The present invention provides a method of diagnosing multiple disorders and distinguishing there between using a plasma sample obtained from a plasma separator device and analyzing the plasma sample using an LC-MS/MS to detect at least two analyte levels in the plasma sample to diagnose one or more disorders.本發明提供一種診斷多種病症及對其辨別的方法,其係使用自血漿分離器裝置獲得之血漿樣品,及使用LC-MS/MS分析該血漿樣品以偵測該血漿樣品中至少兩種分析物含量以診斷一或多種病症。10‧‧‧LC/MS/MS系統12‧‧‧源頭14‧‧‧孔口16‧‧‧撇渣器18‧‧‧高壓室20‧‧‧Q1室22‧‧‧碰撞室24‧‧‧Q3室26‧‧‧透鏡28‧‧‧偵測器30‧‧‧樣品32‧‧‧許多片段34‧‧‧分離片段36‧‧‧繪圖