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Citation: LI Qin, ZHOU Shang, YANG Jidong. Study on Resonance Rayleigh Scattering Spectra of Phosphowolframic Acid and Fluoroquinolone Antibiotics System and Their Analytical Application[J]. Chinese Journal of Applied Chemistry, ;2011, 28(1): 107-112. doi: 10.3724/SP.J.1095.2011.00195 shu

Study on Resonance Rayleigh Scattering Spectra of Phosphowolframic Acid and Fluoroquinolone Antibiotics System and Their Analytical Application

LI Qin ^a ,
ZHOU Shang ^b ,
YANG Jidong ^a，b,,

1.
a School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715;
2.
b School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100

Corresponding author: YANG Jidong,
Received Date: 6 April 2010
Available Online: 15 July 2010
Fund Project: 重庆市教委科研资助项目(KJ081306) (KJ081306)

In 5.0 mol/L HCl buffer solution, phosphowolframic acid (Pwa) could react with moxifloxacin (MXFX) and gatifloxacin (GTF) fluoroquinolone antibiotics (FLQs) to form 1:1 ion-associated complexes respectively. The reactions resulted in great enhancement of resonance Rayleigh scattering(RRS) and new RRS bands appear. The reaction products of the two drugs had similar spectral characteristics, and the maximum RRS wavelength was located at 320 nm. The intensities of RRS are proportional to the concentration of antibiotics, the linearity ranges of two fluoroquinolone antibiotics are 0.025~6.0 mg/L (MXFX) and 0.023~9.0 mg/L(GTF), respectively. Therefore, a new method for determination of the drugs could be developed and applied to the determination of FLQs in capsules and human urine samples. The reaction mechanism and the reasons for RRS enhancement of the system were investigated.
- moxifloxacin,
- gatifloxacin,
- phosphowolframic acid,
- resonance Rayleigh scattering spectra
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