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

A method for detecting, comprising the steps of:

• installing an apparatus in a flowing medium, said flowing medium being comprised of free hydrocarbons, dissolved hydrocarbons, and solids,
• wherein said apparatus comprises:
• 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;
• and
• a second detector coupled to said third outer side,
• 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,
• wherein said fluorescence wavelength emitter is positioned across from said first detector and orthogonal to said second detector, and
• wherein said incident absorption and scatter beam is parallel to said incident fluorescence beam;
• emitting said incident absorption and scatter beam through said sapphire tube from said absorption and scatter wavelength emitter;
• absorbing said incident absorption and scatter beam;
• scattering said incident absorption and scatter beam;
• receiving said first absorption and scatter transmitted beam from said incident absorption and scatter beam with said first detector;
• receiving said second absorption and scatter transmitted beam from said incident absorption and scatter beam with said second detector,
• wherein said incident absorption and scatter beam has a selected absorption and scatter wavelength for targeted absorption measurements;
• emitting said incident fluorescence beam through said sapphire tube from said fluorescence wavelength emitter;
• exciting said free hydrocarbons and said dissolved hydrocarbon to generate said fluorescence excited beam;
• receiving said fluorescence transmitted beam from said incident fluorescence beam with said first receiver;
• receiving said fluorescence excited beam from said sapphire tube with said second receiver,
• wherein said incident fluorescence beam has a selected fluorescence wavelength for desired excited fluorescence measurements;
• and
• detecting said free hydrocarbons, said dissolved hydrocarbons and said solids, according to said selected absorption and scatter wavelength of said first absorption and scatter transmitted beam, said second absorption and scatter transmitted beam, said selected fluorescence wavelength of fluorescence transmitted beam, and said fluorescence excited beam.