The effect of sample treatments on the oxygen isotopic composition of phosphate pools in soils
| Autor: | Han Zhang, Ai-Rong Zheng, Xue-Tie Lei, An-Guo Peng, Ruth E. Blake, Deb P. Jaisi, Zhigang Chen, Min Chen, Xi-Guang Zhang, Zhao-Hua Jiang, Kai-Qiang Kang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Biogeochemical cycle
Chromatography Soil test Phosphorus Extraction (chemistry) chemistry.chemical_element Geology 04 agricultural and veterinary sciences 010501 environmental sciences Phosphate 01 natural sciences Oxygen chemistry.chemical_compound chemistry Geochemistry and Petrology Environmental chemistry TRACER Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries 0105 earth and related environmental sciences |
| Zdroj: | Chemical Geology. 474:9-16 |
| ISSN: | 0009-2541 |
| DOI: | 10.1016/j.chemgeo.2017.10.017 |
| Popis: | The oxygen isotopic composition of phosphate (δ18OP) has been increasingly used as an effective tracer for the biogeochemical cycling of phosphorus (P) in soils and other environments. However, diverse pretreatment methods (e.g. storage, preparation and extraction) are being used for soil samples. For the uniformity of methods as well as for the comparison of results, it is important to understand if specific treatment methods can compromise original δ18OP values. Here, Ag3PO4 and KH2PO4 were used to test whether a modified Hedley sequential extraction and purification procedure can alter the δ18OP values of phosphate standards. Additionally, to test the effect of sample storage and drying conditions, two types of soils were first processed by using eight different pretreatment methods including sterilizing, storing, drying, and sieving and then the δ18OP values of each soil P pool were measured. Results indicate that the extraction and purification procedure, drying temperature ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect