If the GCMS fingerprint of a sample matches that of heroin or cocaine, it is nearly impossible for even the best defense lawyer to challenge the result successfully.

• 如果样品透过气相层析质谱分析仪呈现出来的特徵，符合海洛因或古柯碱，那麽就算是请到王牌辩护律师，也不可能成功打败这样的结果。