Determination of Organochlorine and Organophosphorus Pesticide Residues in Eggs Using a Solid Phase Extraction Cleanup

2000 ◽  
Vol 48 (12) ◽  
pp. 6412-6415 ◽  
Author(s):  
Frank J. Schenck ◽  
Dan J. Donoghue
Keyword(s):  
Solid Phase Extraction ◽  
Pesticide Residues ◽  
Solid Phase ◽  
Organophosphorus Pesticide ◽  
Phase Extraction

scholarly journals Study of Analytical Methods for Determining 16 Organophosphorus Pesticide Residues in Panax Notoginseng and Aucklandia Lappa Decne by Automated Solid-Phase Extraction System and GC/MS

2021 ◽  
Author(s):  
Na Wu ◽  
Gaozhang Gou ◽  
Dachao Liang ◽  
Jinru Ruan ◽  
Wei Liu ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Pesticide Residues ◽  
Solid Phase ◽  
Organophosphorus Pesticide ◽  
Panax Notoginseng ◽  
Extraction System ◽  
Phase Extraction ◽  
Homogenate Extraction ◽  
Automated Solid Phase Extraction

Abstract A fast and sensitive multi-residue analytical method was developed for the determination of organophosphorus pesticide residues in Panax notoginseng and Aucklandia lappa decne by comparing an ultrasonic extraction and homogenate extraction approach coupled with automated solid-phase extraction system and gas chromatography-mass spectrometry (GC/MS). Various factors affecting the homogenate extraction and purification efficiency were investigated in detail. The optimum conditions for homogenate extraction of organophosphorus pesticide residues from Panax notoginseng and Aucklandia lappa decne were 60 mL dichloromethane, 10000 r/min of extracting revolution speed and 2 min of extracting time. The extracts were cleaned up by automated solid-phase extraction system and determined by GC/MS. Under the optimum conditions, the results of the homogenate extraction approach were compared with those of the ultrasonic extraction, and the homogenate extraction approach was used to extract the samples. The average recoveries of the method by a homogenate extraction approach coupled with automated solid-phase extraction system and GC/MS ranged from 72.56% to 96.70%, and RSDs were 0.05~0.14%, which allowed the determination of 16 organophosphorus pesticide residues in Panax notoginseng and Aucklandia lappa decne. The results indicated that the proposed method can apply for the determination of organophosphate pesticides residues in Panax notoginseng and Aucklandia lappa decne with high accuracy and precision.

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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