. Author manuscript; available in PMC: 2020 Sep 16.

Published in final edited form as: Southeast Asian J Trop Med Public Health. 2020 May 19;51(1):77–87.

Table 1.

Retention time, range of calibration, limit of detection (LOD) and regression coefficient of standard organophosphate pesticides in spiked meconium control samples analyzed by gas chromatograph-mass spectrometry.

	Retention time (min)	Range of calibration (μg/g)	LOD (μg/g)	Regression coefficient (r²)
Chlorpyrifos	21.7	0.06–1.28	0.02	0.995
Demeton-s-methyl	17.5	0.13–2.56	0.05	0.997
Dichlorvos	14.6	0.32–6.41	0.20	0.997
Dimethoate	18.5	0.13–2.56	0.07	0.995
Ethion	26.0	0.13–2.56	0.04	0.999
Malathion	21.5	0.13–2.56	0.06	0.999
Omethoate	17.2	1.92–12.82	0.48	0.997
Pirimiphos-methyl	21.2	0.06–1.28	0.04	0.995
Pyrazophos	28.5	0.32–6.41	0.14	0.996
Tolclofos-methyl	20.6	0.06–1.28	0.03	0.996