Determination of total phosphorus in waters and wastewaters by on-line UV/thermal induced digestion and flow injection analysis
An on-line flow-injection system for the determination of total phosphorus in waters and wastewaters is described. Digestion was performed using a UV photoreactor and a thermal digestion unit connected in series. The orthophosphate formed was detected as phosphomolybdenum blue after on-line filtrati...
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Published in | Analytica chimica acta Vol. 326; no. 1; pp. 29 - 39 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
10.06.1996
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | An on-line flow-injection system for the determination of total phosphorus in waters and wastewaters is described. Digestion was performed using a UV photoreactor and a thermal digestion unit connected in series. The orthophosphate formed was detected as phosphomolybdenum blue after on-line filtration. Reagent and digestion conditions required to give optimal oxidation and hydrolysis of organic and condensed model compounds are reported. The flow-injection method gave complete recovery for all the model organic P compounds tested, and >85% recovery for condensed phosphates. When the proposed method was applied to a series of wastewater samples, the results obtained were in close agreement with those from a conventional batch digestion method. The technique was rapid (8 samples h
−1 4 replicates), with a linear range of interest for wastewaters 0–18 mgPl
−1 and a detection limit of 0.15 mgPl
−1. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0003-2670 1873-4324 |
DOI: | 10.1016/0003-2670(96)00044-X |