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首页> 外文期刊>Environmental Science & Technology >Overestimation of Organic Phosphorus in Wetland Soils by Alkaline Extraction and Molybdate Colorimetry
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Overestimation of Organic Phosphorus in Wetland Soils by Alkaline Extraction and Molybdate Colorimetry

机译：碱性萃取和钼酸盐比色法高估湿地土壤中的有机磷

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摘要

Accurate information on the chemical nature of soil phosphorus is essential for understanding its bioavailability and fate in wetland ecosystems.Solution phosphorus-31 nuclear magnetic resonance (~(31)P NMR)spectroscopy was used to assess the conventional colorimetric procedure for phosphorus speciation in alkaline extracts of organic soils from the Florida Everglades.Molybdate colorimetry markedly overestimated organic phosphorus by between 30 and 54% compared to NMR spectroscopy.This was due in large part to the association of inorganic phosphate with organic matter,although the error was exacerbated in some samples by the presence of pyrophosphate,an inorganic polyphosphate that is not detected by colorimetry.The results have importantimplicationsfor our understanding of phosphorus biogeochemistry in wetlands and suggest that alkaline extraction and solution ~(31)P NMR spectroscopy is the only accurate method for quantifying organic phosphorus in wetland soils.
机译：关于土壤磷化学性质的准确信息对于了解其在湿地生态系统中的生物利用度和命运至关重要。溶液磷31核磁共振波谱（〜（31）P NMR）光谱用于评估碱性磷形态的常规比色程序相比于NMR光谱，钼酸盐比色法显着高估了30％至54％的有机磷，这在很大程度上是由于无机磷酸盐与有机物的缔合，尽管某些样品的误差加剧了结果表明，碱浸提和溶液〜（31）P NMR光谱法是定量测定有机磷的唯一准确方法，对我们理解湿地磷生物地球化学具有重要意义。在湿地土壤中。

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  • 来源
    《Environmental Science & Technology》 |2006年第10期|p.3349-3354|共6页
  • 作者

    BENJAMIN L.TURNER; SUSAN NEWMAN; K.RAMESH REDDY;

  • 作者单位

    Smithsonian Tropical Research Institute,Apartado 0843-03092,Balboa,Ancon,Republic of Panama,Everglades Division,South Florida Water Management District,3301 Gun Club Road,West Palm Beach,Florida 33406,and Wetland Biogeochemistry Laboratory,Soil and W;

    Smithsonian Tropical Research Institute,Apartado 0843-03092,Balboa,Ancon,Republic of Panama,Everglades Division,South Florida Water Management District,3301 Gun Club Road,West Palm Beach,Florida 33406,and Wetland Biogeochemistry Laboratory,Soil and W;

    Smithsonian Tropical Research Institute,Apartado 0843-03092,Balboa,Ancon,Republic of Panama,Everglades Division,South Florida Water Management District,3301 Gun Club Road,West Palm Beach,Florida 33406,and Wetland Biogeochemistry Laboratory,Soil and W;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
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