Barnett

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