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Flow injection on-line spectrophotometric determination of thorium(IV) after preconcentration on XAD-4 resin impregnated with oxytetracycline

Abstract

A very sensitive, selective and simple flow injection time-based method was developed for on-line preconcentration and determination of thorium(IV) at micro g L{sup -1} levels in environmental samples. The system operation was based on thorium(IV) ion retention at pH 4.0 in the minicolumn at a flow rate of 15.2 mL min{sup -1}. The trapped complex was then eluted with 3.6 mol L{sup -1} HCl at a flow rate of 4.9 mL min{sup -1}. The amount of thorium(IV) in the eluate was measured spectrophotometrically at 651 nm using arsenazo-III solution (0.05 % in 3.6 mol L{sup -1} HCl stabilized with 1 % triton X-100, 4.9 mL min{sup -1}) as colorimetric reagent. All chemical, and flow injection variables were optimized for the quantitative preconcentration of metal and a study of interference level of various ions was also carried out. The system offered low backpressure and improved sensitivity and selectivity. At a preconcentration time of 60 s and a sample frequency of 40 h{sup -1}, the enhancement factor was 97, the detection limit was 0.25 μg L{sup -1}, and the precision expressed as relative standard deviation was 1.08 % (at 50 μg L{sup -1}), whereas for 300 s of the preconcentration time and  More>>
Authors:
Shahida, Shabnam; Khan, Muhammad Haleem; [1]  Ali, Akbar [2] 
  1. Univ. of Azad Jammu and Kashmir, Muzaffarabad (Pakistan). Dept. of Chemistry
  2. Pakistan Institute of Nuclear Science and Technology, Islamabad (Pakistan). Chemistry Div.
Publication Date:
Feb 15, 2014
Product Type:
Journal Article
Resource Relation:
Journal Name: Journal of the Iranian Chemical Society (Print); Journal Volume: 11; Journal Issue: 1; Other Information: Country of input: Germany
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES; ARSENAZO; DETECTION; ENVIRONMENTAL MATERIALS; FLOW RATE; INJECTION; OXYTETRACYCLINE; PH VALUE; RESINS; SENSITIVITY; SPECTROPHOTOMETRY; THORIUM COMPOUNDS; TRACE AMOUNTS
OSTI ID:
22622636
Country of Origin:
Iran, Islamic Republic of
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1735-207X; CODEN: JICSCJ; TRN: DE17F4731069960
Submitting Site:
DE
Size:
page(s) 1-8
Announcement Date:
Sep 23, 2017

Citation Formats

Shahida, Shabnam, Khan, Muhammad Haleem, and Ali, Akbar. Flow injection on-line spectrophotometric determination of thorium(IV) after preconcentration on XAD-4 resin impregnated with oxytetracycline. Iran, Islamic Republic of: N. p., 2014. Web. doi:10.1007/s13738-013-0259-8.
Shahida, Shabnam, Khan, Muhammad Haleem, & Ali, Akbar. Flow injection on-line spectrophotometric determination of thorium(IV) after preconcentration on XAD-4 resin impregnated with oxytetracycline. Iran, Islamic Republic of. doi:10.1007/s13738-013-0259-8.
Shahida, Shabnam, Khan, Muhammad Haleem, and Ali, Akbar. 2014. "Flow injection on-line spectrophotometric determination of thorium(IV) after preconcentration on XAD-4 resin impregnated with oxytetracycline." Iran, Islamic Republic of. doi:10.1007/s13738-013-0259-8. https://www.osti.gov/servlets/purl/10.1007/s13738-013-0259-8.
@misc{etde_22622636,
title = {Flow injection on-line spectrophotometric determination of thorium(IV) after preconcentration on XAD-4 resin impregnated with oxytetracycline}
author = {Shahida, Shabnam, Khan, Muhammad Haleem, and Ali, Akbar}
abstractNote = {A very sensitive, selective and simple flow injection time-based method was developed for on-line preconcentration and determination of thorium(IV) at micro g L{sup -1} levels in environmental samples. The system operation was based on thorium(IV) ion retention at pH 4.0 in the minicolumn at a flow rate of 15.2 mL min{sup -1}. The trapped complex was then eluted with 3.6 mol L{sup -1} HCl at a flow rate of 4.9 mL min{sup -1}. The amount of thorium(IV) in the eluate was measured spectrophotometrically at 651 nm using arsenazo-III solution (0.05 % in 3.6 mol L{sup -1} HCl stabilized with 1 % triton X-100, 4.9 mL min{sup -1}) as colorimetric reagent. All chemical, and flow injection variables were optimized for the quantitative preconcentration of metal and a study of interference level of various ions was also carried out. The system offered low backpressure and improved sensitivity and selectivity. At a preconcentration time of 60 s and a sample frequency of 40 h{sup -1}, the enhancement factor was 97, the detection limit was 0.25 μg L{sup -1}, and the precision expressed as relative standard deviation was 1.08 % (at 50 μg L{sup -1}), whereas for 300 s of the preconcentration time and a sample frequency of 10 h{sup -1}, the enhancement factor of 357, the detection limit (3s) of 0.069 μg L{sup -1} and the precision of 1.32 % (at 10 μg L{sup -1}) was reported. The accuracy of the developed method was sufficient and evaluated by the analysis of certified reference material IAEA-SL-1 (Lake Sediment) and spiked water samples.}
doi = {10.1007/s13738-013-0259-8}
journal = {Journal of the Iranian Chemical Society (Print)}
issue = {1}
volume = {11}
journal type = {AC}
place = {Iran, Islamic Republic of}
year = {2014}
month = {Feb}
}