scholarly journals Determination of Organochlorine Pesticide Residues in Dried Cocoa

2016 ◽  
Vol 54 ◽  
pp. 8-16
Author(s):  
Oladele Abiodun Olaniran ◽  
Ebenezer Oyerinde Ajiboye ◽  
Timothy Abiodun Adebayo ◽  
Samuel Adelani Babarinde ◽  
Haleema Omolola Adedosu ◽  
...  
Keyword(s):  
Organochlorine Pesticide ◽  
Pesticide Residues ◽  
Gas Chromatography Mass Spectrometry ◽  
Human Consumption ◽  
Cocoa Beans ◽  
Long Period ◽  
Organochlorine Pesticide Residues ◽  
Ondo State ◽  
The Eu

Organochlorine pesticide residues in dried cocoa beans from selected towns from Ondo and Osun States, Nigeria were determined. Four towns Ondo and Idanre (Ondo State) and Ife and Ilesa (Osun State) were selected to represent cocoa producing areas in the states. Samples were extracted and cleaned-up on silica gel adsorbent. Pesticide residues were detected using Gas Chromatography – Mass Spectrometry (GC-MS). Five organochlorine pesticides were detected in the samples from Ondo state which includes alpha-HCH, beta-HCH, delta-HCH, endrin andp p’DDT. The levels ofp p’DDT (0.108 mg/kg and 0.107 mg/kg) detected in samples from Ondo and Idanre towns were lower than the EU MRL (0.5 mg/kg), while other detected organochlorine pesticide residues from the State were higher than the EU MRL. In Osun State, alpha-HCH, lindane, dieldrin, endrin, heptachlor-epoxide, endosulfan I andp p’DDT were organochlorine pesticide residues detected, with lindane (0.074 mg/kg), endosulfan I (0.099 mg/kg) andp p’DDT (0.235 mg/kg) being lower than EU MRLs. Higher levels of organochlorine pesticide residues than the EU MRLs suggest that the produce were not safe for human consumption because of the tendency of the pestsides to persist for a long period of time and as well bioaccumulate within the environment. The produce can also face trade threat in international market. Measures were suggested to ameliorate this situation.

Determination of multiple organochlorine pesticide residues in shrimp using modified QuEChERS extraction and gas chromatography

2018 ◽  
Vol 16 (1) ◽  
pp. 81-93
Author(s):  
MDH Prodhan ◽  
SN Alam
Keyword(s):  
Gas Chromatography ◽  
Organochlorine Pesticide ◽  
Pesticide Residues ◽  
Limit Of Detection ◽  
Residue Analysis ◽  
Limit Of Quantification ◽  
Modified Quechers ◽  
Endosulfan Sulphate ◽  
Organochlorine Pesticide Residues

Determination of organochlorine pesticide residues in shrimp is very important to ensure the consumer’s safety and to fulfill the importer’s demand. Therefore, a simple and efficient multiple organochlorine pesticide residues analytical method using quick, easy, cheap, effective, rugged and safe (QuEChERS) extraction technique and Gas Chromatography coupled with Electron Capture Detector (ECD) has been developed and validated for the determination of 19 organochlorine pesticides (α- BHC, δ- BHC, β- BHC, γ- BHC, Heptachlor, Aldrin, Heptachlor Epoxide, γ- Chlordane, α- Chlordane, α- Endosulfan, 4,4 DDE, Dieldrin, Endrin, 4,4 DDD, β- Endosulfan, 4,4 DDT, Endosulfan sulphate, Methoxychlor, and Endrin Ketone) in shrimp. The method was validated by evaluating the accuracy, precision, linearity, limit of detection (LOD) and limit of quantification (LOQ). The average recoveries of the selected pesticides ranged from 84% to 106% with RSDr ≤ 14% in four fortification levels of 0.05, 0.1, 0.2 and 0.3 mg kg-1. The linearity was ≥ 0.996 for all of the selected pesticides with matrix matched calibration standards. The LOD ranged from 0.003 to 0.009 mg kg-1 and the LOQ was 0.05 mg kg-1. This method was applied successfully for the residue analysis of 40 shrimp samples collected from different regions in Bangladesh.SAARC J. Agri., 16(1): 81-93 (2018)

scholarly journals Organochlorine pesticide residues in different fishes and shell fishes collected from the flood plains of Sonargaon upazila, Bangladesh

