Comparison of octadecylsilica and graphitized carbon black as materials for solid-phase extraction of fungicide and insecticide residues from fruit and vegetables

1997 ◽  
Vol 778 (1-2) ◽  
pp. 127-137 ◽  
Author(s):  
C.M. Torres ◽  
Y. Pico´ ◽  
J. Man˜es
Keyword(s):  
Carbon Black ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Graphitized Carbon Black ◽  
Fruit And Vegetables ◽  
Phase Extraction ◽  
Insecticide Residues ◽  
Graphitized Carbon

Solid-phase extraction of chloramphenicol with graphitized carbon black

1987 ◽  
Vol 400 ◽  
pp. 283-291 ◽  
Author(s):  
Kyoung R. Kim ◽  
Yoon J. Lee ◽  
Hye S. Lee ◽  
Albert Zlatkis
Keyword(s):  
Carbon Black ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Graphitized Carbon Black ◽  
Phase Extraction ◽  
Graphitized Carbon

scholarly journals Determination of Nonylphenol and Octylphenol Ethoxylates in Effluent by Liquid Chromatography with Fluorescence Detection

1997 ◽  
Vol 80 (2) ◽  
pp. 401-407 ◽  
Author(s):  
Lindsey G Mackay ◽  
Marguerite Y Croft ◽  
David S Selby ◽  
Robert J Wells
Keyword(s):  
Fluorescence Detection ◽  
Nonionic Surfactants ◽  
Solid Phase ◽  
Graphitized Carbon Black ◽  
Phase Extraction ◽  
Matrix Interferences ◽  
Graphitized Carbon ◽  
Cleanup Procedure ◽  
Liquid Chromatographic

Abstract A robust liquid chromatographic (LC) method with fluorescence detection is described for the simultaneous determination of the nonionic surfactants nonylphenol ethoxylates (NPEO) and octylphenol ethoxylates (OPEO) in effluent samples from sewerage treatment plants. The cleanup procedure uses graphitized carbon black solid-phase extraction cartridges. A subsequent derivatization step removes matrix interferences that are no longer fluorescent after acetylation. The efficiency of the method is monitored by inclusion of a surrogate compound designed and synthesized specifically for this purpose. The limit of reporting for the method is 5 μg/L for 100 mL effluent samples. Studies on confirmation of identity of NPEO and OPEO by electrospray LC/mass spectrometry are described.

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