Devices, systems and methods for determining drug composition and volume

A system for collecting and identifying drug waste in a liquid, the system comprising:

• a waste input port to receive liquid drug waste;
• a sample chamber coupled to the waste input port, wherein the sample chamber is configured for spectroscopic measurement of liquid drug waste within the chamber, the sample chamber further comprising a plurality of electrode pairs configured to contact received liquid drug waste;
• a spectroscopic light source and spectroscopic detector configured to provide optical energy to liquid drug waste within the sample chamber to detect optical spectroscopic information from the liquid drug waste
• a signal generator configured to provide electrical energy to liquid drug waste within the sample chamber at a plurality of frequencies;
• a processor configured to receive optical spectroscopic information and complex immittance information for a plurality of frequencies from the plurality of electrode pairs, and to determine the identity and amount of drug in a received liquid drug waste from the optical spectroscopic information and complex immittance information;
• and
• a collection chamber to collect liquid drug waste.

A method of collecting and identifying drug waste in a liquid, the method comprising:

• receiving a liquid drug waste;
• determining spectroscopic information from the liquid drug waste for a plurality of frequencies;
• determining the identity and amount of drug in the liquid drug waste by comparing the spectroscopic information to a library of known spectroscopic profiles;
• and
• collecting the liquid drug waste in a collection chamber.