School of Earth, Ocean and Environmental Sciences, University of Plymouth, Drake Circus, Plymouth, Devon, PL4 8AA, UK.
J Chromatogr A. 2009 Dec 25;1216(52):9120-4. doi: 10.1016/j.chroma.2009.05.025. Epub 2009 May 18.
This paper reports the use of flow field-flow fractionation (FlFFF) to determine the temporal variability of colloidal (<1mum) particle size distributions in agricultural runoff waters in a small managed catchment in SW England during storm events. Three storm events of varying intensity were captured and the colloidal material in the runoff analysed by FlFFF. The technique had sufficient sensitivity to determine directly the changing colloidal profile over the 0.08-1.0mum size range in the runoff waters during these storm events. Rainfall, total phosphorus and suspended solids in the bulk runoff samples were also determined throughout one storm and showed significant correlation (P<0.01) with the amount of colloidal material. Whilst there are some uncertainties in the resolution and absolute calibration of the FlFFF profiles, the technique has considerable potential for the quantification of colloidal material in storm runoff waters.
本文报告了使用流场流分离（FlFFF）来确定在英格兰西南部一个小型管理流域中，暴雨水体中胶体（<1μm）颗粒大小分布的时间变化。捕获了三个不同强度的暴雨水体，并通过 FlFFF 分析了径流中的胶体物质。该技术具有足够的灵敏度，可以直接确定在这些暴雨水体中，在 0.08-1.0μm 大小范围内的胶体轮廓的变化。在整个暴雨水体中，还确定了降雨、总磷和悬浮固体在总径流样品中的含量，并且与胶体物质的含量具有显著相关性（P<0.01）。尽管 FlFFF 图谱的分辨率和绝对校准存在一些不确定性，但该技术在量化暴雨水体中的胶体物质方面具有很大的潜力。
