Determination of trace amounts of bromide by flow injection/stopped-flow detection technique using kinetic-spectrophotometric method
A simple, sensitive and selective method for the determination of bromide in seawater by using a flow injection/stopped-flow detection technique was examined. The detection system was developed for a new kinetic-spectrophotometric determination of bromide in the presence of chloride matrix without a...
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th-cmuir.6653943832-48852014-08-30T02:55:54Z Determination of trace amounts of bromide by flow injection/stopped-flow detection technique using kinetic-spectrophotometric method Uraisin K. Nacapricha D. Lapanantnoppakhun S. Grudpan K. Motomizu S. A simple, sensitive and selective method for the determination of bromide in seawater by using a flow injection/stopped-flow detection technique was examined. The detection system was developed for a new kinetic-spectrophotometric determination of bromide in the presence of chloride matrix without any extraction and/or separation. The detection was based on the kinetic effect of bromide on the oxidation of methylene blue (MB) with hydrogen peroxide in a strongly acidic solution. Large amounts of chloride could enhance the sensitivity of the method as an activator. The decolorisation of the blue color of MB was used for the spectrophotometric determination of bromide at 746 nm. A stopped-flow approach was used to improve the sensitivity of the measurement and provide good linearity of the calibration over the range of 0-3.2 μg ml-1 of bromide. The relative standard deviation was 0.74% for the determination of 2.4 μg ml-1 bromide (n = 5). The detection limit (3σ) was 0.1 μg ml-1 with a sampling frequency of 12 h-1. The influence of potential interfering ions was studied. The proposed method was applied to the determination of bromide in seawater samples and provided satisfactory results. © 2005 Elsevier B.V. All rights reserved. 2014-08-30T02:55:54Z 2014-08-30T02:55:54Z 2005 Conference Paper 00399140 10.1016/j.talanta.2005.07.055 TLNTA http://www.scopus.com/inward/record.url?eid=2-s2.0-27744454582&partnerID=40&md5=5f46d6d6e61822c2eae1037eb87f22cc http://cmuir.cmu.ac.th/handle/6653943832/4885 English |
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A simple, sensitive and selective method for the determination of bromide in seawater by using a flow injection/stopped-flow detection technique was examined. The detection system was developed for a new kinetic-spectrophotometric determination of bromide in the presence of chloride matrix without any extraction and/or separation. The detection was based on the kinetic effect of bromide on the oxidation of methylene blue (MB) with hydrogen peroxide in a strongly acidic solution. Large amounts of chloride could enhance the sensitivity of the method as an activator. The decolorisation of the blue color of MB was used for the spectrophotometric determination of bromide at 746 nm. A stopped-flow approach was used to improve the sensitivity of the measurement and provide good linearity of the calibration over the range of 0-3.2 μg ml-1 of bromide. The relative standard deviation was 0.74% for the determination of 2.4 μg ml-1 bromide (n = 5). The detection limit (3σ) was 0.1 μg ml-1 with a sampling frequency of 12 h-1. The influence of potential interfering ions was studied. The proposed method was applied to the determination of bromide in seawater samples and provided satisfactory results. © 2005 Elsevier B.V. All rights reserved. |
format |
Conference or Workshop Item |
author |
Uraisin K. Nacapricha D. Lapanantnoppakhun S. Grudpan K. Motomizu S. |
spellingShingle |
Uraisin K. Nacapricha D. Lapanantnoppakhun S. Grudpan K. Motomizu S. Determination of trace amounts of bromide by flow injection/stopped-flow detection technique using kinetic-spectrophotometric method |
author_facet |
Uraisin K. Nacapricha D. Lapanantnoppakhun S. Grudpan K. Motomizu S. |
author_sort |
Uraisin K. |
title |
Determination of trace amounts of bromide by flow injection/stopped-flow detection technique using kinetic-spectrophotometric method |
title_short |
Determination of trace amounts of bromide by flow injection/stopped-flow detection technique using kinetic-spectrophotometric method |
title_full |
Determination of trace amounts of bromide by flow injection/stopped-flow detection technique using kinetic-spectrophotometric method |
title_fullStr |
Determination of trace amounts of bromide by flow injection/stopped-flow detection technique using kinetic-spectrophotometric method |
title_full_unstemmed |
Determination of trace amounts of bromide by flow injection/stopped-flow detection technique using kinetic-spectrophotometric method |
title_sort |
determination of trace amounts of bromide by flow injection/stopped-flow detection technique using kinetic-spectrophotometric method |
publishDate |
2014 |
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http://www.scopus.com/inward/record.url?eid=2-s2.0-27744454582&partnerID=40&md5=5f46d6d6e61822c2eae1037eb87f22cc http://cmuir.cmu.ac.th/handle/6653943832/4885 |
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