A system for delivering fluid such as ammonia nitrogen 13 isprovided. According to one example, the system includes a reelassembly including a cartridge reel that is mounted on a shaftand is capable of being rotated and defines cartridge receivingrecesses for supporting cartridges, a linear actuator that isaxially alignable with a cartridge supported in the cartridgereceiving recess capable of actuating and pushing a cartridge outof the cartridge receiving recess and in fluid communication witha first input line that fills the cartridge with an inputproduct, and a gun assembly capable of receiving the cartridgeand for causing the cartridge to be pierced such that the inputproduct can be delivered to a vial and the vial filled with theinput product for testing purposes.
