气相色谱法研究有机物在河流沉积物上的吸附

本文提出用有机物在沉积物上的色谱比保留体积值估算沉积物有机碳吸附系数，为此，以河流沉积物作气相色谱固定相，用测定气相色谱固定液相对极性和有机物比保留体积的方法，测定了沉积物相对极性和有机物在其上比保留体积，研究了Ｖｇ与Ｋｏｃ的相关性，结果表明，萘的线性关系式为ｌｏｇＫ＝０．１８＋３．１１（ｒ＝０．９８３１，ｎ＝５）。硝基苯的关系为ｌｏｇＫ＝０．２４ｌｏｇＶｇ＋２．５９（ｒ＝０．９５４４，ｎ＝５）．

Study on Adsorption of Organic Compounds on River Sediment Using Gas Chromatography

The coefficient (K_oc) of organic carbon adsorption on river sediment can be estimated by determining the specific retention volume (V_g) of organic compounds on the sediment by gas chromatography. The sediment is used as the chromatographic stationary phase, and the relative polarity (P) of the sediment and V_g of the organic compound on it are determined. The interrelation between V_g and K_(oc) is investigated. The results show that the K_(oc) of naphthalene and nitrobenzene on the sediment increase with increasing V_g and their logarithm correlation is linear. The experimental results of the relative polarity of the sediment can well explain the relation between V_g and K_(oc).