Patent ID: 7393504

Claim:
A flow injection electrochemical device comprising: a base ( 10 ) with a top, a front end, a rear end, and sides, and having a recess ( 12 ) defined in the top extending to the front end and a pivotal post ( 11 ) formed near the rear end; a working electrode ( 50 ) being placed inside the recess ( 12 ); a cover ( 20 ) with a top, a bottom, a front end, a rear end and two sides, which pivotally mounts on the base ( 10 ) and has a cutout ( 21 ) defined at the rear end to receive the pivotal post ( 11 ) of the base ( 10 ), a pin ( 111 ) penetrating the cover ( 20 ) at the cutout ( 21 ) and the pivotal post ( 11 ) to pivotally connect the cover ( 20 ) to the base ( 10 ), an annular trench ( 28 ) defined in the bottom of the cover, a resilient separator with an inner opening, which is an O-ring ( 282 ) and is partially mounted in the annular trench ( 28 ) of the cover ( 20 ), and multiple channels defined in the cover ( 20 ) and each having an opening at an area within the annular trench ( 28 ) to communicate with the inner opening of the resilient separator; said cover ( 20 ) including a first outlet ( 24 ) and a second outlet ( 26 ) and an reference electrode ( 30 ) and auxiliary electrode ( 40 ) engaged within said first outlet and said second outlet respectively; and a locking device attached between the base ( 10 ) and the cover ( 20 ).