Abstract: A beverage cooling system comprising a beverage cooling apparatus and a coolant composition comprising a corrosion inhibitor, a freeze point depressant, and water; the apparatus comprising:—a housing comprising a reservoir;—means for freezing the coolant composition;—beverage inlet means;—a beverage cooling coil; and—beverage outlet means.

Abstract: An electrospray and/or atmospheric pressure ionization mass spectrometer includes an evacuated chamber, a sampling region within which is maintained a pressure greater than in the evacuation chamber, a sampling orifice that communicates between the sampling region and the evacuation chamber, and a mass analyzer that receives charged particles along a first axis through the sampling orifice from the sampling region into the evacuated chamber. A plurality of charged-particle jet generators, each having an associated jet axis, are adapted to be alternatively, selectively aligned such that a respective jet axis intersects with the first axis associated with the mass analyzer. This alignment is performed through the use of a hollow member which functions to guide charged particles through the sampling orifice to the evacuated chamber and, subsequently, to the mass analyzer.