Differential Fresnel-reflection-based fiber biochemical sensor with temperature self-compensation for high-resolution measurement of Cd2+ concentration in solution

Peng Qiang Zhu, Juan Juan Wang, Fei Rao, Changyuan Yu, Guiyao Zhou, Xu Guang Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)


A fiber biochemical sensor system was developed to measure cadmium (Cd2+) solution based on differential temperature self-compensation, which exhibits high sensitivity in detecting Cd2+. The device only consists of a light source, three couplers, two photodetectors, and two fiber sensing ends. Utilizing the efficient adsorption of cadmium ion by allylthiourea, the sensing head was prepared. The estimated concentration resolution of 4.9 × 10−7 mol/L and the standard deviation of concentration of 4.6 × 10−6 mol/L in large temperature range are achieved. The measured data is fitted to a second-order polynomial equation with good agreement. Moreover, the differential technique of the sensor can effectively eliminate concentration errors resulting from temperature fluctuations and environment effects, and thus real-time monitoring can be obtained.

Original languageEnglish
Pages (from-to)644-649
Number of pages6
JournalSensors and Actuators, B: Chemical
Publication statusPublished - 1 Mar 2019


  • Cadmium concentration measurement
  • Differential temperature self-compensation
  • Fiber biochemical sensor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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