Kudo K, et al. - Researchers here examined each step of gas chromatography–mass spectrometry (GC–MS) and attempted to establish a more reliable method to determine the levels of cyanide, thiocyanate, and azide in human whole blood. In addition, they examined the applicability of the established method to NAGINATA–GC–MS screening to determine the levels of the above compounds in human whole blood. In this work, they identified the poisons rapidly with NAGINATA–GC–MS screening without using toxic compounds as reference standards, therefore, it should be useful in forensic and emergency medicine laboratories.