Determination of 20 Neonicotinoid Insecticides and Their Metabolites in Infant Foods by a Modified QuEChERS Method Combined with HPLC-MS/MS

Table 1

Mass spectrometry parameters for the analysis of 20 neonicotinoids and their metabolites.

Analytes	Precursor ions (m/z)	Product ions (m/z)	CE (V)	Retention time (min)
IMI	256.1	209.1, 175.1	−14, −17	6.25
5-OH-IMI	272.1	225.1, 134.1	−15, −41	5.42
6-CHL	158.0	122.0, 51.1	−21, −36	6.74
NTP	271.1	126.0, 225.0	−26, −16	4.77
ACE	223.1	126.1, 56.1	−22, −15	6.40
DM-ACE	209.1	126.0, 90.1	−17, −33	5.95
IM-1-4	157.1	126.1, 73.0	−15, −44	1.82
THA	253.0	126.1, 99.0	−20, −43	7.09
IMIT	262.0	181.1, 122.1	−17, −30	6.43
CYC	323.1	151.1, 276.1	−22, −15	5.56
THX	292.0	211.1, 181.1	−11, −23	5.41
CLO	250.0	169.0, 131.9	−10, −14	5.91
DM-CLO	236.0	132.0, 113.0	−13, −26	5.63
DNT	203.1	129.1, 113.1	−12, −10	3.75
DN	158.1	102.1, 57.1	−17, −25	1.51
UF	159.1	102.1, 67.1	−13, −18	2.12
SUL	278.1	174.0, 154.0	−8, −28	7.15
FLO	230.1	203.0, 173.8	−16, −19	7.29
TFNG	249.0	148.0, 128.0	−33, −35	4.74
TFNA-AM	191.0	98.1, 73.1	−30, −31	3.93

Quantitation ion.