Analysis of pesticide exposure pads using selective absorption and elution of reversed-phase solid support

• Published in: Journal of agricultural and food chemistry Vol. 33; no. 6; pp. 1018 - 1021
• Main Authors: Bogus, Edward R, Gallagher, Patricia A, Cameron, E. Alan, Mumma, Ralph O
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.11.1985
• Subjects: ANALISIS; ANALYSE; ANALYSIS; Analysis methods; Applied sciences; Atmospheric pollution; CHROMATOGRAPHIE; CHROMATOGRAPHY; CROMATOGRAFIA; EVAPORACION; EVAPORATION; Exact sciences and technology; PESTICIDE; PESTICIDES; PLAGUICIDAS; Pollution; SOLVANT; SOLVENTE; SOLVENTS; Assay; Elution; Pollution; Absorption; Chemical analysis; Insecticide; Detection limit; Pesticides; Environment; Liquid chromatography; Sampling; High pressure
• ISSN: 0021-8561; 1520-5118
• DOI: 10.1021/jf00066a002

A sensitive, inexpensive procedure has been developed for the rapid analysis of applicator exposure pads. The pads were extracted with methanol or ethanol, the pesticides were selectively adsorbed and eluted on a reversed-phase solid support (SEP-PAKs) (a concentration step of 50:1), and the elutate was analyzed by high-pressure liquid chromatography. The technique has been field tested with two insecticides, carbaryl and diflubenzuron, providing a sensitivity of 50 and 240 ng of residue/pad (103.2 cm super(2)), respectively. Multiple samples can be worked up at the same time, and the procedure eliminates the need for more costly organic solvents, liquid/liquid extractions, or solvent evaporation steps.