Model HC - Oil in Water / Polycyclic Aromatic Hydrocarbons Meter

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The measuring principle is based on fluorescence: when lighted at a specific wavelength (excitation), some chemicals re-emit light (emission) at a longer wavelength.Very few chemicals are fluorescent giving a highly selective measurement.The table below gives the relative intesity of some aromatic hydrocarbons.

  • Anthracene 42
  • Benzene 10
  • Biphenyl 20
  • Chlorobenzene 7
  • Fluorobenzene 10
  • Naphtalene 35
  • Phenanthrene 25
  • Phenol 18
  • Propybenzene 17
  • Styrene 10
  • Toulene 17
  • Xylene 22

The emission light is detected by a high sensitivity photomultipler to detect very low concentrations from a few ppb.

The excitation light is controlled by a detector to compensate any variation of the source.

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