Pesticide residues determination in common bean using an optimized QuEChERS approach followed by solvent exchange and GC–MS/MS analysis

2020 ◽  
Vol 100 (6) ◽  
pp. 2425-2434 ◽  
Author(s):  
Bárbara Reichert ◽  
Maria G Pereira Nunes ◽  
Ionara R Pizzutti ◽  
Ijoni H Costabeber ◽  
Marlos Z Fontana ◽  
...  
Keyword(s):  
Common Bean ◽  
Pesticide Residues ◽  
Solvent Exchange ◽  
Ms Analysis ◽  
Residues Determination

A Modified QuEChERS Extraction and LC-MS/MS Method for the Determination of Pesticide Residues in Curry Leaves (Murraya koenigii)

2019 ◽  
Vol 6 (1) ◽  
pp. 30-41
Author(s):  
Ranjith Arimboor ◽  
Karunkara Ramakrishna Menon ◽  
Natarajan Ramesh Babu ◽  
Haneesh Chandran
Keyword(s):  
Sample Preparation ◽  
Matrix Effect ◽  
Retention Time ◽  
Pesticide Residues ◽  
Mobile Phase ◽  
Preparation Technique ◽  
Modified Quechers ◽  
Curry Leaves ◽  
Ms Analysis ◽  
The Matrix

Background:Increased consumer demand for curry leaves free from pesticides demands fast and reliable analytical methods for the analysis of pesticide residues.Objective:The optimization of a QuEChERS based sample preparation technique with improved analytical accuracy by removing interfering matrix components for LC-MS/MS analysis of pesticide residues from curry leaves.Methods:A modified QuEChERS solid phase extraction method was developed and validated for the analysis of 26 pesticides in fresh and dried curry leaves. The effects of the sample preparation steps and column retention time on the matrix suppression of analyte ions were also evaluated.Results:Validation parameters were found within an acceptable range. The matrix effect evaluation studies showed that the QuEChERS sample preparation was able to minimize the ion suppression of analytes due to co-eluting matrix of components and that a d-SPE clean up step had major role in reducing matrix effect. The gradient mobile phase with longer retention time for analytes resulted in comparatively lesser matrix effects than the isocratic mobile phase of non-polar nature. Even after the clean up, a considerable number of compounds had more than 20% reduction in their MS response in the gradient mobile phase.Conclusion:This study emphasized the need of proper sample clean up before a LC-MS/MS analysis and the usage of matrix matched standards and mobile phase that ultimately results in an appropriate analyte separation in reasonable retention times.

Pesticide residues determination in Polish organic crops in 2007–2010 applying gas chromatography–tandem quadrupole mass spectrometry

2013 ◽  
Vol 139 (1-4) ◽  
pp. 482-487 ◽  
Author(s):  
Stanisław Walorczyk ◽  
Dariusz Drożdżyński ◽  
Jolanta Kowalska ◽  
Dorota Remlein-Starosta ◽  
Andrzej Ziółkowski ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Pesticide Residues ◽  
Quadrupole Mass ◽  
Quadrupole Mass Spectrometry ◽  
Residues Determination ◽  
Tandem Quadrupole

Pesticide residues determination in food premises in Bench-Maji zone, Southwest Ethiopia

2021 ◽  
Author(s):  
Besufekad Mekonnen ◽  
Jafer Siraj ◽  
Samuel Negash
Keyword(s):  
Pesticide Residues ◽  
Human Life ◽  
Cereal Crops ◽  
Veterinary Drug ◽  
Southwest Ethiopia ◽  
Governmental Organizations ◽  
Vector Management ◽  
Residues Determination ◽  
Local Farm ◽  
Human Health Effects

Abstract Pesticides are very important risk factors in human life causing chronic human health effects. Pesticides are commonly used across the globe to enhance human endeavors. In Ethiopia, pesticides are widely used by local farmers and governmental organizations for pests control purpose. However, majority of pesticides are not specifically targeting the pest. As a result, pesticide residues in food items have been a concern to the consumers and environment they live in. Therefore, this study was aimed to determine the amount of organo-chlorine and organo-phosphate pesticide residues in cereal crops in Bench-Maji Zone, Ethiopia. Experimental study design was employed to determine the amount of pesticide residues and cereal crops were bought from the local farm sites and market of purposively selected sites. The samples were extracted using a Quick, Easy, Cheap, Effective, Rugged and Safe extraction and clean up method. Finally, the extracted samples were injected into Gas chromatography tandem Mass Spectrometer and the types, and concentrations of pesticide residues were analyzed using linear regression equation that obtained from calibration curves. The highest concentration of Endosulfan sulfate (0.076 mgkg− 1) was detected in rice, followed by Dimethoate (0.068 mgkg− 1) and p,p’-DDE (0.087 mgkg− 1) in Sorghum and common millet, respectively in the samples obtained from Gurafarda site. The highest concentration of p,p’-DDT (0.133 mgkg− 1) was detected in common millet, followed by Aldrin (0.082mgkg− 1) and Dimethoate (0.077mgkg− 1) in Sorghum and common millet, respectively in the samples obtained from North-Bench site. In addition, Aldrin detected in rice, sorghum and common millet obtained from the three sites was a residue of above the maximum residual limits set by Codex Alimentarius regulations and European Union. The finding shows that the detection of pesticide residues in cereal crops in samples obtained from the study area. It is an indication of the widespread use of pesticides in cereal crops production. Therefore, strict supervision of pesticide application in the fields, regulation of informal veterinary drug store and implmentation of integrated vector management strategy are recommended.

Pesticide Residues, Determination of Diphenylamine Residues on Apples

1958 ◽  
Vol 6 (8) ◽  
pp. 597-600 ◽  
Author(s):  
R. B. Bruce ◽  
J. W. Howard ◽  
J. B. Zink
Keyword(s):  
Pesticide Residues ◽  
Residues Determination
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