A Wireless Magnetoelastic Sensor for Urinary 2-Naphthol Detection Based on the Precipitation of 2-Naphthol with Diazonium Salts

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  • YUAN Yu-Kun
    College of Public Health, University of South China The Clinical Laboratory of Chenzhou Fourth People’s Hospital
  • WANG Yong-Sheng
    College of Public Health, University of South China
  • XIAO Xi-Lin
    College of Chemistry and Chemical Engineering, University of South China
  • XUE Jin-Hua
    College of Public Health, University of South China
  • LI Gui-Rong
    College of Public Health, University of South China
  • KANG Rong-Hui
    College of Public Health, University of South China
  • ZHANG Jin-Quan
    College of Public Health, University of South China
  • SHI Lin-Fei
    College of Public Health, University of South China

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抄録

A wireless magnetoelastic sensor has been developed for the determination of 2-naphthol (2-NAP) in human urine. This method is based on the precipitation of 2-NAP with diazonium salts produced by the diazo-reaction of sulfamethoxazole (SMZ) with nitrite under a weak alkaline condition, resulting in a descending of the resonance frequency of a wireless magnetoelastic sensor. The frequence shift values (ΔF) of the sensor were directly proportional to the concentration in the range of 1.13 – 139 μmol L−1 for 2-NAP with a correlation coefficient of 0.997 and a detection limit of 0.340 μmol L−1. The relative standard deviations were 2.38, 2.40 and 2.44%, and the average recovery was 107% (n = 6). The proposed method has additional advantages of being less time-consuming, low cost and remote query, and can be applied for real-time and in situ monitoring of 2-NAP in human urine. It would be a benefit to extend the scope of applications of magnetoelastic sensing techniques.

収録刊行物

  • Analytical Sciences

    Analytical Sciences 27 (5), 517-, 2011

    社団法人 日本分析化学会

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