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[Studies on sequential injection spectrophotometric system using a reflective flow cell for process analysis].

Shi-hua Fan1, Shi-li Wang, Xiao-feng Fan

  • 1Research Center for Analytical Sciences, Northern University, Shengyang, China.

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|March 12, 2005
PubMed
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A novel reflective flow cell minimizes refractive index and bubble interference for enhanced photometric detection. This system achieves sensitive chloride ion detection with high throughput.

Area of Science:

  • Analytical Chemistry
  • Optical Sensing
  • Flow Injection Analysis

Context:

  • Developing robust analytical methods is crucial for accurate chemical sensing.
  • Traditional flow cells can be susceptible to refractive index variations and air bubbles, impacting detection limits.
  • Optical fiber photometry offers sensitive detection but requires optimized cell design.

Purpose:

  • To design and evaluate a novel reflective flow cell for optical fiber photometric detection.
  • To improve immunity to refractive index changes and air bubble interference.
  • To establish a sensitive and precise analytical method for chloride ion determination.

Summary:

  • A reflective flow cell coupled with sequential injection and optical fiber photometry was developed.

Related Experiment Videos

  • The cell design ensures linear flow, minimizes bubble trapping, and reduces refractive index sensitivity.
  • Chloride ion detection using a mercury thiocyanate-iron(III) reaction demonstrated a linear range of 0-100 mg/L, a detection limit of 1.2 mg/L, and 30 samples/hour throughput.

    • Impact:

    • Provides a more robust and reliable flow cell for photometric analysis.
    • Enables accurate measurements in samples with varying refractive indices or potential for bubble formation.
    • Offers a high-throughput method for sensitive chloride ion quantification in analytical chemistry.