Herein we report a novel method for the synthesis and processing of molecular recognition materials using supercritical fluid technology. Semi-covalently imprinted polymers with adsorption affinity to bisphenol A (BPA) were prepared for the first time in scCO2, at 65 oC and 21 MPa. BPA hydrolysis from the polymeric matrix was also performed in supercritical environment using a specific cleavage...

pressure (Pe) and temperature (T ). Three-dimensional network shown in two perspectives. Conditions: 25 cm 4.6 mm i.d. packed column, 10 m silica particles; n-pentane. (Reprinted with permission from Lee ML and Markides KE (eds) (1990) Analytical Supercritical Fluid and Extraction. Provo, UT, USA: Chromatography Conferences, Inc.) Jusforgues P (1995) In: Subramanian G (eds) Process Scale Liquid...

glichkeiten. Angewandte Chemie 105: 659; Angewandte Chemie, International Edition English 32: 629. Francuskiewicz F (1994) Polymer Fractionation (Springer Lab Manual). Heidelberg: Springer Verlag. GloK ckner G (1987) Polymer Characterization by Liquid Chromatography. Amsterdam: Elsevier. GloK ckner G (1991) Gradient HPLC of copolymers and chromatographic cross fractionation. Berlin: Springer Ve...

This review enlightens the role of supercritical fluid chromatography (SFC) in the field of lipid analysis. SFC has been popular in the late 1980s and 1990s before almost disappearing due to the commercial success of liquid chromatography (LC). It is only 20 years later that a regain of interest appeared when new commercial instruments were introduced. As SFC is fully compatible with the inject...

Supercritical fluid extraction systems can be configured in a number of different ways and the operating conditions can span the full continuum of temperatures and pressures. Every combination presents differing solubilities and mass transfer behaviour and results in different cost. Optimal conditions for processing are rarely coincident with optimal conditions for maximum solubility. For a typ...

We have applied in situ FTIR, ATR-IR and photoacoustic spectroscopy to identify for the first time specific molecular interactions between CO2 and polymers that may be responsible for the plasticization of glassy polymers. The changes in IR spectra of CO2 incorporated into various polymers indicate a specific interaction between CO2 and polymer functional groups. Increased polymer segmental mob...

In petrochemical analysis it is often not necessary to identify every compound in a sample. The boiling point distribution and group composition, e.g. aliphatic and aromatic groups or straight chain versus branched alkanes determine, to a large extent, the physical characteristics of fuels. The oxygenated group content of a fuel is another important parameter. It is believed that high oxygen co...

The reported work demonstrates and discusses the effect of supercritical fluid density (pressure and temperature of supercritical fluid carbon dioxide) on particle size and distribution using the supercritical antisolvent (SAS) method in the purpose of drug encapsulation. In this study, paracetamol was encapsulated inside L-polylactic acid, a semicrystalline polymer, with different process para...

Supercritical fluid extraction (SFE), which has received much interest in its use and further development for industrial applications, is a method that offers some advantages over conventional methods, especially for the palm oil industry. SC-CO₂ refers to supercritical fluid extraction (SFE) that uses carbon dioxide (CO₂) as a solvent which is a nontoxic, inexpensive, nonflammable, and nonpoll...