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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 11
BKCSDE 34(11)
November 20, 2013 

A Fiber Optic Sensor for Determination of 2,4-Dichlorophenol Based on Oxygen Oxidation Catalyzed by Iron(III) Tetrasulfophthalocyanine
Yilin Tong, Dapeng Li, Jun Huang*, Cong Zhang, Kun Li, Liyun Ding
2,4-Dichlorophenol, Iron(III) tetrasulfophthalocyanine, Fiber optic sensor, Phase delay
A new fiber optical sensor was developed for the determination of 2,4-dichlorophenol (DCP). The sensor was based on DCP oxidation by oxygen with the catalysis of iron(III) tetrasulfophthalocyanine (Fe(III)PcTs). The optical oxygen sensing film with Ru(bpy)3Cl2 as the fluorescence indicator was used to determine the consumption of oxygen in solution. A lock-in amplifier was used for detecting the lifetime of the oxygen sensing film by measuring the phase delay change of the sensor head. The different variables affecting the sensor performance were evaluated and optimized. Under the optimal conditions (i.e. pH 6.0, 25 oC, Fe(III)PcTs concentration of 0.62 mg/mL), the linear detection range and response time of the sensor are 1.0 × 10−6-9.0 × 10−6 mol/L and 250 s, respectively. The sensor displays high selectivity, good repeatability and stability, and can be used as an effective tool in analyzing DCP concentration in practical samples.
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