Comparison of solvent extraction and solid-phase extraction for the determination of organochlorine pesticide residues in water

The Analyst ◽  
1992 ◽  
Vol 117 (7) ◽  
pp. 1129 ◽  
Author(s):  
Guan H. Tan
Keyword(s):  
Solvent Extraction ◽  
Solid Phase Extraction ◽  
Organochlorine Pesticide ◽  
Pesticide Residues ◽  
Solid Phase ◽  
Phase Extraction ◽  
Organochlorine Pesticide Residues

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.

scholarly journals Florisil Solid-Phase Extraction Cartridges for Cleanup of Organochlorine Pesticide Residues in Foods

1996 ◽  
Vol 79 (6) ◽  
pp. 1454-1458 ◽  
Author(s):  
Frank J Schenck ◽  
Lori Calderon ◽  
Darlene E Saudarg
Keyword(s):  
Solid Phase Extraction ◽  
Petroleum Ether ◽  
Organochlorine Pesticides ◽  
Organochlorine Pesticide ◽  
Ethyl Ether ◽  
Pesticide Residues ◽  
Solid Phase ◽  
Phase Extraction ◽  
Organochlorine Pesticide Residues

Abstract Florisil solid-phase extraction cartridges were evaluated for cleanup of organochlorine pesticide residues in food extracts. Elution patterns and recoveries were determined for 24 organochlorine pesticides. A range of elution solvents was evaluated. A 2% ethyl ether–petroleum ether eluant optimized overall recoveries while minimizing interferences from coextractants.

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