RESONANCE RAYLEIGH SCATTERING SPECTRA OF THE LEAD–XYLENOL ORANGE–CRYSTAL VIOLET SYSTEM AND THEIR ANALYTICAL APPLICATIONS
Abstract
A new method for determining lead by resonance Rayleigh scattering (RRS) has been proposed and its operation mechanism has been discussed. In pH 5.0 HAc-NaAc buffer solution, Pb(II) reacted with xylenol orange (XO) to form a chelating anion ([Pb (H2In)]2-), which further reacted with crystal violet (CV) to form ternary ionic complexes, resulting in the enhancement of RRS intensity. The RRS intensity increases linearly with the concentration of Pb(II) in the range of 2.00×10-3-2.00×10- 2 mg/L under optimal experimental conditions along with the detection limit of 9.2×10-5 mg/L. This method is a promising approach for the selective and sensitive determination of Pb(II) in tea.
About the Authors
Zh. Meng
College of Chemical and Biological Engineering, Lanzhou Jiaotong University
China
Lanzhou 730070
China
Lanzhou 730070
Sh. Li
College of Chemical and Biological Engineering, Lanzhou Jiaotong University
China
Lanzhou 730070
China
Lanzhou 730070
L. Haisu
Key Institute of Lightwave Technology, Beijing Jiaotong University
China
Beijing 100044
China
Beijing 100044
X. Ziyan
Zhangye Food and Drug Inspection Testing Center
China
Zhangye 734000
China
Zhangye 734000
S. Biquan
College of Chemical and Biological Engineering, Lanzhou Jiaotong University
China
Lanzhou 730070
China
Lanzhou 730070
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Review
For citations:
Meng Zh., Li Sh., Haisu L., Ziyan X., Biquan S. RESONANCE RAYLEIGH SCATTERING SPECTRA OF THE LEAD–XYLENOL ORANGE–CRYSTAL VIOLET SYSTEM AND THEIR ANALYTICAL APPLICATIONS. Zhurnal Prikladnoii Spektroskopii. 2020;87(1):174(1)-174(5).
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