摘要
在 pH2.3柠檬酸盐缓冲溶液中,铅与 Fe(Ⅲ )- TBA产生络合形成蓝紫色显色液。在此显色反应基础上,根据光谱修正光度理论,研究了该络合物不稳定系数及废水中微量铅测定方法。其相对标准偏差 RSD≤ 4.1%,加标回收率 92.0%~ 106%,铅的最低检测浓度为 0.015mg/ L。
Lead(II) can replace Fe(III) in its TBA chelate at pH2.3.In this paper,the determination of trace lead has been completed by theβ- correction spectrophotometry.This method is completely eliminate the effect of the excess Fe- TBA from its coloured solution to improve the linearity of the absorbance with Pb(II) concentration (X).The results showed that the recovery of lead was between 92.0%~ 106% ,with the RSD of less than 2.3% .
出处
《淮北煤师院学报(自然科学版)》
2000年第4期30-34,45,共6页
Journal of Huaibei Teachers College(Natural Sciences Edition)