keywords: Organochlorine, organophosphate, irish potato, hazard, maximum residue limit, concentration
This study aimed to assess the levels of organochlorine pesticide (OCPs) and organophosphate (OPPs) residues in irish potato in Mangu local government of Plateau state. Liquid-liquid extraction (LLE) method was used for extraction of pesticides from irish potatoes from Mangu town, Ampang and Bwai and subjected to gas chromatography coupled to an electron capture detector (GC-ECD) for the detection and quantification of the pesticides. From the result of this research, concentrations of DDT detected in Ampang and Bwai were 4.3650 mg/kg and 4.0443 mg/kg respectively; DDVP found in Ampang and Bwai were 0.0542 mg/kg and 0.0791 mg/kg respectively; endosulfan detected in Mangu town was 0.2439 mg/kg while carbofuran and heptachlor detected in Mangu town were 1.5902 mg/kg and 0.1362 mg/kg respectively and were found to be above the maximum residue limits (MRLs) set by WHO/FAO for Irish potato hence, the need for continuous monitoring. While the concentration of dichlorvos confirmed in Mangu town and Ampang were 0.0089mg/kg and 0.0004 mg/kg respectively; g-chlordane detected in Ampang was 0.0033 mg/kg while at Bwai it was 0.1970 mg/kg; lindane found in Mangu town was 0.0385 mg/kg; Aldrin detected in Ampang was 0.0564 mg/kg. From the result shown, the concentrations of these pesticides are below the maximum residue limits (MRLs) set by WHO/FAO. As a result of this, consumption of irish potatoes from Mangu town, Ampang, and Bwai do not constitute health hazard. On the other hand, the concentration of g-chlordane, DDT, DDVP, aldrin in Mangu town; lindane, HCB, endosulfan, profenfos, carbofuran in Ampang and lindane, HCB, endosulfan, profenfos, carbofuran, and heptachlor in Bwai were below the limit of detection.