Journal of Guangxi Normal University(Natural Science Edition) ›› 2015, Vol. 33 ›› Issue (3): 104-110.doi: 10.16088/j.issn.1001-6600.2015.03.016

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Sensitizer Fluorometry by Surfactant and Metal Ion for Determination of Trace Benzoic Acid

LI Ping 1,2, SONG Shao-fei1, ZHOU Fu-lin3, YANG Kun2,4   

  1. 1. School of Materials and Engineering, Shaanxi Normal University, Xi’an Shaanxi 710062;
    2. Key Laboratory forMacromolecular Science and Chemical Ecology of Inner Mongolia, Jining Normal University, Wulanchabu Inner Mongolia012000;
    3. Department of Applied Chemistry, Yuncheng University, Yuncheng Shanxi 044000;
    4. School of Chemistry, Baotou Teacher’s College,Baotou Inner Mongolia 014030
  • Received:2015-04-22 Online:2015-05-10 Published:2018-09-20

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Abstract: In boric acid-borax buffer solution medium, with the help of Co2+, and the CTMAB surfactant as a sensitizer, the benzoic acid was sensitized to emit strong fluorescence. Based on this, a new method for the determination of benzoic acid was established. To optimize the experimental conditions, at cCo2+=3×10-3 mol/L, cCTMAB=7×10-4 mol/L, pH=8.4, T=30 ℃, water bath heating 22 min, 302 nm as the maximum excitation wavelength, 608 nm as the maximum emission wavelength, determination of benzoic acid was performed. The linear range is 5×10-6~1.0×10-3 g/L and the detection limit for 2×10-6 g/L. The recovery rate is 101%～105% for the determination of benzoic acid.

Key words: fluorometry, sensitizer, benzoic acid, preserved szechuan pickle

CLC Number: 

  • O631.5
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