Fluorescence and scatter and absorption spectroscopic apparatus with a sapphire tube and method for analyzing inline low level hydrocarbon in a flow medium

An apparatus for detecting hydrocarbon in a flowing medium, the apparatus comprising:

• a fitting having an input end and an output end opposite said input end;
• an input port at said input end;
• an output port at said output end;
• a sapphire tube having a hollow interior, said hollow interior being in fluid connection with said input port and said output port, said sapphire tube having a first outer side, a second outer side opposite said first outer side, and a third outer side between said first outer side and said second outer side;
• a light emitter coupled to said first outer side;
• a first detector coupled to said second outer side;
• a second detector coupled to said third outer side;
• and
• a cleaning apparatus removably engaged with said sapphire tube through said outlet end of said fitting,
• wherein said light emitter is comprised of a lens, an absorption and scatter wavelength emitter, and a fluorescence wavelength emitter parallel to said absorption and scatter wavelength emitter,
• wherein said absorption and scatter wavelength emitter is positioned across from said first detector and offset to said second detector so as to emit an incident absorption and scatter beam through said sapphire tube, said first detector receiving a first absorption and scatter transmitted beam from said incident absorption and scatter beam, said second detector receiving a second absorption and scatter transmitted beam from said incident absorption and scatter beam,
• wherein said fluorescence wavelength emitter is positioned across from said first detector and orthogonal to said second detector so as to emit an incident fluorescence beam through said sapphire tube, said first detector receiving a fluorescence transmitted beam from said incident fluorescence beam, said second detector receiving a fluorescence excited beam from said sapphire tube, and
• wherein said incident absorption and scatter beam is parallel to said incident fluorescence beam so as to determine free hydrocarbon, dissolved hydrocarbons, and solids in a sample within said sapphire tube.