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首页> 外文期刊>Environmental Science & Technology >Comparison of Centrifugation and Filtration Techniques for the Size Fractionation of Colloidal Material in Soil Suspensions Using Sedimentation Field-Flow Fractionation
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Comparison of Centrifugation and Filtration Techniques for the Size Fractionation of Colloidal Material in Soil Suspensions Using Sedimentation Field-Flow Fractionation

机译：沉降场-流分馏技术对土壤悬浮液中胶体物质分级分离的离心分离技术的比较

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摘要

Sedimentation field-flow fractionation (SdFFF) with UV detection is used to systematically investigate the effect of traditional membrane filtration and centrifugation procedures on the isolation of specific size fractions from soil suspensions. Both procedures were used to isolate the nominal <0.45 and <0.2μm fractions from a clay soil suspension. Results showed that the membrane filtration approach seriously underestimated the total mass of particulate matter present as compared to the centrifugation approach. This has serious implications for the interpretation of results for "colloidal" and "soluble" fractions from soil suspensions and other environmental matrices obtained using the standard membrane approach. The results also show that sedimentation FFF has great potential as a robust and relatively mild technology for studying size distributions in the "colloidal" range for soil suspensions and other aquatic matrices.
机译：采用紫外检测的沉降流分离法（SdFFF）可系统地研究传统的膜过滤和离心方法对从土壤悬浮液中分离特定粒径的分离物的影响。两种方法均用于从粘土悬浮液中分离出标称的<0.45和<0.2μm的级分。结果表明，与离心方法相比，膜过滤方法严重低估了存在的颗粒物的总质量。这对于从土壤悬浮液和使​​用标准膜方法获得的“胶体”和“可溶”部分的结果的解释中具有重要意义。结果还表明，沉降FFF作为研究土壤悬浮液和其他水基质在“胶体”范围内的粒径分布的稳健且相对温和的技术具有巨大潜力。

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