Light pipe for spectroscopy

A system comprising:

• a light pipe;
• a cap configured to be inserted into the light pipe;
• a sample pipe configured to direct a sample through the cap and a cavity of the light pipe;
• and
• a spectrometer configured to perform a spectroscopic measurement when the sample is directed through the sample pipe and aligned with the spectrometer.

A system comprising:

• a light pipe that includes a first opening, a cavity, and a second opening;
• a sample pipe that includes a glass pipe or a plastic pipe,
• wherein at least a portion of the sample pipe is in the cavity, and
• wherein the first opening and the second opening includes one or more seals that form a seal around the sample pipe;
• and
• a spectrometer configured to perform spectroscopic measurements when a sample is directed through the sample pipe and aligned with the spectrometer,
• wherein the spectrometer is configured to be inserted into a portion of the cavity.