[Determination of HPLC fingerprint of Qingfengtong capsule].Zhongguo Zhong Yao Za Zhi. 2007 Dec; 32(23):2492-3.ZZ
OBJECTIVE
To establish a fingerprint analysis method of Qingfengtong capsule by HPLC.
METHOD
The samples were extracted with 70% ethanol in an ultrasonic bath. The extracts were analyzed at 35 degrees C on a Diamonsil C18 column (4.6 mm x 250 mm, 5 microm) with 0.1 mol x L(-1) potassium dihydrogen phosphate water-solution as mobile phase A, and methanol as mobile phase B. The analysis followed a linear gradient elution program. Initial condition of the mobile phase was 10% B for 2 minutes; then changed to 90% B in 40 minutes. The flow rate was kept at 1.0 ml x min(-1) and the detector wavelength was 262 nm.
RESULT
The main peaks in fingerprint chromatogram of Qingfengtong capsules were separated fairly well. The results of method validation meet the requirements for the fingerprints.
CONCLUSION
The established method can be used for the quality control of Qingfengtong capsules.