Citation: Li Junbo, Yang Xiaoli, Chang Honghong, Wei Wenlong. Resonance Rayleigh Scattering, Second-order Scattering and Frequency Doubling Scattering Spectra of Pd(Ⅱ)-MFH-EY System and Their Analytical Application[J]. Chemistry, ;2017, 80(8): 783-788. shu

Resonance Rayleigh Scattering, Second-order Scattering and Frequency Doubling Scattering Spectra of Pd(Ⅱ)-MFH-EY System and Their Analytical Application

1.
College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024
2.
Pharmaceutical Department, Changzhi Medical College, Changzhi 046000

Corresponding author: Wei Wenlong, lijunbo8109@163.com
Received Date: 13 February 2017
Accepted Date: 23 April 2017

Figures(8)

In pH 3.5 HAc-NaAc buffer medium, metformin hydrochloride(MFH) reacted with palladium(Ⅱ) (Pd(Ⅱ)) to form chelate cation, which further reacted with eosin Y (EY) to form the ternary ion-association complexes [Pd·MFH] (EY)₂, and the spectra of the system were recorded with synchronous scanning at λ_em=λ_ex (Δλ=0nm). The intensities of resonance Rayleigh scattering (RRS), second-order scattering (SOS) and frequency doubling scattering (FDS) were enhanced greatly and new scattering spectra appeared. The maximum RRS, SOS and FDS wavelengths of three ion-association complexes were located at 292nm, 540nm and 327nm, respectively. The increments of scattering intensity (ΔI_RRS, ΔI_SOS and ΔI_FDS) were directly proportional to the concentration of MFH in certain ranges. The detection limits (3σ) of Pd(Ⅱ)-MFH-EY system were 1.7ng·mL^-1 (RRS method), 13.2ng·mL^-1 (SOS method) and 22.7ng·mL^-1 (FDS method), separately. The optimum conditions of RRS method and the influence factors were discussed, in addition, the structure of ion-association complex and the reaction mechanism were investigated. Based on the ion-association reaction and its spectral response, the rapid, simple and sensitive RRS method for the determination of MFH had been developed. It had been applied to the determination of MFH in tablets and urine samples with satisfactory results.
- Metformin hydrochloride,
- Palladium(Ⅱ),
- Eosin Y,
- Resonance Reyleigh scattering,
- Resonance non linear scattering
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沈阳化工大学材料科学与工程学院沈阳 110142