[Re-study on characteristic fingerprint of volatile oil from Herba Pogostemonis by GC].

OBJECTIVE

To establish the characteristic fingerprint and parameter of volatile oil from Herba Pogostemonis.

METHODS

The dffferent collecting time and county samples of Herba Pogostemonis were determined by GC.

RESULTS

Accuracy, stability and repeatability of the method were good. The same region samples had good stability and main constituents were same in different collection time, but content were different. The samples collected from different region were more different in constituents and content.

CONCLUSION

The 11 components in common buildup the characterisitic fingerprint of volatile oil from Herba Pogostemonis. The ratiio of pogostone to patchoulic alcohol were used index parameter for quality evaluation and characteristics of producing region.