Improved solid-phase spectrophotometry for the microdetermination of chromium(VI) in natural water

Sulistyo Saputro, Kazuhisa Yoshimura, Shiro Matsuoka, Kô Takehara, Narsito

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

A simple and sensitive solid-phase spectrophotometry procedure was improved for the microdetermination of Cr(VI). A 0.06 cm 3 portion of a cation exchanger, Muromac AG 50W-X2, was used to concentrate the target Cr(VI) in a 20 cm 3 water sample, and resin beads were introduced in a flow cell of 1.5 mm diameter and having a 10 mm light path length for measurements using a UV-visible spectrophotometer. Three lenses were used for focusing the incident light beam and for recovering light scattered by the solid phase in the cell. The sensitivity achieved was higher by a factor of 277 compared with that of the solution method, and the detection limit was 0.014 μg dm -3 . The recovery on spiked real water samples by the standard addition method was 96 - 101%. Favorable working and performance characteristics made it possible to directly determine sub-μg dm -3 amounts of Cr(VI) in natural water samples.2009

Original languageEnglish
Pages (from-to)1445-1450
Number of pages6
Journalanalytical sciences
Volume25
Issue number12
DOIs
Publication statusPublished - Dec 2009

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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