Solid-phase spectrophotometric iodometric determination of nitrite and selenium(IV) using a polymethacrylate matrix

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5 Citations (Scopus)

Abstract

Procedures for the iodometric solid-phase spectrophotometric determination of nitrite and selenium(IV) using a polymethacrylate matrix are proposed. The procedures are based on the reaction of nitrite and selenium(IV) with iodine in an acidic medium with the release of free iodine in amounts equivalent to those of the substances to be determined, extraction of the iodine formed with a polymethacrylate matrix, and measurement of absorbance of the matrix at 370 nm. The developed procedures ensure the determination of 0.01–0.12 mg/L of nitrite and 0.05–0.40 mg/L of selenium(IV) with limits of detection of 0.005 and 0.03 mg/L, respectively. It was shown that the proposed procedures can be applied to the determination of selenium(IV) in mineral water and nitrites in vegetables and soil.

Original languageEnglish
Pages (from-to)546-550
Number of pages5
JournalJournal of Analytical Chemistry
Volume72
Issue number5
DOIs
Publication statusPublished - 1 May 2017

Keywords

  • iodometry
  • nitrite
  • polymethacrylate matrix
  • selenium(IV)
  • solid-phase spectrophotometry

ASJC Scopus subject areas

  • Analytical Chemistry

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