title: A time-based injector applied to the flow injection spectrophotometric determination of boron in plant materials and soils.
abstract: A simple and flexible time-based injector is described for the introduction of almost any desirable volume of sample and reagents in flow systems. The feasibility of application is demonstrated by improving the azomethine-H spectrophotometric method for the precise and accurate determination of boron in soil and coffee plant tissues. On-line programmed functions include: sequential injections and zone trapping, with a significant reduction of sample and reagent consumption.
authors.affiliation: Department of Chemistry, Faculty of Sciences, University of Los Andes P.O. Box 542, Meŕida 5101-A, Venezuela.
authors.forename: P
authors.initials: P
authors.lastname: Carrero
authors.forename: J L
authors.initials: JL
authors.lastname: Burguera
authors.forename: M
authors.initials: M
authors.lastname: Burguera
authors.forename: C
authors.initials: C
authors.lastname: Rivas