Fractionation of sediment phosphate with chelating compounds: a simplification, and comparison with other methods |
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| Authors: | H. L. Golterman |
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| Affiliation: | (1) Association ‘Leiden-Camargue’, Station Biologique de la Tour du Valat, le Sambuc, F-13200 Arles, France;(2) Present address: Mas dou Bòchi, Ch. de Tintarlot, F-13200 Arles, France |
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| Abstract: | The NTA/EDTA fractionation of sediment-bound, inorganic phosphate was improved and made more effective. The iron-bound phosphate is now extracted with Ca-EDTA plus dithionite and followed by an extraction of calcium-bound phosphate by Nat-EDTA at pH = 4.5. A comparison is made with two other sequential extraction procedures: the SEDEX and the Hieltjes & Lijklema extractions. The EDTA extractions have an advantage over the other two methods. |
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| Keywords: | phosphate extraction phosphate fractionation sediments EDTA |
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