Simultaneous analysis of catechins, gallic acid, strictinin, and purine alkaloids in green tea by using catechol as an internal standard.

@article{Mizukami2007SimultaneousAO,
  title={Simultaneous analysis of catechins, gallic acid, strictinin, and purine alkaloids in green tea by using catechol as an internal standard.},
  author={Yuzo Mizukami and Yusuke Sawai and Yuichi Yamaguchi},
  journal={Journal of agricultural and food chemistry},
  year={2007},
  volume={55 13},
  pages={4957-64}
}
We developed a high-performance liquid chromatography-based method for simultaneous analysis of nine catechins, gallic acid, strictinin, caffeine, and theobromine in green tea by using catechol as an internal standard. Although the high cost and instability of the catechin reference standards limit the application of this method, the addition of ascorbic acid to the standard stock solution preserved the stability of the reference standards in the solution for 1 year when stored at -30 degrees C… CONTINUE READING