30 déc. 1929 - 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.
Ajouté au bande de temps:
Date:
30 déc. 1929
Maintenaint
~ Il y a 95 ans