In X-Ray crystallography a cryo-head is used to freeze samples such as proteins in order to obtain crystalline structures suitable for subsequent analysis. Such a cryo-head uses liquid nitrogen to freeze samples and hence requires a supply of nitrogen. Instrument manufacturers such as Rigaku and Oxford Cryosystems have cryo-head designs that can be fed with nitrogen in liquid form from a dewar or, more cost effectively, by nitrogen produced by an in-situ laboratory nitrogen generator. Nitrogen is allso used in X-Ray Crystallography instruments as a laminar curtain flow gas. Parker domnick hunter offers a range of nitrogen generators ideally suited to the supply of nitrogen gas to cryo-heads used in X-Ray Crystallography studies.
