A Simple and Highly Sensitive Spectrometric Determination of Lead by Using Carboxylic Carbon Nanotubes and Cetyltrimethyl ammoniumbromide

作者：Yin Qiang^*; Chen Rong; Liu Yurong

来源：International Journal of Electrochemical Science, 2011, 6(12): 6620-6627.

• Lead
• Carbon nanotubes
• cetyltrimethyl ammoniumbromide
• spectrometric determination

A novel and sensitive spectrometric method for determination of lead was developed with the application of carboxylic carbon nanotubes (CNTs) and cetyltrimethyl ammoniumbromide (CTMAB). The optimum operating conditions regarding pH, volume and addition order of reagents solution were established. The nature of the complex was also investigated. Comparative experiments proved that the application of carboxyl CNTs and CTMAB had the obvious hyperchromic effect: the absorbance of the complex was increased by nearly 90% through optimizing the technological parameters. The coloration system showed the maximum absorbance at 600.4nm with a molar absorptivity value of 0.70x10(5) L mol(-1) cm(-1); the calibration graph was linear over the range 0.5-11.0 mu g/25.0mL and the limit of detection was 17.8ng/mL. Moreover, the method is easy and direct to perform for the determination of lead.

• 出版日期2011-12
• 单位东华理工大学