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A new fi ber optic sensor based on the oxidation of 2,4-dichlorophenol(DCP) catalyzed by iron(II) phthalocyanine(Fe(II)Pc) was developed for the determination of DCP. The optical oxygen sensing fi lm containing fl uorescence indicator Ru(bpy)_3Cl_2 was used to detect the consumption of oxygen in solution. Moreover, a lock-in amplifier was used to determine the lifetime of the sensor head by detecting its phase delay change. The results reveal that the sensor has a linear detection range of 1.0×10~(-6)- 9.0×10~(-5) mol/L and a response time of 5 min. The sensor also has high selectivity, good repeatability and stability. It can be used effectively to determine DCP concentration in real samples.
A new fi ber optic sensor based on the oxidation of 2,4-dichlorophenol (DCP) catalyzed by iron (II) phthalocyanine (Fe (II) Pc) developed for the determination of DCP. The optical oxygen sensing fi lm containing fl uorescence indicator, Ru (bpy) _3Cl_2 was used to detect the consumption of oxygen in solution. Moreover, a lock-in amplifier was used to determine the lifetime of the sensor head by detecting its phase delay change. The results reveal that the sensor has a linear The detection range of 1.0 × 10 -6 - 9.0 × 10 -5 mol / L and a response time of 5 min. The sensor also has high selectivity, good repeatability and stability DCP concentration in real samples.