The calibration curve of the individula standards was construcred using six concentration (n=3) by plotting peak areas against the concentration of analytes. Good linearity was observed in calibfation curves over the concentration ranges investigated. LOD of MFA and MFB were 0.28 and 0.12 ng ml,respectively,and LOQ were 0.93 and 0.41 ng ml,respectively. The results are summarised in Table1.