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Abstract
Currently, the development of a new method for the analysis of glyoxylic acid in selective oxidation of glyoxal system has become a key subject in its new industrial process development. Since solid phase extraction (SPE) could isolate and concentrate desired analytes from complex matrices, in this paper we tested the possibility of coupling SPE technique with HPLC for simultaneous determination of glyoxylic acid, formic acid, and oxalic acid in this complex chemical reaction system. Results demonstrated that the developed method could be successfully applied to this system, after samples were passed through SAX cartridges and yielded recoveries from 96.7% to 103%. The limits of detection were 2.6 × 10−6, 3.6 × 10−6, and 3.5 × 10−7 mol L−1, respectively; and their linear ranges between 1 × 10−6 and 1 × 10−2 mol L−1.
This work was supported by Huayi (Group) Company (No. F100-80710), Shanghai Committee of Science and Technology (08142200603, 08PJ14040), Scientific Research Foundation for Returned Scholars, Ministry of Education of China (No.[2008]890), and National Nature Science Foundation of China (No. 20627005, 20805015). Authors also thank Shanghai Chemical Reagent Research Institute for their supports in sample preparation.
Notes
a LC-UV conditions as in Experimental.
b Where Y and X represent peak areas and the concentration of the analyte (mol/L), respectively.
c The detection limits are calculated according to 3σ, where σ is the standard deviation of a blank solution (n = 11).
a The values shown are calculated from the calibration curves and are mean of n = 3 in each case. (means ± S.E.M.).
b LC-UV conditions as in experimental.