𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Development of packed capillary columns using carbon dioxide slurries

✍ Scribed by Josef Planeta; Pavel Karásek; Jiří Vejrosta

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
273 KB
Volume
26
Category
Article
ISSN
1615-9306

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A modified procedure for the preparation of packed capillary columns by the use of supercritical or liquid carbon dioxide slurries is proposed. This technique removes the problems arising from sudden and rapid movement of sorbent suspension at the beginning of the filling process. The parameters influencing the packing process (temperature, pressure, and restrictor that controls the flow rate of CO~2~), have been optimized. The columns prepared under optimized conditions exhibit high efficiency (average value of the reduced plate height h′ ca. 2.2), and long term stability. An example of the SFC separation of polydimethylsiloxanes in silicone oil is presented.

📜 SIMILAR VOLUMES

Preparation of long packed capillary col
Preparation of long packed capillary columns using carbon dioxide slurries
✍ Abdul Malik; Wenbao Li; Milton L. Lee 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 758 KB

## Abstract A new, reproducible method is described for the preparation of highly efficient fused silica packed capillary columns using pressure programmed liquid or supercritical carbon dioxide to carry the packing material into the capillary. The method allows facile preparation of long, uniforml

Factors affecting the preparation of pac
Factors affecting the preparation of packed capillary columns in supercritical carbon dioxide media
✍ Pernilla Koivisto; Rolf Danielsson; Karin E. Markides 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 100 KB 👁 2 views

In this study, packed capillary columns were prepared using supercritical carbon dioxide as a packing carrier. A factorial design was used to examine the effect that four selected factors have on the packing performance. The investigated . . . factors were: 1 packing pressure, 2 carbon dioxide flow

Preparation and evaluation of supercriti
Preparation and evaluation of supercritical carbon dioxide-packed capillary columns for HPLC and SFC
✍ Daixin Tong; Keith D. Bartle; Anthony A. Clifford 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 537 KB

## Abstract Preparation of packed capillary columns with supercritical carbon dioxide as the packing carrier is demonstrated; column performance was evaluated by both HPLC and SFC. It is shown that this procedure yields excellent column performance. The density of the packed bed can be controlled b

Optimization of chiral resolution using
Optimization of chiral resolution using packed columns with carbon dioxide-based mobile phases
✍ Kenneth G. Lynam; John A. Blackwell 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 56 KB 👁 2 views

Optimization of chiral resolution, using carbon dioxide based mobile phases, must take into consideration the individual contributions of analyte retention, selectivity, and efficiency. Each of these factors may be independently affected by changes in pressure, temperature, or state of the mobile ph

Gas chromatography of hydrocarbons using
Gas chromatography of hydrocarbons using packed liquid chromatographic capillary columns
✍ Takeuchi, Toyohide ;Watanabe, Mototada ;Hamanaka, Tadashi ;Haraguchi, Hiroki ;Is 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 331 KB 👁 1 views

## Abstract Capillary columns of 0.3‐0.5 mm i.d. packed with 3‐ to 30‐μm silica‐based stationary phases for liquid chromatography were used for gas chromatographic separation of hydrocarbons. Column efficiencies were evaluated for various commercially available packing material. The best column eff