Determination of phosphorus in waste water by EDXRF |
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| Authors: | Sirpa Peräniemi Jouko Vepsäläinen Heikki Mustalahti and Markku Ahlgrén |
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| Institution: | (1) Department of Chemistry, University of Joensuu, P.O. Box 111, SF-80101 Joensuu, Finland;(2) Department of Chemistry, University of Kuopio, P.O. Box 6, SF-70211 Kuopio, Finland;(3) ACA Systems Oy, Tietotie 3, SF-83790 Polvijärvi, Finland |
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| Abstract: | Summary In a method developed for the determination of phosphorus in aqueous solutions, phosphorus was changed to the phosphate form, coprecipitated with hydrated iron(III) oxide, bound with activated charcoal and measured by EDXRF. The detection limit was 0.89 mg P/g activated charcoal. The method was used to determine the total phosphorus content of a waste water sample from a paper mill. Investigation of two sample destruction methods, dry ashing/HCl digestion and persulphate oxidation, showed the former to be more suitable for our purpose. |
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