title: Determination of submicrogram amounts of vanadium in biological materials by extraction with N-cinnamoyl-N-2,3-xylylhydroxylamine and flameless atomic-absorption spectrometry with an atomizer coated with pyrolytic graphite.
abstract: A highly sensitive and simple method for determination of vanadium in plants and biological samples by solvent extraction and flameless atomic-absorption spectrometry with a carbon tube coated with pyrolytic graphite is described. After digestion of the sample, vanadium is separated by extraction of its N-cinnamoyl-N-2,3-xylylhydroxylamine complex into carbon tetrachloride from 6M hydrochloric acid medium. The method can be used to determine vanadium in plants and biological samples with average recovery of 94% and coefficient of variation of 14%. The sensitivity (1% absorption) is estimated to be 4 x 10(-11) g.
authors.affiliation: Ibaraki Hygienic Laboratory, 4-1, Atago-cho, Mito-shi, Ibaraki, 310, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Ishizaki
authors.forename: S
authors.initials: S
authors.lastname: Ueno