Corky Belobraydich, Parker Hannifin Corporation
Since the gas flow required for the separation step in gas chromatography is frequently lower that that required to optimize the detection, nitrogen is used as a make-up gas to increase the gas flow for detection. In many facilities, zero grade nitrogen make-up gas is provided from a cylinder or tank. While this approach works, an in-house "make-up" gas generator can provide the desired nitrogen with a higher level of purity than bottled nitrogen. In addition, the use of an in-house make-up gas generator can provide a considerably safer, more convenient, and less expensive approach to supply the required gas.
Design of an In-House Zero-Air Generator
In addition to the extremely high level of purity provided by the generator, the use of an in-house generator provides benefits in safety, cost, and convenience. When a MakeUpGas generator is employed, only a small amount of nitrogen is generated at a given instant and a leak would lead to a negligible change in the composition of the laboratory air. In contrast, a leak from a full tank could cause problems. When an in-house generator is employed, gas is available on a 24/7 basis and the possibility of injury or damage during the transportation and installation of a heavy gas tank, which can become a guided missile if the valve on a full tank is compromised during transport, is eliminated. In addition to the significant safety and convenience benefits, there is an economic benefit from using a MakeUpGas generator. The running cost of operation maintenance of the MakeupGas generator is extremely low; as the raw materials to prepare the required gas are air and electricity.
Parker Hannifin Corporation