Reversed flow injection spectrophotometric determination of chlorate

An interfacing has been developed to connect a spectrophotometer with a personal computer and used as a readout system for development of a simple, rapid and sensitive reversed flow injection (rFI) procedure for chlorate determination. The method is based on the oxidation of indigo carmine by chlora...

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Main Authors: Thanyarat Chuesaard, Tharinee Wonganan, Teerapol Wongchanapiboon, Saisunee Liawruangrath
Format: Journal
Published: 2018
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-594592018-09-10T03:15:31Z Reversed flow injection spectrophotometric determination of chlorate Thanyarat Chuesaard Tharinee Wonganan Teerapol Wongchanapiboon Saisunee Liawruangrath Chemistry An interfacing has been developed to connect a spectrophotometer with a personal computer and used as a readout system for development of a simple, rapid and sensitive reversed flow injection (rFI) procedure for chlorate determination. The method is based on the oxidation of indigo carmine by chlorate ions in an acidic solution (dil. HCl) leading to the decrease in absorbance at 610 nm. The decrease in absorbance is directly related to the chlorate concentration present in the sample solutions. Optimum conditions for chlorate were examined. A linear calibration graph over the range of 0.1-0.5 mg L-1chlorate was established with the regression equation of Y = 104.5X + 1.0, r2= 0.9961 (n = 6). The detection limit (3σ) of 0.03 mg L-1, the limit of quantitation (10σ) of 0.10 mg L-1and the RSD of 3.2% for 0.3 mg L-1chlorate (n = 11) together with a sample throughput of 92 h-1were obtained. The recovery of the added chlorate in spiked water samples was 98.5 ± 3.1%. Major interferences for chlorate determination were found to be BrO3-, ClO2-, ClO-and IO3-which were overcome by using SO32-(as Na2SO3) as masking agent. The method has been successfully applied for the determination of chlorate in spiked water samples with the minimum reagent consumption of 14.0 mL h-1. Good agreement between the proposed rFIA and the reference methods was found verified by Student's t-test at 95% confidence level. © 2009 Elsevier B.V. All rights reserved. 2018-09-10T03:15:30Z 2018-09-10T03:15:30Z 2009-09-15 Journal 00399140 2-s2.0-67650104333 10.1016/j.talanta.2009.04.065 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=67650104333&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/59459
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Chemistry
spellingShingle Chemistry
Thanyarat Chuesaard
Tharinee Wonganan
Teerapol Wongchanapiboon
Saisunee Liawruangrath
Reversed flow injection spectrophotometric determination of chlorate
description An interfacing has been developed to connect a spectrophotometer with a personal computer and used as a readout system for development of a simple, rapid and sensitive reversed flow injection (rFI) procedure for chlorate determination. The method is based on the oxidation of indigo carmine by chlorate ions in an acidic solution (dil. HCl) leading to the decrease in absorbance at 610 nm. The decrease in absorbance is directly related to the chlorate concentration present in the sample solutions. Optimum conditions for chlorate were examined. A linear calibration graph over the range of 0.1-0.5 mg L-1chlorate was established with the regression equation of Y = 104.5X + 1.0, r2= 0.9961 (n = 6). The detection limit (3σ) of 0.03 mg L-1, the limit of quantitation (10σ) of 0.10 mg L-1and the RSD of 3.2% for 0.3 mg L-1chlorate (n = 11) together with a sample throughput of 92 h-1were obtained. The recovery of the added chlorate in spiked water samples was 98.5 ± 3.1%. Major interferences for chlorate determination were found to be BrO3-, ClO2-, ClO-and IO3-which were overcome by using SO32-(as Na2SO3) as masking agent. The method has been successfully applied for the determination of chlorate in spiked water samples with the minimum reagent consumption of 14.0 mL h-1. Good agreement between the proposed rFIA and the reference methods was found verified by Student's t-test at 95% confidence level. © 2009 Elsevier B.V. All rights reserved.
format Journal
author Thanyarat Chuesaard
Tharinee Wonganan
Teerapol Wongchanapiboon
Saisunee Liawruangrath
author_facet Thanyarat Chuesaard
Tharinee Wonganan
Teerapol Wongchanapiboon
Saisunee Liawruangrath
author_sort Thanyarat Chuesaard
title Reversed flow injection spectrophotometric determination of chlorate
title_short Reversed flow injection spectrophotometric determination of chlorate
title_full Reversed flow injection spectrophotometric determination of chlorate
title_fullStr Reversed flow injection spectrophotometric determination of chlorate
title_full_unstemmed Reversed flow injection spectrophotometric determination of chlorate
title_sort reversed flow injection spectrophotometric determination of chlorate
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=67650104333&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/59459
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