Unit for storing a fluid, and method for producing a unit for storing a fluid

A system for providing a fluid for a biochemical analysis unit, the system comprising:

• a unit for storing a fluid, the unit including:
• a main body with a through-channel in which the fluid is arranged, the main body impermeable to the fluid and/or constituents of the fluid, the through-channel configured to extend from a first end to a second end;
• a piston mounted so as to be axially movable in the through-channel, the piston configured to provide a fluid-tight seal in relation to the main body, the piston impermeable to the fluid and/or constituents of the fluid, the piston accessible from the first end of the through-channel;
• and
• a closure arranged on the second end of the through-channel, the closure impermeable to the fluid and/or constituents of the fluid and connected to the main body in a fluid-tight manner, the closure configured to burst when a pressure in the fluid is greater than a bursting pressure;
• and
• a receiving device configured to receive the unit such that the main body is connected in a fluid-tight manner to the receiving device, the receiving device including a receiving opening configured to receive the main body, the receiving opening configured as a through-channel from an outside of the receiving device to an inside of the receiving device,
• wherein the inside is connected fluidically to the analysis unit,
• wherein the main body is arranged in the receiving opening and the outer face of the main body is sealed off in a fluid-tight manner against the receiving opening, and
• wherein the main body is configured to be connected non-releasably to the receiving device and the closure is configured to be arranged on the inside.

A method for producing a unit for providing a fluid, the method comprising:

• mounting a piston so as to be axially movable in a through-channel of a main body, the through-channel configured to receive the fluid, the main body impermeable to the fluid and constituents of the fluid, the main body configured to be connected in a fluid-tight manner to a receiving device of a biochemical analysis unit, the through-channel configured to extend from a first end to a second end, the piston configured to provide a fluid-tight seal in relation to the main body, and the piston impermeable to the fluid and/or constituents of the fluid and accessible from the first end of the through-channel;
• filling at least a part of the through-channel with the fluid from a direction of the second end;
• and
• arranging a closure on the second end of the through-channel, the closure impermeable to the fluid and/or constituents of the fluid and connected to the main body in a fluid-tight manner, the closure configured to burst when a pressure in the fluid is greater than a bursting pressure.