title: Spectrophotometric determination of paraquat with BiI(-)(4) in the presence of gum arabic.
abstract: A spectrophotometric method for determination of Paraquat, based on its reaction with BiI(-)(4) ion in the presence of gum arabic, is described. The apparent molar absorptivity of the product is 1.64 x 10(4) 1.mole(-1).cm(-1) at 515 nm. Results for the analysis of commercial herbicides are in good agreement with those obtained by the dithionite method.
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040-Madrid, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Yañez-Sedeño
authors.forename: L M
authors.initials: LM
authors.lastname: Diez