Dear all, The e-mail archive already gave me some information on comparing nitrogen and air when used as a sheath carrier (propellant) in cell sorters. It was said that buying the pump is cheaper than having nitrogen delivered in tanks, but the humidity in air causes problems. Since outside air needs to be filtered and dried, there are operational costs involved (e.g. drying column refill). Has anybody compared the overall cost and convenience of nitrogen vs. air? I would appreciate more detailed information and recommendations on this matter.
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