2019 ◽  
Vol 47 (1) ◽  
pp. 137-148
Author(s):  
Tonima Mustafa ◽  
M Niamul Naser ◽  
Gulshan Ara Latifa ◽  
Mohammad Shoeb ◽  
Nilufar Nahar
Keyword(s):  
Organochlorine Pesticide ◽  
Pesticide Residues ◽  
The Body ◽  
Health Concern ◽  
Human Consumption ◽  
Flood Plains ◽  
Percent Recovery ◽  
Organochlorine Pesticide Residues ◽  
Great Health ◽  
Total Body

The present study was carried out to assess the concentrations of organochlorine pesticide residues (DDTs; DDE, DDD, 2,4´-DDT and 4,4´-DDT) in natural fishes and prawn species during rainy-season (June-September, 2014) from flood plains of Sonargaon upazila, Bangladesh. The samples were extracted by Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) method and the extracts were cleaned-up by using H2SO4. Analysis of the samples for DDTs residues were carried out by using Gas Chromatograph with Electron Capture Detector (GC-ECD). Controlled fish sample (Cultured Rui fish) was used for the recovery experiments. Percent (%) recovery was found to be in the range of 70%- 113%. The total DDTs contents of the head of different fish and prawn species ranged from 7.53 ± 0.50 ng/g in Jatpunti (P. sophore) to 39.20 ± 3.76 ng/g in Bele (G. giuris) and of the body from 7.55 ± 0.50 ng/g in Jatpunti (P. sophore) to 41.93 ± 3.63 ng/g in Chewa (P. elongatus). While the total DDTs of the total body of seven fish and two prawn species ranged from 4.56 ng/g in Gurachingri (unidentified) to 37.15 ng/g in Chewa (P. elongatus). In the present study, 66.66% samples having value of (DDE + DDD)/DDT, lower than 0.5 ratios indicated the presence of new DDT inputs in the environments of Sonargaon area. The concentrations of total DDTs in all the samples were within the permissible MRL level i.e. for human consumption recommended by FAO-IAEA-WHO. As DDT is a long persistent and bioaccumulative substance in the environment, intake of significant amount of these toxic elements with our diet is a matter of great health concern. Bangladesh J. Zool. 47(1): 137-148, 2019

scholarly journals Determination of Organochlorine Pesticide and Polychlorinated Biphenyl Residues in Fatty Fish by Tandem Solid-Phase Extraction Cleanup

1996 ◽  
Vol 79 (5) ◽  
pp. 1209-1214 ◽  
Author(s):  
Frank J Schenck ◽  
Lori Calderon ◽  
Lynda V Podhorniak
Keyword(s):  
Solid Phase Extraction ◽  
Organochlorine Pesticide ◽  
Pesticide Residues ◽  
Polychlorinated Biphenyl ◽  
Solid Phase ◽  
Electron Capture Detection ◽  
Phase Extraction ◽  
Fatty Fish ◽  
Organochlorine Pesticide Residues

Abstract A rapid, multiresidue solid-phase extraction (SPE) technique for determination of organochlorine pesticide and polychlorinated biphenyl (PCB) residues in nonfatty fish was modified for use with fatty fish. In the modified procedures, samples are extracted with acetonitrile, and the extract is cleaned up with both C18 and Florisil SPE columns. Residues are determined by gas chromatography with electron capture detection. The original method was modified for use with fatty fish by reducing the amount of tissue extracted and by using an improved Florisil SPE cleanup. Recovery data are presented for 24 fortified organochlorine pesticide residues (0.12 ppm) and 3 fortified PCB residues (0.80 ppm) from flounder, bluefish, and shad samples, which contained 0.8,5.4, and 22.6% fat, respectively. For the 3 types of fish, recoveries of 23 of 24 fortified organochlorine pesticide residues ranged from 55 to 129%, and recoveries of 3 fortified PCB residues ranged from 55 to 104%. There were no significant differences in recovery based on fish species and/or fat content for the majority of residues studied. This SPE method and the official AOAC method yielded comparable results for fish containing incurred organochlorine residues.

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