SI Wei, WEI Dong, YAO Zhen-xing, ZHAO Jie, CHEN Guo-dong, ZHAO Wei, YANG Jian, DU Bin*
(School of Resources and Environmental Sciences, University of Jinan, Jinan 250022, P R China )
Abstract: A spectrophotometric determination of trace Lead using T-(3-MO-4-HP) P-Tb as a chromogenic reagent has been systematically studied. The results showed that the chromogenic reaction was complete under the following conditions: pH = 4.95 of a HAc-NaAc buffer solution, AOT microemulsion, and a heating of 4 min in a boiling water bath. At the maximum absorption wavelength of 478 nm, the molar absorption coefficient ewas 7.49×105 L/(mol·cm). Beer’s law was obeyed in the concentration range of 0 ~ 0.200 μg/mL for lead II. This method is of high sensitivity, good selectivity, and can be applied to the determination of trace lead(II) in water sample with satisfactory results.
Key words: Meso-[tetra-(3- methoxy-4-hydroxyphenyl]-Tb3+ Porphyrin; lead; spectrophotometry; AOT microemulsion
E-mail: shanhusw@126.com
Analysis and Testing Technology and Instruments, Vol. 17, No. 1, 2011, 11-14.
