International Journal of Analytical Chemistry

Research Article

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

Table 4

Mean concentrations (±SD) of pesticide residues in onions (mg/kg).
SiteSamplep,p′-DDDα-Endosulfanβ-EndosulfanChlorpyrifosCypermethrin
KkoO1NDNDNDNDND
O2() × 10−2NDNDNDND
O3() × 10−2NDND() × 10−3
BgnO4() × 10−3NDND() × 10−2
O5() × 10−3NDNDNDND
O6NDNDNDNDND
MnyO7NDNDNDNDND
O8NDNDNDNDND
O9NDNDNDNDND
TmkO10() × 10−3NDNDNDND
O11ND() × 10−1() × 10−2NDND
O12() × 10−3() × 10−1() × 10−2ND
ND: not detected.