Quantitation and purification of quaternary ammonium compounds from halophyte tissue.
A simple and sensitive spectrophotometric assay for quaternary ammonium compounds (QACs) based on Dragendorff's reagent is described. Although not specific for a particular QAC, the assay allows for rapid survey of tissue for QAC content. A separation method for QACs in halophyte tissue containing high levels of cations was developed using ion exchange resins and ninhydrin to remove the amino acid fraction.
Stumpf
D K
DK
Environmental Research Laboratory, University of Arizona, Tucson International Airport, Tucson, Arizona 85706.