Determination of Ten Corticosteroids in Illegal Cosmetic Products by a Simple, Rapid, and High-Performance LC-MS/MS Method

Table 1

Parameters for SRM acquisition of the corticosteroids.The most abundant product ion.

Analyte	Internal standard	Retention time (min)	ESI	Precursor ion (); M+HCOO or M+H	Product ions ()	Collision energy (eV)
MPD	MPD D2	2.16	neg	419.1		20
			neg		308.9	32
DEX	DEX D4	2.35	neg	437.1		19
			neg		307.0	30
PDL	PDL D6	1.61	neg	405.1		19
			neg		294.9	32
FLA	—	3.30	neg	497.1		21
			neg		354.8	22
FLM	—	2.69	neg	455.1		19
			neg		324.8	30
PDN	—	1.82	neg	403.1		17
			neg		299.1	20
TRM	—	1.24	neg	439.1		23
			neg		325.0	24
TRA	—	2.95	neg	479.1		25
			neg		336.8	19
BCL	—	2.62	neg	453.0		14
			neg		376.9	16
CLP	—	5.14	pos	467.2		10
			pos		373.0	12
DEX D4		2.38	neg	441.1	363.2	20
MPD D2		2.17	neg	421,1	342.8	19
PDL D6		1.61	neg	411.1	333.0	18