title: An application of silaned glass beads to the preconcentration and spectrophotometric determination of traces of phosphorus with molybdate.
abstract: Silaned glass beads are applied to the preconcentration and spectrophotometric determination of phosphorus as the phosphomolybdenum blue complex. Traces of phosphorus in water are collected as a phosphomolybdenum blue complex on a column of the beads. The phosphomolybdenum blue is eluted with N,N-dimethylformamide and the absorbance of the eluate continuously monitored at 700 nm. The height of the very sharp peak obtained is proportional to the amount of phosphorus present and 0.1-0.5 mug of phosphorus in a 10-ml sample can be determined reproducibly. Interference from arsenate is eliminated by addition of a reducing agent. High concentrations of silica cause a small positive error. This method is applicable to the analysis of river water and sea-water samples.
authors.affiliation: Department of Chemistry, Faculty of Science, Toyama University, Toyama, Japan 930.
authors.forename: S
authors.initials: S
authors.lastname: Taguchi
authors.forename: K
authors.initials: K
authors.lastname: Goto
authors.forename: H
authors.initials: H
authors.lastname: Watanabe