Integral Pressure Restrictor for Capillary SFC

HPLC-FID with Superheated Water as the Eluent: Improved Methods and Instrumentation

“…This situation was greatly aggravated, when temperature programming was applied. As a solution to this problem we evaluated the use of tapered restrictors, similar to those used in supercritical fluid chromatography [12]. The use of such restrictors clearly improved detector stability.…”

Supercritical Fluid Chromatography as a Technique to Fractionate High-Valued Compounds from Lipids

“…Only a few studies involving the separation or analysis of carbohydrates by SFC have been reported. Capillary SFC with derivatization of carbohydrates is superior to GC with respect to the molecular mass range that can be used [53]. Packed columns are well adapted for separating non-derivatized mono-, diand trisaccharides, in conjunction with CO 2 , a modifying solvent and detection by evaporative light scattering (ELSD) [54].…”

Hyphenation of supercritical fluid chromatography and two-dimensional gas chromatography–mass spectrometry for group type separations

“…A split connector (Restek, Bellefonte, USA) was installed on the capillary going to the GC×GC in order to control the amount of effluent that is sent to the GC×GC. The SFC eluent was introduced into the PTV injector by an integral restrictor [31] inserted through the septum. The SFC columns were set up similar to the method described for the determination of olefin content in denatured ethanol by SFC [32] and once the retention times for each group was determined using the FID, the external valve could be switched on at these respective times to transfer the appropriate SFC fractions to the GC×GC.…”