Linearity, LOD and LOQ for the six OPPs in stand water samples (n = 6).

Analyte	Linearity range (μg L−1)	r	LOD (μg L−1)	LOQ (μg L−1)	RSD %
Trichlorfon	2∼500	0.9990	0.58	1.96	4.6
Ethoprophos	0.5∼500	0.9994	0.18	0.62	1.2
Dimethoate	1∼500	0.9993	0.32	1.06	3.4
Fenitrothion	1∼500	0.9992	0.21	0.68	2.8
Parathion	0.5∼500	0.9998	0.26	0.88	1.2
Fenthion	1∼500	0.9995	0.12	0.41	4.2