Determination of norflurazon residues in mixed crop matrices
Winkler, V.W.; Patel, J.R.; Januszanis, M.; Colarusso, M.
Journal - Association of Official Analytical Chemists 64(6): 1309-1311
1981
ISSN/ISBN: 0004-5756 PMID: 7198114 Document Number: 179281
A method for determining norflurazon residues in mixed crop matrices is described. The method includes methanol Soxhlet extraction, hexane wash, addition of 10% saline, methylene chloride extraction, concentration, preparative thin layer chromatography of 10% sample aliquot, and resuspension of sample zone for gas-liquid chromatographic analysis. The lower level of electron capture detection is 0.01 ppm. Recoveries for 0.08 ppm spiked samples of cottonseed; soybean seed and foliage; peanut seed plus hulls and foliage,; orange and tangerine; lemon; apple and peach; and soil are generally greater than 80%.