the repeatability was assessed by analysing five independently prepared extraction solutions of Ziyang green tea samples.
During this period,the solution was stored at room temperature
2.6 Establishment of HPLC fingerprint and similarity analysis
To establish the representative chromatographic fingerprint,ten batches of Ziyang green tea samples were analysed under the established HPCL method.
the obtained HPLC data from ten batches of Ziyang green tea samples were exported from waters empower 2 software in AIA format and imported to the professional software named similarity evaluation system for chromatographic fingerprint of tradition chinese medicine (version 2004A) (Ma et al., 2011).
this system could reflect the similarity of distribution ratio of the chemical composition accurately, which was recommended by SFDA.