Objective: To establish a quantitative analysis method for pyrroloquinoline quinone(PQQ) by high per?formance liquid chromatography(HPLC). Methods: The PQQ standard and fermentation sample were dissolved with 10 mmol/L NaOH solution and analyzed by HPLC method. PQQ was seperated on a Waters XBridge C18 col?umn(4.6 mm×150 mm,5 μm) with a gradient mobile phase(methanol and water, pH was adjusted to 1.0 by triflu?oroacetic acid) at 1.0 mL/min flow rate. The detective wavelength was 365.8 nm. Results: The retention time of PQQ standard was about 7.8 min and the linear correlation coefficient was above 0.9999 from 0.03125 to 1 mg/mL. The average recovery rate was 98.6%. Conclusion: HPLC was a reliable quantitive method in determination of PQQ with high sensitivity and accuracy.
high performance liquid chromatographypyrroloquinoline quinoneanalysis method