影响铅同富里酸络合容量测定的因素

FACTORS INFLUENCING THE MEASUREMENT OF FULVIC COMPLEXING CAPACITY WITH LEAD

对内蒙古地区天然水中有机配体与铅的表观络合容量（Ｃ．Ｃ）进行了阳极溶出伏安法（ＡＳＶ）测定，并计算总条件稳定常数（Ｋ）和络合容量指数（Ｉ）；对电极的线性关系和重现性、络合平衡时间、ｐＨ等因素做了半定量讨论．在电极检测下限为１０－９ｍｏｌ·Ｌ－１铅时，采用１０ｍｉｎ平衡时间为宜，ｐＨ等是影响络合反应的主要因素．在天然ｐＨ值下，铅的表观络合容量为呼伦湖最大。

Determination of lead apparent complexing capacity of the natural water in Inner Mongolia has been studied by ASV.The conditional stability constant and complexing capacity index were calculated.The measuring factors of electrodes linear relationship and repeatability.Complexing balance time and pH were semi quantitative discussed.Based on 10 -9 mol·L -1 lead detection limit of electrodes,10min balance time was adopted.pH etc. are major influencing factors on C.C .Under natural pH,apparent complexing capacity of lead is maximum in Hu Lun Lake,minimum is Wu Liang Su Hai.