TABLE 1.

Low- and high-energy channel ions queried in the UHPLC-QTOF-MS data files for each common benzodiazepine [M + H]⁺: protonated molecule.

Low-energy channel ions
m0	[M + H]+
m1	Isotope with one 13C
m2	If Br in molecular formula: isotope with one 81Br
	If Cl(s) and not Br in molecular formula: isotope with one 37Cl
	If halogens not in molecular formula: isotope with two 13C
High-energy channel
f0	[M + H]+
f1	First diagnostic fragment ion
f2	Second diagnostic fragment ion
f3	Third diagnostic fragment ion
f4	Fourth diagnostic fragment ion