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《Journal of Analytical Science》 2012-03
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Simultaneous Determination of p-Hydroxyphenyllactic Acid,3,4-Dihydroxyphenylalanine and 2,5-Dihydroxyphenylacetic Acid in Biological Sample by Derivative Synchronous Fluorescence Spectrometry Using Partial Least-squares Calibration

FENG Lei,WAN Yi-qun(Center of Analysis and Testing,Nanchang University,Nanchang330047)  
A simple,rapid and sensitive method was developed for simultaneous determination of phydroxyphenyllactic acid(PHPLA),3,4-dihydroxyphenylalanine(Dopa)and 2,5-dihydroxyphenylacetic acid(HGA)in this paper.Synchronous fluorescence(SFS)of PHPLA,Dopa and HGA were measured with wavelength interval of 35nm in KH2PO4-NaOH(pH=6.00)buffer medium.The experimental conditions were investigated and the spectra from 260to 325nm were tested,which were processed by derivative partial least square(DPLS).The linear ranges for PHPLA,Dopa and HGA were 0.06~3.00 mg/L,0.06~3.00mg/L and 0.08~3.00mg/L,respectively.The limits of detection for PHPLA,Dopa and HGA were 0.0307,0.0310and 0.0428 mg/L,respectively.The present method was successfully applied to simultaneous determination of PHPLA,Dopa and HGA in culture fluid and there was no significant difference between the results obtained by SFS-DPLS and high performance liquid chromatography.
【CateGory Index】: R446.1;O657.3
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