Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 68,
  • Issue 4,
  • pp. 413-420
  • (2014)

Colorimetric Solid-Phase Extraction Method for Cu(II) Ion Determination Using 2-Hydroxybenzaldehyde Benzoylhydrazone as Sensing Reagent

Not Accessible

Your library or personal account may give you access

Abstract

A new sensor based on the use of 2-hydroxybenzaldehyde benzoylhydrazone as a colorimetric reagent immobilized onto styrenedivinylbenzene disks has been carried out for the determination of Cu(II) ions within several minutes. The sensor is designed on a rapid and easy two-step procedure: (1) the extraction of Cu(II) ions onto a disk loaded with the copper-selective colorimetric reagent and (2) the determination of the complexed analyte directly on the surface of the disk using diffuse reflectance measurements at 400 nm. The color of the disk changed from white to green in the presence of Cu(II) ions. The work herein details the optimization of the sensing system employing a fractional factorial design 3<sup>3-1</sup> considering three variables (pH, immobilization time, and amount of ligand immobilized onto the disk). The Pareto chart and response surfaces in a spherical domain indicated that the optimum conditions for the sensing of copper ions were pH = 7, with a ligand immobilization time of 10 min and 6.25 mg of reagent loaded onto the disk. Under the optimum conditions, the analytical parameters of the proposed method were determined. The calibration graph was linear over the range of 0 to 2.5 mg L<sup>−1</sup> of Cu(II) with a detection limit of 0.21 mg L<sup>−1</sup>. The relative standard deviation for six measurements of 1 mg L<sup>−1</sup> of Cu(II) was found to be 4.87%. The interference from inorganic salts and other metals was found not to be of major concern when monitoring copper ions in water samples. The simplicity and rapidity of this technique make it convenient and amenable for on-site and routine analysis.

PDF Article
More Like This
Ultra-sensitive optical fiber sensor based on intermodal interference and temperature calibration for trace detection of copper (II) ions

Zhen Liu, Gengsong Li, Aoyan Zhang, Guiyao Zhou, and Xuguang Huang
Opt. Express 29(15) 22992-23005 (2021)

Colorimetric method for phase evaluation

Antonin Miks, Jiri Novak, and Pavel Novak
J. Opt. Soc. Am. A 23(4) 894-901 (2006)

Cu2+-imprinted optical fiber SPR sensor for intelligent recognition

Lijie Zhang, Wenlong Yang, Chi Zhang, Rui Pan, Qiaoling Chen, and Liuyang Zhang
Opt. Express 30(25) 45525-45537 (2022)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved