Determination of Levels of Organochlorine, Organophosphorus, and Pyrethroid Pesticide Residues in Vegetables from Markets in Dar es Salaam by GC-MS

Table 1

List of pesticide standards/analytes with retention times and selected masses used as references in the GC-MS analysis.

Standards	Retention time	Quantification mass (m/z)	Qualifying ions (m/z)
α-HCH	17.38	181	51–145, 183–254
β-HCH	18.55	109	51–85, 145–254
γ-HCH	18.74	181	51–156, 183–254
δ-HCH	19.77	181	51–156, 183–254
Aldrin	22.83	66	79–293
o,p′-DDE	25.595	246	75–210, 248–318
α-Endosulfan	25.715	241	50–239, 243–339
Dieldrin	26.69	79	81–263
p,p′-DDE	26.78	246	75–210, 248–320
o,p′-DDD	27.07	235	88–199, 237, 239
β-Endosulfan	27.825	195	53–193, 197–339
p,p′-DDD	28.295	235	82–199, 237, 239
o,p′-DDT	28.38	235	75–199, 237, 239
p,p′-DDT	29.62	235	82–199, 237, 239
Fenitrothion	22.53	125	47, 79, 93, 109, 277
Chlorpyrifos	23.34	97	47, 65, 125–314
Pirimiphos methyl	22.68	290	56–276, 305
Cypermethrin	37.17	163	51–129, 165–209