University of North Florida
Browse the Citations

Contact Info

Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

View Stuart Chalk's profile on LinkedIn


Classification: Vegetable -> parsnip

Citations 1

"High Performance Liquid Chromatographic Method For Determination Of Six N-methylcarbamates In Vegetables And Fruits"
Bull. Environ. Contam. Toxicol. 1984 Volume 33, Issue 5 Pages 538-547
Keh-Chuh Ting, Peng K. Kho, Anna S. Musselman, George A. Root and George R. Tichelaar

Abstract: The sample was chopped and blended with acetonitrile, the aqueous layer was filtered off and NaCl was added to the filtrate with shaking. The mixture was centrifuged and the upper acetonitrile layer was removed and evaporated to dryness. For certain crops (e.g., citrus fruit, celery heart, mint, cilantro, parsley and parsnip) a clean-up step on Florisil was included at this point. The final methanolic solution containing the pesticides was analyzed on a column (25 cm x 4.6 mm) of Ultrasphere ODS (5 µm) equipped with a pre-column of octadecyl material on glass beads. Elution was effected with a linear gradient of acetonitrile - water (1:19 to 7:3 in 12 min, then to 1:19 in 1 min, maintained for 3 min) at a flow rate of 1.5 mL min-1. Post-column derivatization with phthalaldehyde was employed and the fluorescent products were detected at 455 nm (excitation at 360 nm). The HPLC system is described in detail and illustrated. Recovery data for oxamyl, methomyl, aldicarb, carbofuran, carbaryl and methiocarb are tabulated.
Carbamates, N-methyl Pesticides Oxamyl Methomyl Aldicarb Carbofuran Carbaryl Methiocarb HPLC Fluorescence Post-column derivatization Glass beads