Uncertainty Analysis of Fenazaquin in Tea by HPLC-MSMS Method

To study the uncertainty of fenazaquin in tea，testing process was studied in order to determine the major source of uncertainty.Besides，each component of uncertainty was evaluated and synthesized.Results showed that standard addition recovery and standard working solution preparation uncertainty components were main causes of uncertainty.As the content of fenazaquin was 8.28 μgkg，the expanded uncertainty was 0.40 μgkg.Result of fenazaquin content could be expressed as follows：X=（8.28±0.40）μgkg，k=2，P=95%.