A Simple and Quick Method for the Determination of Pesticides in Environmental Water by HF-LPME-GC/MS

Table 4

Analyses of pesticides in real environmental water samples (spring water, stream 1, and stream 2).

Pesticide	Average () concentrations (µg L^−1)			Permitted value (µg L^−1)
	Spring water	Stream 1	Stream 2
Parathion-methyl	0.06	0.08	0.15	35
Chlorpyrifos	ND	ND	ND	x
Captan	ND	ND	ND	x
Procymidone	ND	ND	ND	x
α-Endosulfan	0.16	ND	0.20	0.2
Prothiofos	ND	ND	ND	x
Cyproconazole	ND	ND	ND	x
Ethion	0.30	0.31	ND	x
Triazophos	0.17	0.14	0.16	x
Phosmet	ND	ND	ND	x

Below LOQ. ND: not detected. Regulation 357/2005. Ministry of Environment: pesticide levels in surface water in Brazil. x: not regulated by Brazilian legislation.