【摘要】 采用顶空气相色谱法测定了土壤或底泥中的挥发性苯系物,测定了苯系物在10%NaCl水溶液60℃时的分配常数,给出了加入土壤导致液相体积改变的校正方法。用10%NaCl水溶液作为提取剂在60℃加热平衡60min,对5个苯系物的平均回收率达到73.6%,检出限为4.2～5.5ng/g。更多还原

【Abstract】 The headspace gas chromatograph was applied to determination of the volatile aromatic hydrocarbons in the soil or sediment.Henry′ s law constants of the volatile aromatic hydrocarbons in 10% NaCl solution at 60℃ was measured.The equilibration of the desorption was carried out by addition of 5ml 10% NaCl solution as the displacer after 60 minutes of thermostatting at 60℃.The average recovery of 73.6% for five aromatic hydrocarbons was achieved.The detection of limitation of the method for five aromatic hydrocarbons were about range 4.2 ～ 5.5ng /g.The effect of liquid phase volume variation on headspace analysis was studied.更多还原