Ion-exclusion chromatography determination of organic acid in uridine 5'-monophosphate fermentation broth.

Huanqing Niu, Yong Chen, Jingjing Xie, Xiaochun Chen, Jianxin Bai, Jinglan Wu, Dong Liu, Hanjie Ying

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Life Science and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210009, People's Republic of China.

Journal of chromatographic science 2012 Sep

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Simultaneous determination of organic acids using ion-exclusion liquid chromatography and ultraviolet detection is described. The chromatographic conditions are optimized when an Aminex HPX-87H column (300 × 7.8 mm) is employed, with a solution of 3 mmol/L sulfuric acid as eluent, a flow rate of 0.4 mL/min and a column temperature of 60°C. Eight organic acids (including orotic acid, α-ketoglutaric acid, citric acid, pyruvic acid, malic acid, succinic acid, lactic acid and acetic acid) and one nucleotide are successfully quantified. The calibration curves for these analytes are linear, with correlation coefficients exceeding 0.999. The average recovery of organic acids is in the range of 97.6% ∼ 103.1%, and the relative standard deviation is in the range of 0.037% ∼ 0.38%. The method is subsequently applied to obtain organic acid profiles of uridine 5'-monophosphate culture broth fermented from orotic acid by Saccharomyces cerevisiae. These data demonstrate the quantitative accuracy for nucleotide fermentation mixtures, and suggest that the method may also be applicable to other biological samples.

Citation

Huanqing Niu, Yong Chen, Jingjing Xie, Xiaochun Chen, Jianxin Bai, Jinglan Wu, Dong Liu, Hanjie Ying. Ion-exclusion chromatography determination of organic acid in uridine 5'-monophosphate fermentation broth. Journal of chromatographic science. 2012 Sep;50(8):709-13