Patent ID: 7847936

Claim:
Apparatus for the detection of one or more analytes present in a fluid, said apparatus comprising: a) vessel means in communication with a source of fluid, and operable to evaporate solvent from said fluid and, in the presence of an analyte, to produce a stream of particles; b) a radiation source in photo communication with said vessel means for generating a plurality of beams of radiation within said vessel means, said a plurality of beams of radiation directed to and received by said stream of particles in said vessel means to produce at least one first reflected beam having a first scattering angle and to produce at least one second reflected beam having a second scattering angle; and c) radiation detection means in photo-communication with said vessel means for receiving said first reflected beam at said first scattering angle and producing a first scattering angle signal and for receiving said second reflected beam at said second scattering angle and producing a second scattering angle signal; said first scattering angle signal and said second scattering angle signal indicative of the presence or absence or quantity of an analyte.