Determination of antibacterial quaternary ammonium compound in lozenges and human serum by resonance light scattering technique.
A method for the specific determination of an antibacterial quaternary ammonium compound Dequalinium chloride (DQC) was described in this paper. At pH 0.5, the resonance light scattering (RLS) intensity of sodium dodecyl benzene sulfonate (SDBS) remarkably was enhanced by adding DQC. A RLS peak at 392.0 nm was found, and the enhanced intensity of RLS at this wavelength was proportional to the concentration of DQC in the range of 0.096-2.88 microg/mL. The detection limit was 2.98 ng/mL and the correlation coefficient was r=0.9988 (n=9). The method was applied to the analysis of DQC in lozenges and human serum. The results indicated that the method was sensitive, simple, practical and useful in the clinical assay.
Chen
Zhanguang
Z
Department of Chemistry, Shantou University, Shantou 515063, China. kqlu@stu.edu.cn
Peng
Yurui
Y
Chen
Junhui
J
Zhu
Li
L
D000900:Anti-Bacterial Agents / Q000097:blood* / Q000737:chemistry; D001557:Benzenesulfonates / Q000737:chemistry; D002021:Buffers; D002138:Calibration; D003868:Dequalinium / Q000097:blood* / Q000737:chemistry; D004355:Drug Stability; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008027:Light; D015394:Molecular Structure; D009994:Osmolar Concentration; D010316:Particle Size; D000644:Quaternary Ammonium Compounds / Q000097:blood* / Q000737:chemistry; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D012965:Sodium Chloride / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D055672:Static Electricity; D013501:Surface-Active Agents / Q000737:chemistry; D013607:Tablets / Q000032:analysis; D013997:Time Factors
D000900:Anti-Bacterial Agents; D001557:Benzenesulfonates; D002021:Buffers; D000644:Quaternary Ammonium Compounds; D013501:Surface-Active Agents; D013607:Tablets; D012965:Sodium Chloride; C001114:dodecylbenzenesulfonic acid; D003868:Dequalinium