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Related Experiment Videos

Sensitive spectrophotometric method for determining pentachlorophenol in various environmental samples

O Agrawal1, G Sunita, V K Gupta

  • 1Pt. Ravishankar Shukla University, School of Studies in Chemistry, Raipur, India.

Journal of AOAC International
|July 29, 1998
PubMed
Summary

A new spectrophotometric method accurately determines pentachlorophenol (PCP), a common pesticide, in diverse environmental samples. This sensitive technique offers reliable quantification for environmental monitoring and safety assessments.

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Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry
  • Spectrophotometry

Background:

  • Pentachlorophenol (PCP) is a widely used insecticide and herbicide.
  • Accurate determination of PCP in environmental samples is crucial for risk assessment.

Purpose of the Study:

  • To develop a new, simple, and sensitive spectrophotometric method for PCP determination.
  • To validate the method for various environmental matrices.

Main Methods:

  • Reaction of PCP with concentrated nitric acid to form chloranil.
  • Chloranil liberates iodine from potassium iodide.
  • Iodine oxidizes leucocrystal violet to crystal violet, measured at 592 nm.

Main Results:

  • The method is sensitive, with Beer's law obeyed from 0.1-1.6 µg PCP/25 mL (0.004-0.064 ppm).

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  • Satisfactory results were obtained for PCP determination in air, water, plant material, textile effluent, and biological samples.

    • Conclusions:

    • The developed spectrophotometric method is effective for quantifying PCP in complex environmental samples.
    • This method provides a reliable tool for environmental monitoring of PCP contamination.