Rapid Screening and Quantitative Analysis of 74 Pesticide Residues in Herb by Retention Index Combined with GC-QQQ-MS/MS

Table 3

Targeted quantitative analysis results of three pesticides in 40 batches of samples (mean, μg/kg).

Samples	Procymidone	Chlorpyrifos	Fipronil
CX01	94.77	ND	ND
CX02	47.11	ND	ND
CX03	60.75	ND	ND
CX04	42.89	ND	ND
CX05	29.91	ND	ND
CX06	71.73	ND	ND
CX07	49.85	ND	ND
CX08	31.75	ND	ND
CX09	ND	485.92	ND
CX10	28.25	ND	ND
CX11	56.13	ND	ND
CX12	56.95	ND	ND
CX13	2841.54	ND	ND
CX14	ND	ND	ND
CX15	69.50	ND	ND
CX16	159.29	ND	ND
CX17	35.61	ND	ND
CX18	ND	ND	28.62
CX19	3712.16	ND	ND
CX20	77.30	ND	ND
CX21	64.58	ND	ND
CX22	ND	ND	193.12
CX23	ND	ND	ND
CX24	61.62	ND	38.28
CX25	44.16	ND	ND
CX26	77.72	ND	ND
CX27	ND	ND	64.21
CX28	71.27	ND	ND
CX29	ND	ND	ND
CX30	142.19	ND	ND
CX31	66.31	ND	ND
CX32	81.09	ND	ND
CX33	ND	ND	ND
CX34	ND	ND	ND
CX35	57.36	ND	ND
CX36	82.61	ND	ND
CX37	ND	ND	ND
CX38	ND	ND	ND
CX39	85.36	ND	ND
CX40	96.77	ND	ND

ND represents that the limit of detection has not been reached.