30 dic 1929 anni - Gas Chromatography-Mass Spectrometry (GC-MS): This analytical technique, though refined later, has its roots in early chemical tests (like the 1836 Marsh test for arsenic) and modern instruments for toxicology and identifying unknown substances.
Aggiunto al nastro di tempo:
Data:
30 dic 1929 anni
Adesso
~ 95 years ago