AI Article Synopsis
- Solution phosphorus-31 nuclear magnetic resonance spectroscopy (31P-NMR) is a cutting-edge method for analyzing organic phosphorus in sediments.
- This study focused on optimizing the sample preparation for 31P-NMR, testing factors like sample treatment, extraction duration, and sample-to-extractant ratios.
- Findings indicated that air-dried samples provided better phosphorus recovery than fresh ones, with most phosphorus being extracted within the first 8 hours, while a 1:8 sediment to extractant ratio yielded more clear spectral signals compared to a 1:20 ratio.
Article Abstract
Solution phosphorus-31 nuclear magnetic resonance spectroscopy (31P-NMR) is a novel technology in characterization of organic phosphorus (P) composition in sediments. This study was aim to refine sample preparation procedures for 31P-NMR, including determination of sample pretreatment, extraction time, sample to extractant ratio and concentration method. The results showed that recovery of P with air dried sample treatment was higher than that for the fresh samples. Most of the P was extracted within the first 8 hours, and the time could extend to 12 to 16 hours in order to improve the recovery of P. Using the extraction ratio [m(sediment): V(extractant)] of 1:8 received more spectral signals compared to 1:20 when both the extracts were concentrated at the same time. No evident loss of P was found when the extract was concentrated at 28 degrees C followed by centrifugation under low temperature.
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