Payne, KM
1990
Multidimensional Packed Capillary Coupled to Open Tubular Column Supercritical Fluid Chromatography Using a Valve-Switching Interface
Juvancz, Z.; Payne, K.M.; Markides, K.E. and Lee, M.L.
Analytical Chemistry, 62, 1990. Funded by Brigham Young University.
An on-line two-dimensional supercritical fluid chromatographic system (SFC/SFC) was constructed by utilizing a rotary valve interface to provide independent flow control of the two dimensions. A cold trap was employed to refocus solutes from single or multiple fractional cuts, after being transferred to the second dimension. Improved performance, including time savings, was achieved with a packed capillary to open tubular column arrangement and two independently controlled pumps, compared to earlier reported single-pump open tubular column SFC/SFC and packed capillary column SFC/SFC systems. The packed capillary in the first dimension provided a rapid chemical class separation, while the open tubular column in the second dimension provided high resolution of closely related isomers.
Payne, KM
1990
Multidimensional Packed Capillary Coupled to Open Tubular Column Supercritical Fluid Chromatography Using a Valve-Switching Interface
Juvancz, Z.; Payne, K.M.; Markides, K.E. and Lee, M.L.
Analytical Chemistry, 62, 1990. Funded by Brigham Young University.
An on-line two-dimensional supercritical fluid chromatographic system (SFC/SFC) was constructed by utilizing a rotary valve interface to provide independent flow control of the two dimensions. A cold trap was employed to refocus solutes from single or multiple fractional cuts, after being transferred to the second dimension. Improved performance, including time savings, was achieved with a packed capillary to open tubular column arrangement and two independently controlled pumps, compared to earlier reported single-pump open tubular column SFC/SFC and packed capillary column SFC/SFC systems. The packed capillary in the first dimension provided a rapid chemical class separation, while the open tubular column in the second dimension provided high resolution of closely related isomers.