Application of Carboxylic Carbon Nanotubes to the Spectrophotometric Determination of Lead with DBH-PF

Chem. J. Chinese Universities ›› 2006, Vol. 27 ›› Issue (5): 830.doi:

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Application of Carboxylic Carbon Nanotubes to the Spectrophotometric Determination of Lead with DBH-PF

MAO Lei-Lei, WANG Zong-Hua*, XING Lin-Lin, YAN Yong-Chen, CHEN Yue

Department of Chemistry, College of Chemical Engineering, Qingdao University, Qingdao 266071, China

Received:1900-01-01 Revised:1900-01-01 Online:2006-05-10 Published:2006-05-10
Contact: WANG Zong-Hua

Abstract

Abstract:

Carboxylic carbon nanotubes were used in the chromogenic reaction for the determination of lead with 2,3,7-trihydroxy-9-(3,5-dibromo-4-hydroxyphenyl)flunrone(DBH-PF). A red complex was formed in the borate buffer solution in a pH range of 9.4-10.0 The maximum absorption of the complex appeared at 558.0 nm, and the apparent molar absorptivity was 5.62×10⁴ L·mol^-1·cm^-1. The linearity of the Pb2+ in mass concentration ranges from 1 μg to 50 μg per 25 mL of solution with a correlation coefficient of 0.999 6. This method has been applied to the determination of trace lead in cosmetics successfully.

Key words: Carboxylic carbon nanotubes; DBH-PF; Spectrophotometry; Lead

CLC Number:

O657

TrendMD:

MAO Lei-Lei, WANG Zong-Hua*, XING Lin-Lin, YAN Yong-Chen, CHEN Yue. Application of Carboxylic Carbon Nanotubes to the Spectrophotometric Determination of Lead with DBH-PF[J]. Chem. J. Chinese Universities, 2006, 27(5): 830.

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Application of Carboxylic Carbon Nanotubes to the Spectrophotometric Determination of Lead with DBH-PF

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