Rapid test breathalyzer and methods of use thereof

Abstract

Described herein are rapid breath testing devices, systems and methods. The device may include a mouthpiece operable to receive air flow from a breath; and a cassette comprising a biosensor and a cassette conduit, the cassette removably connected to the mouthpiece such that at least a sample of the air flow passes through the cassette conduit and over the biosensor. The biosensor may include a plurality of graphene-based sensors and may be operable to detect at least one volatile organic compound in the air flow sample.

What is claimed is: 
     
         1 . A mouthpiece comprising:
 a body;   a body conduit through the body of the mouthpiece, the body conduit comprising a breath inlet, and a sample air flow outlet;   a desiccant within the body conduit; and   a check valve within the body conduit, wherein the mouthpiece is operable to receive air flow from a breath of a user at the breath inlet and pass at least a sample of the air flow out the sample air flow outlet, and wherein the check valve is operable to prevent backflow of the air flow to the user.   
     
     
         2 . The mouthpiece of  claim 1 , wherein the desiccant is operable to remove liquid from the air flow, such that the desiccant reduces the humidity of the air flow sample as compared to the air flow from the breath. 
     
     
         3 . The mouthpiece of  claim 1 , further comprising a filter within the body conduit. 
     
     
         4 . The mouthpiece of  claim 4 , wherein the filter is operable to remove particles from the air flow before the air flow sample reaches the sample air flow outlet. 
     
     
         5 . The mouthpiece of  claim 4 , wherein the filter is a size selective filter. 
     
     
         6 . The mouthpiece of  claim 1 , wherein the sample air flow outlet is configured to be coupled to a cassette inlet of a cassette comprising a biosensor including a plurality of graphene-based sensors and the biosensor is operable to detect at least one volatile organic compound (VOC) through the plurality of graphene-based sensors. 
     
     
         7 . The mouthpiece of  claim 6 , wherein the check valve is operable to prevent backflow of the air flow to the user from either or both the body conduit of the mouthpiece and a cassette conduit of the cassette. 
     
     
         8 . The mouthpiece of  claim 1 , wherein the check valve is an umbrella check valve. 
     
     
         9 . The mouthpiece of  claim 1 , further comprising a mouthguard operable to prevent the user from overshooting the mouthpiece. 
     
     
         10 . The mouthpiece of  claim 1 , wherein the mouthpiece is disposable. 
     
     
         11 . The mouthpiece of  claim 1 , wherein the body comprises a first housing and a second housing, and wherein the first housing snap fits to the second housing to form the body. 
     
     
         12 . The mouthpiece of  claim 1 , wherein the body conduit further comprises an exhaust. 
     
     
         13 . The mouthpiece of  claim 12 , wherein 80% to 95% of the air flow from the breath entering the breath inlet exits through the exhaust and any remaining air flow is the air flow sample.