A Comparison of Liquid Hydrocarbon Calibration Standards in Piston Cylinders and Standard Cylinders with Eductor Tubes |
Robert Benesch, Tracey Jacksier |
| Analytical Chemistry, 73 (2), 379, 2001 |
| Natural gas liquid standards consist of various components primarily in the C1 - C6 range; they are available in three types of cylinder packages: piston cylinders and two types of other cylinders with eductor tubes. The three cylinder packages have different operation conditions and thus a sample may behave differently in each of the packages. The piston cylinder maintains the components in a single liquid phase at a constant pressure, while the standard cylinders maintain the components as a two phase mixture. Typically, the components may distribute between the two phases in different concentrations depending on the various thermodynamic variables, such as temperature, pressure and volume |
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