Determination of dissolved reactive phosphorus (DRP) and dissolved organic phosphorus (DOP) in natural waters by the use of rapid sequenced reagent injection flow analysis

A FI system for rapid sequential determination of dissolved reactive and organic phosphate is described. It utilizes on-line UV photo-oxidation for digestion of dissolved organic phosphate (DOP) with detection of the phosphate produced as phosphomolybdenum blue at 690 nm after reduction of phosphomo...

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Main Authors: Orawan Tue-Ngeun, Peter Ellis, Ian D. McKelvie, Paul Worsfold, Jaroon Jakmunee, Kate Grudpan
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/62150
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-621502018-09-11T09:22:42Z Determination of dissolved reactive phosphorus (DRP) and dissolved organic phosphorus (DOP) in natural waters by the use of rapid sequenced reagent injection flow analysis Orawan Tue-Ngeun Peter Ellis Ian D. McKelvie Paul Worsfold Jaroon Jakmunee Kate Grudpan Chemistry A FI system for rapid sequential determination of dissolved reactive and organic phosphate is described. It utilizes on-line UV photo-oxidation for digestion of dissolved organic phosphate (DOP) with detection of the phosphate produced as phosphomolybdenum blue at 690 nm after reduction of phosphomolybdate with tin(II) chloride. Two injections are performed in the analysis of each sample: the first of sample solution alone enables DRP determination, while the second is of sample plus alkaline peroxydisulfate solutions, which under the photo-oxidation conditions used converts DOP to DRP. The DOP content is evaluated from the difference of the two injections. The digestion efficiency for DOP, evaluated using a range of model organic P compounds of varying stability was greater than 97%. Calibrations were linear over the range of 0.01-6.00 mg P l-1for both DRP and DRP + DOP graphs, with a detection limit (3 s) of 0.01 mg P l-1for both species. Relative standard deviations were 0.3% (n = 11, 0.50 mg P l-1) for the DRP determination and 1.0% (n = 11, 0.50 mg P l-1) for the DRP + DOP determination. Injection throughput of 22 h-1was achieved. The proposed system was validated by analysis of the certified reference materials and comparison with the previous flow injection system. Additional advantage of this system is that it requires the use of only small amounts of the oxidant, with the result that nuisance gas bubble formation is correspondingly minimized. © 2004 Elsevier B.V. All rights reserved. 2018-09-11T09:22:42Z 2018-09-11T09:22:42Z 2005-04-15 Journal 00399140 2-s2.0-17744377402 10.1016/j.talanta.2004.12.032 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=17744377402&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/62150
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Chemistry
spellingShingle Chemistry
Orawan Tue-Ngeun
Peter Ellis
Ian D. McKelvie
Paul Worsfold
Jaroon Jakmunee
Kate Grudpan
Determination of dissolved reactive phosphorus (DRP) and dissolved organic phosphorus (DOP) in natural waters by the use of rapid sequenced reagent injection flow analysis
description A FI system for rapid sequential determination of dissolved reactive and organic phosphate is described. It utilizes on-line UV photo-oxidation for digestion of dissolved organic phosphate (DOP) with detection of the phosphate produced as phosphomolybdenum blue at 690 nm after reduction of phosphomolybdate with tin(II) chloride. Two injections are performed in the analysis of each sample: the first of sample solution alone enables DRP determination, while the second is of sample plus alkaline peroxydisulfate solutions, which under the photo-oxidation conditions used converts DOP to DRP. The DOP content is evaluated from the difference of the two injections. The digestion efficiency for DOP, evaluated using a range of model organic P compounds of varying stability was greater than 97%. Calibrations were linear over the range of 0.01-6.00 mg P l-1for both DRP and DRP + DOP graphs, with a detection limit (3 s) of 0.01 mg P l-1for both species. Relative standard deviations were 0.3% (n = 11, 0.50 mg P l-1) for the DRP determination and 1.0% (n = 11, 0.50 mg P l-1) for the DRP + DOP determination. Injection throughput of 22 h-1was achieved. The proposed system was validated by analysis of the certified reference materials and comparison with the previous flow injection system. Additional advantage of this system is that it requires the use of only small amounts of the oxidant, with the result that nuisance gas bubble formation is correspondingly minimized. © 2004 Elsevier B.V. All rights reserved.
format Journal
author Orawan Tue-Ngeun
Peter Ellis
Ian D. McKelvie
Paul Worsfold
Jaroon Jakmunee
Kate Grudpan
author_facet Orawan Tue-Ngeun
Peter Ellis
Ian D. McKelvie
Paul Worsfold
Jaroon Jakmunee
Kate Grudpan
author_sort Orawan Tue-Ngeun
title Determination of dissolved reactive phosphorus (DRP) and dissolved organic phosphorus (DOP) in natural waters by the use of rapid sequenced reagent injection flow analysis
title_short Determination of dissolved reactive phosphorus (DRP) and dissolved organic phosphorus (DOP) in natural waters by the use of rapid sequenced reagent injection flow analysis
title_full Determination of dissolved reactive phosphorus (DRP) and dissolved organic phosphorus (DOP) in natural waters by the use of rapid sequenced reagent injection flow analysis
title_fullStr Determination of dissolved reactive phosphorus (DRP) and dissolved organic phosphorus (DOP) in natural waters by the use of rapid sequenced reagent injection flow analysis
title_full_unstemmed Determination of dissolved reactive phosphorus (DRP) and dissolved organic phosphorus (DOP) in natural waters by the use of rapid sequenced reagent injection flow analysis
title_sort determination of dissolved reactive phosphorus (drp) and dissolved organic phosphorus (dop) in natural waters by the use of rapid sequenced reagent injection flow analysis
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=17744377402&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/62150
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