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- Title
Enhanced organic phosphorus detection in sediments by foam separation and P-NMR.
- Authors
Shi, Yuxin; Pan, Tengfei; Mu, Di; Wu, Hongqin; Meng, Qingqiang; Qi, Shuting
- Abstract
Phosphorus (P) is both a nutrient and a pollutant. For instance, excess P induces water eutrophication followed by death of fishes and other water life. Determination of organic P content in sediments is therefore important to study P cycling and environmental pollution. The most widely used method to determine organic P in sediments is NaOH-EDTA extraction followed by P-NMR detection. However, some organic P compounds are difficult to extract using NaOH-EDTA due to the low solubility, thus can not be detected by P NMR. Here, we used foam separation to determine organic P in sediment of North Canal of Tianjin City, China. Organic P was first enriched using foam separation coupled with NaOH extraction. The enriched organic P was then analyzed with P NMR. The results showed that, compared with the traditional extraction method, foam separation coupled with NaOH extraction enriched more P compound because P NMR detected an extra signal of teichoic acid at chemical shift 1.14. This teichoic acid signal was not detected in the extract prepared using only NaOH-EDTA. Our finding demonstrates that determination using foam separation followed by P NMR is feasible.
- Subjects
FOAM fractionation; NUCLEAR magnetic resonance; EUTROPHICATION; PHOSPHORUS cycle (Biogeochemistry); SEDIMENTS
- Publication
Environmental Chemistry Letters, 2014, Vol 12, Issue 3, p401
- ISSN
1610-3653
- Publication type
Article
- DOI
10.1007/s10311-014-0461-7