Patent ID: 7837943

Claim:
A device for pre-treating and injecting a liquid specimen, comprising: a second syringe comprising a second tube having an inner diameter, the second tube including an open top and a second hole in a bottom; a first syringe comprising: a first tube having an open top and a first hole in a bottom, the first tube having an outer diameter less than the inner diameter of the second tube; protrusions formed in a lower and outer wall of the first tube; a second piston capable of moving along an inner wall of the second tube and having a third hole; and a communication channel providing a fluid communication between the first hole of the first tube and the third hole of the second piston, and fixing the second piston to the first tube; and a joint portion being attachable to and detachable from a top of the second tube and having an opening having a shape which corresponds to a transverse cross-section of the first tube and grooves having a shape which corresponds to the shape of the protrusions such that the first tube can pass through the joint portion when the protrusions are matched with the grooves.